cmd/decode.go

@@ -4,7 +4,7 @@ import (
 	"encoding/hex"
 	"fmt"
 
-	"github.com/lbryio/lbry.go/v2/schema/claim"
+	"github.com/lbryio/lbry.go/v2/schema/stake"
 
 	"github.com/davecgh/go-spew/spew"
 	"github.com/golang/protobuf/jsonpb"
@@ -23,7 +23,7 @@ func init() {
 }
 
 func decodeCmd(cmd *cobra.Command, args []string) {
-	c, err := claim.DecodeClaimHex(args[0], "")
+	c, err := stake.DecodeClaimHex(args[0], "")
 	if err != nil {
 		log.Fatal(err)
 	}

cmd/getstream.go

@@ -41,7 +41,7 @@ func getStreamCmd(cmd *cobra.Command, args []string) {
 
 	var sd stream.SDBlob
 
-	sdb, err := s.Get(sdHash)
+	sdb, _, err := s.Get(sdHash)
 	if err != nil {
 		log.Fatal(err)
 	}
@@ -62,7 +62,7 @@ func getStreamCmd(cmd *cobra.Command, args []string) {
 	}
 
 	for i := 0; i < len(sd.BlobInfos)-1; i++ {
-		b, err := s.Get(hex.EncodeToString(sd.BlobInfos[i].BlobHash))
+		b, _, err := s.Get(hex.EncodeToString(sd.BlobInfos[i].BlobHash))
 		if err != nil {
 			log.Fatal(err)
 		}

cmd/integrity.go

@@ -0,0 +1,93 @@
+package cmd
+
+import (
+	"crypto/sha512"
+	"encoding/hex"
+	"io/ioutil"
+	"os"
+	"path"
+	"runtime"
+	"sync/atomic"
+	"time"
+
+	"github.com/lbryio/lbry.go/v2/extras/errors"
+	"github.com/lbryio/reflector.go/meta"
+	"github.com/lbryio/reflector.go/store/speedwalk"
+
+	log "github.com/sirupsen/logrus"
+	"github.com/spf13/cobra"
+)
+
+var threads int
+
+func init() {
+	var cmd = &cobra.Command{
+		Use:   "check-integrity",
+		Short: "check blobs integrity for a given path",
+		Run:   integrityCheckCmd,
+	}
+	cmd.Flags().StringVar(&diskStorePath, "store-path", "", "path of the store where all blobs are cached")
+	cmd.Flags().IntVar(&threads, "threads", runtime.NumCPU()-1, "number of concurrent threads to process blobs")
+	rootCmd.AddCommand(cmd)
+}
+
+func integrityCheckCmd(cmd *cobra.Command, args []string) {
+	log.Printf("reflector %s", meta.VersionString())
+	if diskStorePath == "" {
+		log.Fatal("store-path must be defined")
+	}
+
+	blobs, err := speedwalk.AllFiles(diskStorePath, true)
+	if err != nil {
+		log.Errorf("error while reading blobs from disk %s", errors.FullTrace(err))
+	}
+	tasks := make(chan string, len(blobs))
+	done := make(chan bool)
+	processed := new(int32)
+	go produce(tasks, blobs)
+	cpus := runtime.NumCPU()
+	for i := 0; i < cpus-1; i++ {
+		go consume(i, tasks, done, len(blobs), processed)
+	}
+	<-done
+}
+
+func produce(tasks chan<- string, blobs []string) {
+	for _, b := range blobs {
+		tasks <- b
+	}
+	close(tasks)
+}
+
+func consume(worker int, tasks <-chan string, done chan<- bool, totalTasks int, processed *int32) {
+	start := time.Now()
+
+	for b := range tasks {
+		checked := atomic.AddInt32(processed, 1)
+		if worker == 0 {
+			remaining := int32(totalTasks) - checked
+			timePerBlob := time.Since(start).Microseconds() / int64(checked)
+			remainingTime := time.Duration(int64(remaining)*timePerBlob) * time.Microsecond
+			log.Infof("[T%d] %d/%d blobs checked. ETA: %s", worker, checked, totalTasks, remainingTime.String())
+		}
+		blobPath := path.Join(diskStorePath, b[:2], b)
+		blob, err := ioutil.ReadFile(blobPath)
+		if err != nil {
+			if os.IsNotExist(err) {
+				continue
+			}
+			log.Errorf("[Worker %d] Error looking up blob %s: %s", worker, b, err.Error())
+			continue
+		}
+		hashBytes := sha512.Sum384(blob)
+		readHash := hex.EncodeToString(hashBytes[:])
+		if readHash != b {
+			log.Infof("[%s] found a broken blob while reading from disk. Actual hash: %s", b, readHash)
+			err := os.Remove(blobPath)
+			if err != nil {
+				log.Errorf("Error while deleting broken blob %s: %s", b, err.Error())
+			}
+		}
+	}
+	done <- true
+}

cmd/peer.go

@@ -33,11 +33,13 @@ func peerCmd(cmd *cobra.Command, args []string) {
 	peerServer := peer.NewServer(s3)
 
 	if !peerNoDB {
-		db := new(db.SQL)
+		db := &db.SQL{
+			LogQueries: log.GetLevel() == log.DebugLevel,
+		}
 		err = db.Connect(globalConfig.DBConn)
 		checkErr(err)
 
-		combo := store.NewDBBackedStore(s3, db)
+		combo := store.NewDBBackedStore(s3, db, false)
 		peerServer = peer.NewServer(combo)
 	}
 

cmd/populatedb.go

@@ -0,0 +1,47 @@
+package cmd
+
+import (
+	"github.com/lbryio/lbry.go/v2/extras/errors"
+	"github.com/lbryio/reflector.go/db"
+	"github.com/lbryio/reflector.go/meta"
+	"github.com/lbryio/reflector.go/store/speedwalk"
+
+	log "github.com/sirupsen/logrus"
+	"github.com/spf13/cobra"
+)
+
+var (
+	diskStorePath string
+)
+
+func init() {
+	var cmd = &cobra.Command{
+		Use:   "populate-db",
+		Short: "populate local database with blobs from a disk storage",
+		Run:   populateDbCmd,
+	}
+	cmd.Flags().StringVar(&diskStorePath, "store-path", "",
+		"path of the store where all blobs are cached")
+	rootCmd.AddCommand(cmd)
+}
+
+func populateDbCmd(cmd *cobra.Command, args []string) {
+	log.Printf("reflector %s", meta.VersionString())
+	if diskStorePath == "" {
+		log.Fatal("store-path must be defined")
+	}
+	localDb := &db.SQL{
+		SoftDelete:  true,
+		TrackAccess: db.TrackAccessBlobs,
+		LogQueries:  log.GetLevel() == log.DebugLevel,
+	}
+	err := localDb.Connect("reflector:reflector@tcp(localhost:3306)/reflector")
+	if err != nil {
+		log.Fatal(err)
+	}
+	blobs, err := speedwalk.AllFiles(diskStorePath, true)
+	err = localDb.AddBlobs(blobs)
+	if err != nil {
+		log.Errorf("error while storing to db: %s", errors.FullTrace(err))
+	}
+}

cmd/reflector.go

@@ -8,22 +8,28 @@ import (
 	"syscall"
 	"time"
 
+	"github.com/lbryio/lbry.go/v2/extras/errors"
+	"github.com/lbryio/lbry.go/v2/extras/stop"
 	"github.com/lbryio/reflector.go/db"
 	"github.com/lbryio/reflector.go/internal/metrics"
 	"github.com/lbryio/reflector.go/meta"
 	"github.com/lbryio/reflector.go/peer"
 	"github.com/lbryio/reflector.go/peer/http3"
 	"github.com/lbryio/reflector.go/reflector"
+	"github.com/lbryio/reflector.go/server/http"
 	"github.com/lbryio/reflector.go/store"
 
+	"github.com/lbryio/lbry.go/v2/stream"
+
+	"github.com/c2h5oh/datasize"
 	log "github.com/sirupsen/logrus"
-	"github.com/spf13/cast"
 	"github.com/spf13/cobra"
 )
 
 var (
 	tcpPeerPort                 int
 	http3PeerPort               int
+	httpPort                    int
 	receiverPort                int
 	metricsPort                 int
 	disableUploads              bool
@@ -33,8 +39,11 @@ var (
 	proxyProtocol               string
 	useDB                       bool
 	cloudFrontEndpoint          string
+	WasabiEndpoint              string
 	reflectorCmdDiskCache       string
+	bufferReflectorCmdDiskCache string
 	reflectorCmdMemCache        int
+	requestQueueSize            int
 )
 
 func init() {
@@ -47,28 +56,34 @@ func init() {
 	cmd.Flags().StringVar(&proxyPort, "proxy-port", "5567", "port of another reflector server where blobs are fetched from")
 	cmd.Flags().StringVar(&proxyProtocol, "proxy-protocol", "http3", "protocol used to fetch blobs from another reflector server (tcp/http3)")
 	cmd.Flags().StringVar(&cloudFrontEndpoint, "cloudfront-endpoint", "", "CloudFront edge endpoint for standard HTTP retrieval")
+	cmd.Flags().StringVar(&WasabiEndpoint, "wasabi-endpoint", "", "Wasabi edge endpoint for standard HTTP retrieval")
 	cmd.Flags().IntVar(&tcpPeerPort, "tcp-peer-port", 5567, "The port reflector will distribute content from")
 	cmd.Flags().IntVar(&http3PeerPort, "http3-peer-port", 5568, "The port reflector will distribute content from over HTTP3 protocol")
+	cmd.Flags().IntVar(&httpPort, "http-port", 5569, "The port reflector will distribute content from over HTTP protocol")
 	cmd.Flags().IntVar(&receiverPort, "receiver-port", 5566, "The port reflector will receive content from")
 	cmd.Flags().IntVar(&metricsPort, "metrics-port", 2112, "The port reflector will use for metrics")
+	cmd.Flags().IntVar(&requestQueueSize, "request-queue-size", 200, "How many concurrent requests should be submitted to upstream")
 	cmd.Flags().BoolVar(&disableUploads, "disable-uploads", false, "Disable uploads to this reflector server")
 	cmd.Flags().BoolVar(&disableBlocklist, "disable-blocklist", false, "Disable blocklist watching/updating")
 	cmd.Flags().BoolVar(&useDB, "use-db", true, "whether to connect to the reflector db or not")
 	cmd.Flags().StringVar(&reflectorCmdDiskCache, "disk-cache", "",
-		"enable disk cache, setting max size and path where to store blobs. format is 'MAX_BLOBS:CACHE_PATH'")
+		"enable disk cache, setting max size and path where to store blobs. format is 'sizeGB:CACHE_PATH'")
+	cmd.Flags().StringVar(&bufferReflectorCmdDiskCache, "buffer-disk-cache", "",
+		"enable buffer disk cache, setting max size and path where to store blobs. format is 'sizeGB:CACHE_PATH'")
 	cmd.Flags().IntVar(&reflectorCmdMemCache, "mem-cache", 0, "enable in-memory cache with a max size of this many blobs")
 	rootCmd.AddCommand(cmd)
 }
 
 func reflectorCmd(cmd *cobra.Command, args []string) {
 	log.Printf("reflector %s", meta.VersionString())
+	cleanerStopper := stop.New()
 
 	// the blocklist logic requires the db backed store to be the outer-most store
 	underlyingStore := setupStore()
-	outerStore := wrapWithCache(underlyingStore)
+	outerStore := wrapWithCache(underlyingStore, cleanerStopper)
 
 	if !disableUploads {
-		reflectorServer := reflector.NewServer(underlyingStore)
+		reflectorServer := reflector.NewServer(underlyingStore, outerStore)
 		reflectorServer.Timeout = 3 * time.Minute
 		reflectorServer.EnableBlocklist = !disableBlocklist
 
@@ -86,21 +101,31 @@ func reflectorCmd(cmd *cobra.Command, args []string) {
 	}
 	defer peerServer.Shutdown()
 
-	http3PeerServer := http3.NewServer(outerStore)
+	http3PeerServer := http3.NewServer(outerStore, requestQueueSize)
 	err = http3PeerServer.Start(":" + strconv.Itoa(http3PeerPort))
 	if err != nil {
 		log.Fatal(err)
 	}
 	defer http3PeerServer.Shutdown()
 
+	httpServer := http.NewServer(outerStore)
+	err = httpServer.Start(":" + strconv.Itoa(httpPort))
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer httpServer.Shutdown()
+
 	metricsServer := metrics.NewServer(":"+strconv.Itoa(metricsPort), "/metrics")
 	metricsServer.Start()
 	defer metricsServer.Shutdown()
+	defer outerStore.Shutdown()
+	defer underlyingStore.Shutdown()
 
 	interruptChan := make(chan os.Signal, 1)
 	signal.Notify(interruptChan, os.Interrupt, syscall.SIGTERM)
 	<-interruptChan
 	// deferred shutdowns happen now
+	cleanerStopper.StopAndWait()
 }
 
 func setupStore() store.BlobStore {
@@ -118,36 +143,80 @@ func setupStore() store.BlobStore {
 				Address: proxyAddress + ":" + proxyPort,
 				Timeout: 30 * time.Second,
 			})
+		case "http":
+			s = store.NewHttpStore(proxyAddress + ":" + proxyPort)
 		default:
 			log.Fatalf("protocol is not recognized: %s", proxyProtocol)
 		}
 	} else {
-		s3Store := store.NewS3Store(globalConfig.AwsID, globalConfig.AwsSecret, globalConfig.BucketRegion, globalConfig.BucketName)
+		var s3Store *store.S3Store
-		if cloudFrontEndpoint != "" {
+		if conf != "none" {
-			s = store.NewCloudFrontRWStore(store.NewCloudFrontROStore(cloudFrontEndpoint), s3Store)
+			s3Store = store.NewS3Store(globalConfig.AwsID, globalConfig.AwsSecret, globalConfig.BucketRegion, globalConfig.BucketName)
+		}
+		if cloudFrontEndpoint != "" && WasabiEndpoint != "" {
+			ittt := store.NewITTTStore(store.NewCloudFrontROStore(WasabiEndpoint), store.NewCloudFrontROStore(cloudFrontEndpoint))
+			if s3Store != nil {
+				s = store.NewCloudFrontRWStore(ittt, s3Store)
 			} else {
+				s = ittt
+			}
+		} else if s3Store != nil {
 			s = s3Store
+		} else {
+			log.Fatalf("this configuration does not include a valid upstream source")
 		}
 	}
 
 	if useDB {
-		db := new(db.SQL)
+		dbInst := &db.SQL{
-		db.TrackAccessTime = true
+			TrackAccess: db.TrackAccessStreams,
-		err := db.Connect(globalConfig.DBConn)
+			LogQueries:  log.GetLevel() == log.DebugLevel,
+		}
+		err := dbInst.Connect(globalConfig.DBConn)
 		if err != nil {
 			log.Fatal(err)
 		}
 
-		s = store.NewDBBackedStore(s, db)
+		s = store.NewDBBackedStore(s, dbInst, false)
 	}
 
 	return s
 }
 
-func wrapWithCache(s store.BlobStore) store.BlobStore {
+func wrapWithCache(s store.BlobStore, cleanerStopper *stop.Group) store.BlobStore {
 	wrapped := s
 
-	diskCacheMaxSize, diskCachePath := diskCacheParams()
+	diskCacheMaxSize, diskCachePath := diskCacheParams(reflectorCmdDiskCache)
+	//we are tracking blobs in memory with a 1 byte long boolean, which means that for each 2MB (a blob) we need 1Byte
+	// so if the underlying cache holds 10MB, 10MB/2MB=5Bytes which is also the exact count of objects to restore on startup
+	realCacheSize := float64(diskCacheMaxSize) / float64(stream.MaxBlobSize)
+	if diskCacheMaxSize > 0 {
+		err := os.MkdirAll(diskCachePath, os.ModePerm)
+		if err != nil {
+			log.Fatal(err)
+		}
+
+		localDb := &db.SQL{
+			SoftDelete:  true,
+			TrackAccess: db.TrackAccessBlobs,
+			LogQueries:  log.GetLevel() == log.DebugLevel,
+		}
+		err = localDb.Connect("reflector:reflector@tcp(localhost:3306)/reflector")
+		if err != nil {
+			log.Fatal(err)
+		}
+		dbBackedDiskStore := store.NewDBBackedStore(store.NewDiskStore(diskCachePath, 2), localDb, true)
+		wrapped = store.NewCachingStore(
+			"reflector",
+			wrapped,
+			dbBackedDiskStore,
+		)
+
+		go cleanOldestBlobs(int(realCacheSize), localDb, dbBackedDiskStore, cleanerStopper)
+	}
+
+	diskCacheMaxSize, diskCachePath = diskCacheParams(bufferReflectorCmdDiskCache)
+	realCacheSize = float64(diskCacheMaxSize) / float64(stream.MaxBlobSize)
 	if diskCacheMaxSize > 0 {
 		err := os.MkdirAll(diskCachePath, os.ModePerm)
 		if err != nil {
@@ -156,7 +225,7 @@ func wrapWithCache(s store.BlobStore) store.BlobStore {
 		wrapped = store.NewCachingStore(
 			"reflector",
 			wrapped,
-			store.NewLRUStore("peer_server", store.NewDiskStore(diskCachePath, 2), diskCacheMaxSize),
+			store.NewLFUDAStore("nvme", store.NewDiskStore(diskCachePath, 2), realCacheSize),
 		)
 	}
 
@@ -164,32 +233,105 @@ func wrapWithCache(s store.BlobStore) store.BlobStore {
 		wrapped = store.NewCachingStore(
 			"reflector",
 			wrapped,
-			store.NewLRUStore("peer_server", store.NewMemStore(), reflectorCmdMemCache),
+			store.NewLRUStore("mem", store.NewMemStore(), reflectorCmdMemCache),
 		)
 	}
 
 	return wrapped
 }
 
-func diskCacheParams() (int, string) {
+func diskCacheParams(diskParams string) (int, string) {
-	if reflectorCmdDiskCache == "" {
+	if diskParams == "" {
 		return 0, ""
 	}
 
-	parts := strings.Split(reflectorCmdDiskCache, ":")
+	parts := strings.Split(diskParams, ":")
 	if len(parts) != 2 {
 		log.Fatalf("--disk-cache must be a number, followed by ':', followed by a string")
 	}
 
-	maxSize := cast.ToInt(parts[0])
+	diskCacheSize := parts[0]
-	if maxSize <= 0 {
-		log.Fatalf("--disk-cache max size must be more than 0")
-	}
-
 	path := parts[1]
 	if len(path) == 0 || path[0] != '/' {
 		log.Fatalf("--disk-cache path must start with '/'")
 	}
 
-	return maxSize, path
+	var maxSize datasize.ByteSize
+	err := maxSize.UnmarshalText([]byte(diskCacheSize))
+	if err != nil {
+		log.Fatal(err)
+	}
+	if maxSize <= 0 {
+		log.Fatal("--disk-cache size must be more than 0")
+	}
+	return int(maxSize), path
+}
+
+func cleanOldestBlobs(maxItems int, db *db.SQL, store store.BlobStore, stopper *stop.Group) {
+	// this is so that it runs on startup without having to wait for 10 minutes
+	err := doClean(maxItems, db, store, stopper)
+	if err != nil {
+		log.Error(errors.FullTrace(err))
+	}
+	const cleanupInterval = 10 * time.Minute
+	for {
+		select {
+		case <-stopper.Ch():
+			log.Infoln("stopping self cleanup")
+			return
+		case <-time.After(cleanupInterval):
+			err := doClean(maxItems, db, store, stopper)
+			if err != nil {
+				log.Error(errors.FullTrace(err))
+			}
+		}
+	}
+}
+
+func doClean(maxItems int, db *db.SQL, store store.BlobStore, stopper *stop.Group) error {
+	blobsCount, err := db.Count()
+	if err != nil {
+		return err
+	}
+
+	if blobsCount >= maxItems {
+		itemsToDelete := blobsCount / 10
+		blobs, err := db.LeastRecentlyAccessedHashes(itemsToDelete)
+		if err != nil {
+			return err
+		}
+		blobsChan := make(chan string, len(blobs))
+		wg := &stop.Group{}
+		go func() {
+			for _, hash := range blobs {
+				select {
+				case <-stopper.Ch():
+					return
+				default:
+				}
+				blobsChan <- hash
+			}
+			close(blobsChan)
+		}()
+		for i := 0; i < 3; i++ {
+			wg.Add(1)
+			go func() {
+				defer wg.Done()
+				for h := range blobsChan {
+					select {
+					case <-stopper.Ch():
+						return
+					default:
+					}
+					err = store.Delete(h)
+					if err != nil {
+						log.Errorf("error pruning %s: %s", h, errors.FullTrace(err))
+						continue
+					}
+				}
+			}()
+		}
+		wg.Wait()
+	}
+	return nil
 }

cmd/root.go

@@ -163,3 +163,9 @@ func mustGetFlagInt64(cmd *cobra.Command, name string) int64 {
 	checkErr(err)
 	return v
 }
+
+func mustGetFlagBool(cmd *cobra.Command, name string) bool {
+	v, err := cmd.Flags().GetBool(name)
+	checkErr(err)
+	return v
+}

cmd/send.go

@@ -0,0 +1,160 @@
+package cmd
+
+import (
+	"encoding/hex"
+	"encoding/json"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"os"
+	"os/signal"
+	"path"
+	"syscall"
+
+	"github.com/lbryio/reflector.go/reflector"
+
+	"github.com/lbryio/lbry.go/v2/extras/errors"
+	"github.com/lbryio/lbry.go/v2/stream"
+
+	"github.com/spf13/cobra"
+)
+
+func init() {
+	var cmd = &cobra.Command{
+		Use:   "send ADDRESS:PORT PATH",
+		Short: "Send a file to a reflector",
+		Args:  cobra.ExactArgs(2),
+		Run:   sendCmd,
+	}
+	cmd.PersistentFlags().String("sd-cache", "", "path to dir where sd blobs will be cached")
+	rootCmd.AddCommand(cmd)
+}
+
+// todo: if retrying a large file is slow, we can add the ability to seek ahead in the file so we're not
+// re-uploading blobs that already exist
+
+var hackyReflector reflector.Client
+
+func sendCmd(cmd *cobra.Command, args []string) {
+	reflectorAddress := args[0]
+	err := hackyReflector.Connect(reflectorAddress)
+	checkErr(err)
+	defer hackyReflector.Close()
+
+	filePath := args[1]
+	file, err := os.Open(filePath)
+	checkErr(err)
+	defer file.Close()
+
+	sdCachePath := ""
+	sdCacheDir := mustGetFlagString(cmd, "sd-cache")
+	if sdCacheDir != "" {
+		if _, err := os.Stat(sdCacheDir); os.IsNotExist(err) {
+			err = os.MkdirAll(sdCacheDir, 0777)
+			checkErr(err)
+		}
+		sdCachePath = path.Join(sdCacheDir, filePath+".sdblob")
+	}
+
+	var enc *stream.Encoder
+
+	if sdCachePath != "" {
+		if _, err := os.Stat(sdCachePath); !os.IsNotExist(err) {
+			sdBlob, err := ioutil.ReadFile(sdCachePath)
+			checkErr(err)
+			cachedSDBlob := &stream.SDBlob{}
+			err = cachedSDBlob.FromBlob(sdBlob)
+			checkErr(err)
+			enc = stream.NewEncoderFromSD(file, cachedSDBlob)
+		}
+	}
+	if enc == nil {
+		enc = stream.NewEncoder(file)
+	}
+
+	exitCode := 0
+
+	var killed bool
+	interruptChan := make(chan os.Signal, 1)
+	signal.Notify(interruptChan, os.Interrupt, syscall.SIGTERM)
+	go func() {
+		sig := <-interruptChan
+		fmt.Printf("caught %s, exiting...\n", sig.String())
+		killed = true
+		exitCode = 1
+	}()
+
+	for {
+		if killed {
+			break
+		}
+
+		b, err := enc.Next()
+		if errors.Is(err, io.EOF) {
+			break
+		}
+		if err != nil {
+			fmt.Printf("error reading next blob: %v\n", err)
+			exitCode = 1
+			break
+		}
+
+		err = hackyReflect(b, false)
+		if err != nil {
+			fmt.Printf("error reflecting blob %s: %v\n", b.HashHex()[:8], err)
+			exitCode = 1
+			break
+		}
+	}
+
+	sd := enc.SDBlob()
+	//sd.StreamName = filepath.Base(filePath)
+	//sd.SuggestedFileName = filepath.Base(filePath)
+	err = ioutil.WriteFile(sdCachePath, sd.ToBlob(), 0666)
+	if err != nil {
+		fmt.Printf("error saving sd blob: %v\n", err)
+		fmt.Println(sd.ToJson())
+		exitCode = 1
+	}
+
+	if killed {
+		os.Exit(exitCode)
+	}
+
+	if reflectorAddress != "" {
+		err = hackyReflect(sd.ToBlob(), true)
+		if err != nil {
+			fmt.Printf("error reflecting sd blob %s: %v\n", sd.HashHex()[:8], err)
+			exitCode = 1
+		}
+	}
+
+	ret := struct {
+		SDHash     string `json:"sd_hash"`
+		SourceHash string `json:"source_hash"`
+	}{
+		SDHash:     sd.HashHex(),
+		SourceHash: hex.EncodeToString(enc.SourceHash()),
+	}
+
+	j, err := json.MarshalIndent(ret, "", "  ")
+	checkErr(err)
+	fmt.Println(string(j))
+	os.Exit(exitCode)
+}
+
+func hackyReflect(b stream.Blob, sd bool) error {
+	var err error
+	if sd {
+		err = hackyReflector.SendSDBlob(b)
+	} else {
+		err = hackyReflector.SendBlob(b)
+	}
+
+	if errors.Is(err, reflector.ErrBlobExists) {
+		//fmt.Printf("%s already reflected\n", b.HashHex()[:8])
+		return nil
+	}
+
+	return err
+}

cmd/sendblob.go

@@ -2,7 +2,6 @@ package cmd
 
 import (
 	"crypto/rand"
-	"io/ioutil"
 	"os"
 
 	"github.com/lbryio/reflector.go/reflector"
@@ -52,9 +51,8 @@ func sendBlobCmd(cmd *cobra.Command, args []string) {
 
 	file, err := os.Open(path)
 	checkErr(err)
-	data, err := ioutil.ReadAll(file)
+	defer file.Close()
-	checkErr(err)
+	s, err := stream.New(file)
-	s, err := stream.New(data)
 	checkErr(err)
 
 	sdBlob := &stream.SDBlob{}

cmd/start.go

@@ -52,11 +52,13 @@ func init() {
 }
 
 func startCmd(cmd *cobra.Command, args []string) {
-	db := new(db.SQL)
+	db := &db.SQL{
+		LogQueries: log.GetLevel() == log.DebugLevel,
+	}
 	err := db.Connect(globalConfig.DBConn)
 	checkErr(err)
 	s3 := store.NewS3Store(globalConfig.AwsID, globalConfig.AwsSecret, globalConfig.BucketRegion, globalConfig.BucketName)
-	comboStore := store.NewDBBackedStore(s3, db)
+	comboStore := store.NewDBBackedStore(s3, db, false)
 
 	conf := prism.DefaultConf()
 

cmd/test.go

@@ -31,7 +31,7 @@ func testCmd(cmd *cobra.Command, args []string) {
 
 	memStore := store.NewMemStore()
 
-	reflectorServer := reflector.NewServer(memStore)
+	reflectorServer := reflector.NewServer(memStore, memStore)
 	reflectorServer.Timeout = 3 * time.Minute
 
 	err := reflectorServer.Start(":" + strconv.Itoa(reflector.DefaultPort))

cmd/upload.go

@@ -8,6 +8,7 @@ import (
 	"github.com/lbryio/reflector.go/db"
 	"github.com/lbryio/reflector.go/reflector"
 	"github.com/lbryio/reflector.go/store"
+	log "github.com/sirupsen/logrus"
 
 	"github.com/spf13/cobra"
 )
@@ -30,13 +31,15 @@ func init() {
 }
 
 func uploadCmd(cmd *cobra.Command, args []string) {
-	db := new(db.SQL)
+	db := &db.SQL{
+		LogQueries: log.GetLevel() == log.DebugLevel,
+	}
 	err := db.Connect(globalConfig.DBConn)
 	checkErr(err)
 
 	st := store.NewDBBackedStore(
 		store.NewS3Store(globalConfig.AwsID, globalConfig.AwsSecret, globalConfig.BucketRegion, globalConfig.BucketName),
-		db)
+		db, false)
 
 	uploader := reflector.NewUploader(db, st, uploadWorkers, uploadSkipExistsCheck, uploadDeleteBlobsAfterUpload)
 

db/db.go

@@ -3,16 +3,22 @@ package db
 import (
 	"context"
 	"database/sql"
+	"fmt"
+	"runtime"
+	"strings"
 	"time"
 
 	"github.com/lbryio/lbry.go/v2/dht/bits"
 	"github.com/lbryio/lbry.go/v2/extras/errors"
 	qt "github.com/lbryio/lbry.go/v2/extras/query"
+	"github.com/lbryio/lbry.go/v2/extras/stop"
+	"github.com/lbryio/lbry.go/v2/stream"
 
 	"github.com/go-sql-driver/mysql"
 	_ "github.com/go-sql-driver/mysql" // blank import for db driver ensures its imported even if its not used
 	log "github.com/sirupsen/logrus"
 	"github.com/volatiletech/null"
+	"go.uber.org/atomic"
 )
 
 // SdBlob is a special blob that contains information on the rest of the blobs in the stream
@@ -30,19 +36,41 @@ type SdBlob struct {
 	StreamHash        string `json:"stream_hash"`
 }
 
+type trackAccess int
+
+const (
+	// Don't track accesses
+	TrackAccessNone trackAccess = iota
+	// Track accesses at the stream level
+	TrackAccessStreams
+	// Track accesses at the blob level
+	TrackAccessBlobs
+)
+
 // SQL implements the DB interface
 type SQL struct {
 	conn *sql.DB
 
-	TrackAccessTime bool
+	// Track the approx last time a blob or stream was accessed
+	TrackAccess trackAccess
+
+	// Instead of deleting a blob, marked it as not stored in the db
+	SoftDelete bool
+
+	// Log executed queries. qt.InterpolateParams is cpu-heavy. This avoids that call if not needed.
+	LogQueries bool
 }
 
-func logQuery(query string, args ...interface{}) {
+func (s SQL) logQuery(query string, args ...interface{}) {
-	s, err := qt.InterpolateParams(query, args...)
+	if !s.LogQueries {
+		return
+	}
+
+	qStr, err := qt.InterpolateParams(query, args...)
 	if err != nil {
 		log.Errorln(err)
 	} else {
-		log.Debugln(s)
+		log.Debugln(qStr)
 	}
 }
 
@@ -69,43 +97,137 @@ func (s *SQL) AddBlob(hash string, length int, isStored bool) error {
 		return errors.Err("not connected")
 	}
 
-	_, err := s.insertBlob(hash, length, isStored)
+	_, err := s.insertBlob(s.conn, hash, length, isStored)
 	return err
 }
 
-func (s *SQL) insertBlob(hash string, length int, isStored bool) (int64, error) {
+// AddBlob adds a blob to the database.
+func (s *SQL) AddBlobs(hash []string) error {
+	if s.conn == nil {
+		return errors.Err("not connected")
+	}
+	// Split the slice into batches of 20 items.
+	batch := 10000
+	totalBlobs := int64(len(hash))
+	work := make(chan []string, 1000)
+	stopper := stop.New()
+	var totalInserted atomic.Int64
+	start := time.Now()
+	go func() {
+		for i := 0; i < len(hash); i += batch {
+			j := i + batch
+			if j > len(hash) {
+				j = len(hash)
+			}
+			work <- hash[i:j]
+		}
+		log.Infof("done loading %d hashes in the work queue", len(hash))
+		close(work)
+	}()
+	for i := 0; i < runtime.NumCPU(); i++ {
+		stopper.Add(1)
+		go func(worker int) {
+			log.Infof("starting worker %d", worker)
+			defer stopper.Done()
+			for hashes := range work {
+				inserted := totalInserted.Load()
+				remaining := totalBlobs - inserted
+				if inserted > 0 {
+					timePerBlob := time.Since(start).Microseconds() / inserted
+					remainingTime := time.Duration(remaining*timePerBlob) * time.Microsecond
+					log.Infof("[T%d] processing batch of %d items. ETA: %s", worker, len(hashes), remainingTime.String())
+				}
+				err := s.insertBlobs(hashes) // Process the batch.
+				if err != nil {
+					log.Errorf("error while inserting batch: %s", errors.FullTrace(err))
+				}
+				totalInserted.Add(int64(len(hashes)))
+			}
+		}(i)
+	}
+	stopper.Wait()
+	return nil
+}
+
+func (s *SQL) insertBlobs(hashes []string) error {
+	var (
+		q string
+		//args []interface{}
+	)
+	dayAgo := time.Now().AddDate(0, 0, -1).Format("2006-01-02 15:04:05")
+	q = "insert into blob_ (hash, is_stored, length, last_accessed_at) values "
+	for _, hash := range hashes {
+		// prepared statements slow everything down by a lot due to reflection
+		// for this specific instance we'll go ahead and hardcode the query to make it go faster
+		q += fmt.Sprintf("('%s',1,%d,'%s'),", hash, stream.MaxBlobSize, dayAgo)
+		//args = append(args, hash, true, stream.MaxBlobSize, dayAgo)
+	}
+	q = strings.TrimSuffix(q, ",")
+	_, err := s.exec(s.conn, q)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func (s *SQL) insertBlob(ex Executor, hash string, length int, isStored bool) (int64, error) {
 	if length <= 0 {
 		return 0, errors.Err("length must be positive")
 	}
 
-	args := []interface{}{hash, isStored, length}
+	var (
-	blobID, err := s.exec(
+		q    string
-		"INSERT INTO blob_ (hash, is_stored, length) VALUES ("+qt.Qs(len(args))+") ON DUPLICATE KEY UPDATE is_stored = (is_stored or VALUES(is_stored))",
+		args []interface{}
-		args...,
 	)
+	if s.TrackAccess == TrackAccessBlobs {
+		args = []interface{}{hash, isStored, length, time.Now()}
+		q = "INSERT INTO blob_ (hash, is_stored, length, last_accessed_at) VALUES (" + qt.Qs(len(args)) + ") ON DUPLICATE KEY UPDATE is_stored = (is_stored or VALUES(is_stored)), last_accessed_at = VALUES(last_accessed_at)"
+	} else {
+		args = []interface{}{hash, isStored, length}
+		q = "INSERT INTO blob_ (hash, is_stored, length) VALUES (" + qt.Qs(len(args)) + ") ON DUPLICATE KEY UPDATE is_stored = (is_stored or VALUES(is_stored))"
+	}
+
+	blobID, err := s.exec(ex, q, args...)
 	if err != nil {
 		return 0, err
 	}
 
 	if blobID == 0 {
-		err = s.conn.QueryRow("SELECT id FROM blob_ WHERE hash = ?", hash).Scan(&blobID)
+		err = ex.QueryRow("SELECT id FROM blob_ WHERE hash = ?", hash).Scan(&blobID)
 		if err != nil {
 			return 0, errors.Err(err)
 		}
 		if blobID == 0 {
 			return 0, errors.Err("blob ID is 0 even after INSERTing and SELECTing")
 		}
+
+		if s.TrackAccess == TrackAccessBlobs {
+			err := s.touchBlobs(ex, []uint64{uint64(blobID)})
+			if err != nil {
+				return 0, errors.Err(err)
+			}
+		}
 	}
 
 	return blobID, nil
 }
 
 func (s *SQL) insertStream(hash string, sdBlobID int64) (int64, error) {
-	args := []interface{}{hash, sdBlobID, time.Now()}
+	var (
-	streamID, err := s.exec(
+		q    string
-		"INSERT IGNORE INTO stream (hash, sd_blob_id, last_accessed_at) VALUES ("+qt.Qs(len(args))+")",
+		args []interface{}
-		args...,
 	)
+
+	if s.TrackAccess == TrackAccessStreams {
+		args = []interface{}{hash, sdBlobID, time.Now()}
+		q = "INSERT IGNORE INTO stream (hash, sd_blob_id, last_accessed_at) VALUES (" + qt.Qs(len(args)) + ")"
+	} else {
+		args = []interface{}{hash, sdBlobID}
+		q = "INSERT IGNORE INTO stream (hash, sd_blob_id) VALUES (" + qt.Qs(len(args)) + ")"
+	}
+
+	streamID, err := s.exec(s.conn, q, args...)
 	if err != nil {
 		return 0, errors.Err(err)
 	}
@@ -119,8 +241,8 @@ func (s *SQL) insertStream(hash string, sdBlobID int64) (int64, error) {
 			return 0, errors.Err("stream ID is 0 even after INSERTing and SELECTing")
 		}
 
-		if s.TrackAccessTime {
+		if s.TrackAccess == TrackAccessStreams {
-			err := s.touch([]uint64{uint64(streamID)})
+			err := s.touchStreams([]uint64{uint64(streamID)})
 			if err != nil {
 				return 0, errors.Err(err)
 			}
@@ -130,8 +252,8 @@ func (s *SQL) insertStream(hash string, sdBlobID int64) (int64, error) {
 }
 
 // HasBlob checks if the database contains the blob information.
-func (s *SQL) HasBlob(hash string) (bool, error) {
+func (s *SQL) HasBlob(hash string, touch bool) (bool, error) {
-	exists, err := s.HasBlobs([]string{hash})
+	exists, err := s.HasBlobs([]string{hash}, touch)
 	if err != nil {
 		return false, err
 	}
@@ -139,13 +261,39 @@ func (s *SQL) HasBlob(hash string) (bool, error) {
 }
 
 // HasBlobs checks if the database contains the set of blobs and returns a bool map.
-func (s *SQL) HasBlobs(hashes []string) (map[string]bool, error) {
+func (s *SQL) HasBlobs(hashes []string, touch bool) (map[string]bool, error) {
-	exists, streamsNeedingTouch, err := s.hasBlobs(hashes)
+	exists, idsNeedingTouch, err := s.hasBlobs(hashes)
-	s.touch(streamsNeedingTouch)
+
+	if touch {
+		if s.TrackAccess == TrackAccessBlobs {
+			_ = s.touchBlobs(s.conn, idsNeedingTouch)
+		} else if s.TrackAccess == TrackAccessStreams {
+			_ = s.touchStreams(idsNeedingTouch)
+		}
+	}
+
 	return exists, err
 }
 
-func (s *SQL) touch(streamIDs []uint64) error {
+func (s *SQL) touchBlobs(ex Executor, blobIDs []uint64) error {
+	if len(blobIDs) == 0 {
+		return nil
+	}
+
+	query := "UPDATE blob_ SET last_accessed_at = ? WHERE id IN (" + qt.Qs(len(blobIDs)) + ")"
+	args := make([]interface{}, len(blobIDs)+1)
+	args[0] = time.Now()
+	for i := range blobIDs {
+		args[i+1] = blobIDs[i]
+	}
+
+	startTime := time.Now()
+	_, err := s.exec(ex, query, args...)
+	log.Debugf("touched %d blobs and took %s", len(blobIDs), time.Since(startTime))
+	return errors.Err(err)
+}
+
+func (s *SQL) touchStreams(streamIDs []uint64) error {
 	if len(streamIDs) == 0 {
 		return nil
 	}
@@ -158,8 +306,8 @@ func (s *SQL) touch(streamIDs []uint64) error {
 	}
 
 	startTime := time.Now()
-	_, err := s.exec(query, args...)
+	_, err := s.exec(s.conn, query, args...)
-	log.Debugf("stream access query touched %d streams and took %s", len(streamIDs), time.Since(startTime))
+	log.Debugf("touched %d streams and took %s", len(streamIDs), time.Since(startTime))
 	return errors.Err(err)
 }
 
@@ -170,14 +318,15 @@ func (s *SQL) hasBlobs(hashes []string) (map[string]bool, []uint64, error) {
 
 	var (
 		hash           string
-		streamID       uint64
+		blobID         uint64
+		streamID       null.Uint64
 		lastAccessedAt null.Time
 	)
 
 	var needsTouch []uint64
 	exists := make(map[string]bool)
 
-	touchDeadline := time.Now().AddDate(0, 0, -1) // touch blob if last accessed before this time
+	touchDeadline := time.Now().Add(-6 * time.Hour) // touch blob if last accessed before this time
 	maxBatchSize := 10000
 	doneIndex := 0
 
@@ -189,20 +338,29 @@ func (s *SQL) hasBlobs(hashes []string) (map[string]bool, []uint64, error) {
 		log.Debugf("getting hashes[%d:%d] of %d", doneIndex, sliceEnd, len(hashes))
 		batch := hashes[doneIndex:sliceEnd]
 
-		// TODO: this query doesn't work for SD blobs, which are not in the stream_blob table
+		var query string
-
+		if s.TrackAccess == TrackAccessBlobs {
-		query := `SELECT b.hash, s.id, s.last_accessed_at
+			query = `SELECT b.hash, b.id, NULL, b.last_accessed_at
+FROM blob_ b
+WHERE b.is_stored = 1 and b.hash IN (` + qt.Qs(len(batch)) + `)`
+		} else if s.TrackAccess == TrackAccessStreams {
+			query = `SELECT b.hash, b.id, s.id, s.last_accessed_at
 FROM blob_ b
 LEFT JOIN stream_blob sb ON b.id = sb.blob_id
 INNER JOIN stream s on (sb.stream_id = s.id or s.sd_blob_id = b.id)
-WHERE b.is_stored = ? and b.hash IN (` + qt.Qs(len(batch)) + `)`
+WHERE b.is_stored = 1 and b.hash IN (` + qt.Qs(len(batch)) + `)`
-		args := make([]interface{}, len(batch)+1)
+		} else {
-		args[0] = true
+			query = `SELECT b.hash, b.id, NULL, NULL
-		for i := range batch {
+FROM blob_ b
-			args[i+1] = batch[i]
+WHERE b.is_stored = 1 and b.hash IN (` + qt.Qs(len(batch)) + `)`
 		}
 
-		logQuery(query, args...)
+		args := make([]interface{}, len(batch))
+		for i := range batch {
+			args[i] = batch[i]
+		}
+
+		s.logQuery(query, args...)
 
 		err := func() error {
 			startTime := time.Now()
@@ -214,13 +372,17 @@ WHERE b.is_stored = ? and b.hash IN (` + qt.Qs(len(batch)) + `)`
 			defer closeRows(rows)
 
 			for rows.Next() {
-				err := rows.Scan(&hash, &streamID, &lastAccessedAt)
+				err := rows.Scan(&hash, &blobID, &streamID, &lastAccessedAt)
 				if err != nil {
 					return errors.Err(err)
 				}
 				exists[hash] = true
-				if s.TrackAccessTime && (!lastAccessedAt.Valid || lastAccessedAt.Time.Before(touchDeadline)) {
+				if !lastAccessedAt.Valid || lastAccessedAt.Time.Before(touchDeadline) {
-					needsTouch = append(needsTouch, streamID)
+					if s.TrackAccess == TrackAccessBlobs {
+						needsTouch = append(needsTouch, blobID)
+					} else if s.TrackAccess == TrackAccessStreams && !streamID.IsZero() {
+						needsTouch = append(needsTouch, streamID.Uint64)
+					}
 				}
 			}
 
@@ -240,22 +402,110 @@ WHERE b.is_stored = ? and b.hash IN (` + qt.Qs(len(batch)) + `)`
 	return exists, needsTouch, nil
 }
 
-// Delete will remove the blob from the db
+// Delete will remove (or soft-delete) the blob from the db
+// NOTE: If SoftDelete is enabled, streams will never be deleted
 func (s *SQL) Delete(hash string) error {
-	_, err := s.exec("DELETE FROM stream WHERE sd_blob_id = (SELECT id FROM blob_ WHERE hash = ?)", hash)
+	if s.SoftDelete {
+		_, err := s.exec(s.conn, "UPDATE blob_ SET is_stored = 0 WHERE hash = ?", hash)
+		return errors.Err(err)
+	}
+
+	_, err := s.exec(s.conn, "DELETE FROM stream WHERE sd_blob_id = (SELECT id FROM blob_ WHERE hash = ?)", hash)
 	if err != nil {
 		return errors.Err(err)
 	}
 
-	_, err = s.exec("DELETE FROM blob_ WHERE hash = ?", hash)
+	_, err = s.exec(s.conn, "DELETE FROM blob_ WHERE hash = ?", hash)
 	return errors.Err(err)
 }
 
+// GetHashRange gets the smallest and biggest hashes in the db
+func (s *SQL) LeastRecentlyAccessedHashes(maxBlobs int) ([]string, error) {
+	if s.conn == nil {
+		return nil, errors.Err("not connected")
+	}
+
+	if s.TrackAccess != TrackAccessBlobs {
+		return nil, errors.Err("blob access tracking is disabled")
+	}
+
+	query := "SELECT hash from blob_ where is_stored = 1 order by last_accessed_at limit ?"
+	s.logQuery(query, maxBlobs)
+
+	rows, err := s.conn.Query(query, maxBlobs)
+	if err != nil {
+		return nil, errors.Err(err)
+	}
+	defer closeRows(rows)
+
+	blobs := make([]string, 0, maxBlobs)
+	for rows.Next() {
+		var hash string
+		err := rows.Scan(&hash)
+		if err != nil {
+			return nil, errors.Err(err)
+		}
+		blobs = append(blobs, hash)
+	}
+
+	return blobs, nil
+}
+
+// AllHashes writes all hashes from the db into the channel.
+// It does not close the channel when it finishes.
+//func (s *SQL) AllHashes(ch chan<- string) error {
+//	if s.conn == nil {
+//		return errors.Err("not connected")
+//	}
+//
+//	query := "SELECT hash from blob_"
+//	if s.SoftDelete {
+//		query += " where is_stored = 1"
+//	}
+//	s.logQuery(query)
+//
+//	rows, err := s.conn.Query(query)
+//	if err != nil {
+//		return errors.Err(err)
+//	}
+//	defer closeRows(rows)
+//
+//	for rows.Next() {
+//		var hash string
+//		err := rows.Scan(&hash)
+//		if err != nil {
+//			return errors.Err(err)
+//		}
+//		ch <- hash
+//      // TODO: this needs testing
+//		// TODO: need a way to cancel this early (e.g. in case of shutdown)
+//	}
+//
+//	close(ch)
+//	return nil
+//}
+
+func (s *SQL) Count() (int, error) {
+	if s.conn == nil {
+		return 0, errors.Err("not connected")
+	}
+
+	query := "SELECT count(id) from blob_"
+	if s.SoftDelete {
+		query += " where is_stored = 1"
+	}
+	s.logQuery(query)
+
+	var count int
+	err := s.conn.QueryRow(query).Scan(&count)
+	return count, errors.Err(err)
+}
+
 // Block will mark a blob as blocked
 func (s *SQL) Block(hash string) error {
 	query := "INSERT IGNORE INTO blocked SET hash = ?"
 	args := []interface{}{hash}
-	logQuery(query, args...)
+	s.logQuery(query, args...)
 	_, err := s.conn.Exec(query, args...)
 	return errors.Err(err)
 }
@@ -263,7 +513,7 @@ func (s *SQL) Block(hash string) error {
 // GetBlocked will return a list of blocked hashes
 func (s *SQL) GetBlocked() (map[string]bool, error) {
 	query := "SELECT hash FROM blocked"
-	logQuery(query)
+	s.logQuery(query)
 	rows, err := s.conn.Query(query)
 	if err != nil {
 		return nil, errors.Err(err)
@@ -306,7 +556,7 @@ func (s *SQL) MissingBlobsForKnownStream(sdHash string) ([]string, error) {
 	`
 	args := []interface{}{sdHash}
 
-	logQuery(query, args...)
+	s.logQuery(query, args...)
 
 	rows, err := s.conn.Query(query, args...)
 	if err != nil {
@@ -340,7 +590,7 @@ func (s *SQL) AddSDBlob(sdHash string, sdBlobLength int, sdBlob SdBlob) error {
 		return errors.Err("not connected")
 	}
 
-	sdBlobID, err := s.insertBlob(sdHash, sdBlobLength, true)
+	sdBlobID, err := s.insertBlob(s.conn, sdHash, sdBlobLength, true)
 	if err != nil {
 		return err
 	}
@@ -350,6 +600,7 @@ func (s *SQL) AddSDBlob(sdHash string, sdBlobLength int, sdBlob SdBlob) error {
 		return err
 	}
 
+	return withTx(s.conn, func(tx Transactor) error {
 		// insert content blobs and connect them to stream
 		for _, contentBlob := range sdBlob.Blobs {
 			if contentBlob.BlobHash == "" {
@@ -357,13 +608,13 @@ func (s *SQL) AddSDBlob(sdHash string, sdBlobLength int, sdBlob SdBlob) error {
 				continue
 			}
 
-		blobID, err := s.insertBlob(contentBlob.BlobHash, contentBlob.Length, false)
+			blobID, err := s.insertBlob(tx, contentBlob.BlobHash, contentBlob.Length, false)
 			if err != nil {
 				return err
 			}
 
 			args := []interface{}{streamID, blobID, contentBlob.BlobNum}
-		_, err = s.exec(
+			_, err = s.exec(tx,
 				"INSERT IGNORE INTO stream_blob (stream_id, blob_id, num) VALUES ("+qt.Qs(len(args))+")",
 				args...,
 			)
@@ -372,6 +623,7 @@ func (s *SQL) AddSDBlob(sdHash string, sdBlobLength int, sdBlob SdBlob) error {
 			}
 		}
 		return nil
+	})
 }
 
 // GetHashRange gets the smallest and biggest hashes in the db
@@ -385,7 +637,7 @@ func (s *SQL) GetHashRange() (string, string, error) {
 
 	query := "SELECT MIN(hash), MAX(hash) from blob_"
 
-	logQuery(query)
+	s.logQuery(query)
 
 	err := s.conn.QueryRow(query).Scan(&min, &max)
 	return min, max, err
@@ -409,7 +661,7 @@ func (s *SQL) GetStoredHashesInRange(ctx context.Context, start, end bits.Bitmap
 		query := "SELECT hash FROM blob_ WHERE hash >= ? AND hash <= ? AND is_stored = 1"
 		args := []interface{}{start.Hex(), end.Hex()}
 
-		logQuery(query, args...)
+		s.logQuery(query, args...)
 
 		rows, err := s.conn.Query(query, args...)
 		defer closeRows(rows)
@@ -444,38 +696,37 @@ func (s *SQL) GetStoredHashesInRange(ctx context.Context, start, end bits.Bitmap
 }
 
 // txFunc is a function that can be wrapped in a transaction
-type txFunc func(tx *sql.Tx) error
+type txFunc func(tx Transactor) error
 
-// withTx wraps a function in an sql transaction. the transaction is committed if there's no error, or rolled back if there is one.
+// withTx wraps a function in an sql transaction. the transaction is committed if there's
-// if dbOrTx is an sql.DB, a new transaction is started
+// no error, or rolled back if there is one. if dbOrTx is not a Transactor (e.g. if it's
+// an *sql.DB), withTx attempts to start a new transaction to use.
 func withTx(dbOrTx interface{}, f txFunc) (err error) {
-	var tx *sql.Tx
+	var tx Transactor
+	var ok bool
 
-	switch t := dbOrTx.(type) {
+	tx, ok = dbOrTx.(Transactor)
-	case *sql.Tx:
+	if !ok {
-		tx = t
+		tx, err = Begin(dbOrTx)
-	case *sql.DB:
-		tx, err = t.Begin()
 		if err != nil {
 			return err
 		}
+	}
+
 	defer func() {
 		if p := recover(); p != nil {
 			if rollBackError := tx.Rollback(); rollBackError != nil {
-					log.Error("failed to rollback tx on panic - ", rollBackError)
+				log.Error("failed to rollback tx on panic: ", rollBackError)
 			}
-				panic(p)
+			err = errors.Prefix("panic", p)
 		} else if err != nil {
 			if rollBackError := tx.Rollback(); rollBackError != nil {
-					log.Error("failed to rollback tx on panic - ", rollBackError)
+				log.Error("failed to rollback tx: ", rollBackError)
 			}
 		} else {
 			err = errors.Err(tx.Commit())
 		}
 	}()
-	default:
-		return errors.Err("db or tx required")
-	}
 
 	return f(tx)
 }
@@ -489,12 +740,12 @@ func closeRows(rows *sql.Rows) {
 	}
 }
 
-func (s *SQL) exec(query string, args ...interface{}) (int64, error) {
+func (s *SQL) exec(ex Executor, query string, args ...interface{}) (int64, error) {
-	logQuery(query, args...)
+	s.logQuery(query, args...)
 	attempt, maxAttempts := 0, 3
 Retry:
 	attempt++
-	result, err := s.conn.Exec(query, args...)
+	result, err := ex.Exec(query, args...)
 	if isLockTimeoutError(err) {
 		if attempt <= maxAttempts {
 			//Error 1205: Lock wait timeout exceeded; try restarting transaction
@@ -528,8 +779,11 @@ CREATE TABLE blob_ (
   hash char(96) NOT NULL,
   is_stored TINYINT(1) NOT NULL DEFAULT 0,
   length bigint(20) unsigned DEFAULT NULL,
+  last_accessed_at TIMESTAMP NULL DEFAULT NULL,
   PRIMARY KEY (id),
-  UNIQUE KEY blob_hash_idx (hash)
+  UNIQUE KEY blob_hash_idx (hash),
+  KEY `blob_last_accessed_idx` (`last_accessed_at`),
+  KEY `is_stored_idx` (`is_stored`)
 );
 
 CREATE TABLE stream (
@@ -560,3 +814,47 @@ CREATE TABLE blocked (
 );
 
 */
+
+//func (d *LiteDBBackedStore) selfClean() {
+//	d.stopper.Add(1)
+//	defer d.stopper.Done()
+//	lastCleanup := time.Now()
+//	const cleanupInterval = 10 * time.Second
+//	for {
+//		select {
+//		case <-d.stopper.Ch():
+//			log.Infoln("stopping self cleanup")
+//			return
+//		default:
+//			time.Sleep(1 * time.Second)
+//		}
+//		if time.Since(lastCleanup) < cleanupInterval {
+//			continue
+//
+//		blobsCount, err := d.db.BlobsCount()
+//		if err != nil {
+//			log.Errorf(errors.FullTrace(err))
+//		}
+//		if blobsCount >= d.maxItems {
+//			itemsToDelete := blobsCount / 100 * 10
+//			blobs, err := d.db.GetLRUBlobs(itemsToDelete)
+//			if err != nil {
+//				log.Errorf(errors.FullTrace(err))
+//			}
+//			for _, hash := range blobs {
+//				select {
+//				case <-d.stopper.Ch():
+//					return
+//				default:
+//
+//				}
+//				err = d.Delete(hash)
+//				if err != nil {
+//					log.Errorf(errors.FullTrace(err))
+//				}
+//				metrics.CacheLRUEvictCount.With(metrics.CacheLabels(d.Name(), d.component)).Inc()
+//			}
+//		}
+//		lastCleanup = time.Now()
+//	}
+//}

db/interfaces.go

@@ -0,0 +1,45 @@
+package db
+
+import (
+	"database/sql"
+
+	"github.com/lbryio/lbry.go/v2/extras/errors"
+)
+
+// Executor can perform SQL queries.
+type Executor interface {
+	Exec(query string, args ...interface{}) (sql.Result, error)
+	Query(query string, args ...interface{}) (*sql.Rows, error)
+	QueryRow(query string, args ...interface{}) *sql.Row
+}
+
+// Transactor can commit and rollback, on top of being able to execute queries.
+type Transactor interface {
+	Commit() error
+	Rollback() error
+
+	Executor
+}
+
+// Begin begins a transaction
+func Begin(db interface{}) (Transactor, error) {
+	type beginner interface {
+		Begin() (Transactor, error)
+	}
+
+	creator, ok := db.(beginner)
+	if ok {
+		return creator.Begin()
+	}
+
+	type sqlBeginner interface {
+		Begin() (*sql.Tx, error)
+	}
+
+	creator2, ok := db.(sqlBeginner)
+	if ok {
+		return creator2.Begin()
+	}
+
+	return nil, errors.Err("database does not support transactions")
+}

go.mod

@@ -2,19 +2,24 @@ module github.com/lbryio/reflector.go
 
 replace github.com/btcsuite/btcd => github.com/lbryio/lbrycrd.go v0.0.0-20200203050410-e1076f12bf19
 
+//replace github.com/lbryio/lbry.go/v2 => ../lbry.go
+
 require (
 	github.com/armon/go-metrics v0.0.0-20190430140413-ec5e00d3c878 // indirect
 	github.com/aws/aws-sdk-go v1.16.11
+	github.com/bluele/gcache v0.0.2
+	github.com/bparli/lfuda-go v0.3.1
 	github.com/btcsuite/btcd v0.0.0-20190824003749-130ea5bddde3
 	github.com/btcsuite/btcutil v0.0.0-20190425235716-9e5f4b9a998d
+	github.com/c2h5oh/datasize v0.0.0-20200825124411-48ed595a09d2
 	github.com/davecgh/go-spew v1.1.1
+	github.com/gin-gonic/gin v1.7.1
 	github.com/go-sql-driver/mysql v1.4.1
 	github.com/golang/protobuf v1.4.2
-	github.com/google/btree v1.0.0 // indirect
+	github.com/google/gops v0.3.18
-	github.com/google/gops v0.3.7
 	github.com/gorilla/mux v1.7.4
 	github.com/hashicorp/go-msgpack v0.5.5 // indirect
-	github.com/hashicorp/golang-lru v0.5.4
+	github.com/hashicorp/golang-lru v0.5.4 // indirect
 	github.com/hashicorp/memberlist v0.1.4 // indirect
 	github.com/hashicorp/serf v0.8.2
 	github.com/inconshreveable/go-update v0.0.0-20160112193335-8152e7eb6ccf
@@ -22,25 +27,23 @@ require (
 	github.com/karrick/godirwalk v1.16.1
 	github.com/lbryio/chainquery v1.9.0
 	github.com/lbryio/lbry.go v1.1.2 // indirect
-	github.com/lbryio/lbry.go/v2 v2.6.1-0.20200901175808-73382bb02128
+	github.com/lbryio/lbry.go/v2 v2.7.2-0.20210416195322-6516df1418e3
-	github.com/lbryio/types v0.0.0-20191228214437-05a22073b4ec
+	github.com/lbryio/types v0.0.0-20201019032447-f0b4476ef386
-	github.com/lucas-clemente/quic-go v0.18.1
+	github.com/lucas-clemente/quic-go v0.20.1
 	github.com/phayes/freeport v0.0.0-20171002185219-e27662a4a9d6
-	github.com/prometheus/client_golang v0.9.2
+	github.com/prometheus/client_golang v0.9.3
 	github.com/sirupsen/logrus v1.4.2
-	github.com/spf13/afero v1.4.1
+	github.com/spf13/afero v1.4.1 // indirect
 	github.com/spf13/cast v1.3.0
 	github.com/spf13/cobra v0.0.3
-	github.com/spf13/pflag v1.0.3 // indirect
+	github.com/spf13/viper v1.7.1 // indirect
-	github.com/stretchr/testify v1.4.0
+	github.com/stretchr/testify v1.7.0
 	github.com/volatiletech/null v8.0.0+incompatible
 	go.uber.org/atomic v1.5.1
-	golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9
 	golang.org/x/lint v0.0.0-20191125180803-fdd1cda4f05f // indirect
-	golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e
+	golang.org/x/sync v0.0.0-20210220032951-036812b2e83c
 	golang.org/x/tools v0.0.0-20191227053925-7b8e75db28f4 // indirect
 	google.golang.org/appengine v1.6.2 // indirect
-	gotest.tools v2.2.0+incompatible
 )
 
 go 1.15

go.sum

@@ -2,16 +2,31 @@ cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMT
 cloud.google.com/go v0.31.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
 cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
 cloud.google.com/go v0.37.0/go.mod h1:TS1dMSSfndXH133OKGwekG838Om/cQT0BUHV3HcBgoo=
+cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU=
+cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU=
+cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY=
+cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc=
+cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0=
+cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o=
+cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE=
+cloud.google.com/go/firestore v1.1.0/go.mod h1:ulACoGHTpvq5r8rxGJ4ddJZBZqakUQqClKRT5SZwBmk=
+cloud.google.com/go/pubsub v1.0.1/go.mod h1:R0Gpsv3s54REJCy4fxDixWD93lHJMoZTyQ2kNxGRt3I=
+cloud.google.com/go/storage v1.0.0/go.mod h1:IhtSnM/ZTZV8YYJWCY8RULGVqBDmpoyjwiyrjsg+URw=
 dmitri.shuralyov.com/app/changes v0.0.0-20180602232624-0a106ad413e3/go.mod h1:Yl+fi1br7+Rr3LqpNJf1/uxUdtRUV+Tnj0o93V2B9MU=
+dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
 dmitri.shuralyov.com/html/belt v0.0.0-20180602232347-f7d459c86be0/go.mod h1:JLBrvjyP0v+ecvNYvCpyZgu5/xkfAUhi6wJj28eUfSU=
 dmitri.shuralyov.com/service/change v0.0.0-20181023043359-a85b471d5412/go.mod h1:a1inKt/atXimZ4Mv927x+r7UpyzRUf4emIoiiSC2TN4=
 dmitri.shuralyov.com/state v0.0.0-20180228185332-28bcc343414c/go.mod h1:0PRwlb0D6DFvNNtx+9ybjezNCa8XF0xaYcETyp6rHWU=
 git.apache.org/thrift.git v0.0.0-20180902110319-2566ecd5d999/go.mod h1:fPE2ZNJGynbRyZ4dJvy6G277gSllfV2HJqblrnkyeyg=
 github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
 github.com/DataDog/datadog-go v2.2.0+incompatible/go.mod h1:LButxg5PwREeZtORoXG3tL4fMGNddJ+vMq1mwgfaqoQ=
-github.com/StackExchange/wmi v0.0.0-20170410192909-ea383cf3ba6e/go.mod h1:3eOhrUMpNV+6aFIbp5/iudMxNCF27Vw2OZgy4xEx0Fg=
+github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
+github.com/StackExchange/wmi v0.0.0-20190523213315-cbe66965904d/go.mod h1:3eOhrUMpNV+6aFIbp5/iudMxNCF27Vw2OZgy4xEx0Fg=
 github.com/aead/siphash v1.0.1/go.mod h1:Nywa3cDsYNNK3gaciGTWPwHt0wlpNV15vwmswBAUSII=
+github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
+github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
 github.com/anmitsu/go-shlex v0.0.0-20161002113705-648efa622239/go.mod h1:2FmKhYUyUczH0OGQWaF5ceTx0UBShxjsH6f8oGKYe2c=
 github.com/armon/circbuf v0.0.0-20150827004946-bbbad097214e/go.mod h1:3U/XgcO3hCbHZ8TKRvWD2dDTCfh9M9ya+I9JpbB7O8o=
 github.com/armon/go-metrics v0.0.0-20180917152333-f0300d1749da/go.mod h1:Q73ZrmVTwzkszR9V5SSuryQ31EELlFMUz1kKyl939pY=
@@ -22,9 +37,15 @@ github.com/asaskevich/govalidator v0.0.0-20180720115003-f9ffefc3facf/go.mod h1:l
 github.com/asaskevich/govalidator v0.0.0-20190424111038-f61b66f89f4a/go.mod h1:lB+ZfQJz7igIIfQNfa7Ml4HSf2uFQQRzpGGRXenZAgY=
 github.com/aws/aws-sdk-go v1.16.11 h1:g/c7gJeVyHoXCxM2fddS85bPGVkBF8s2q8t3fyElegc=
 github.com/aws/aws-sdk-go v1.16.11/go.mod h1:KmX6BPdI08NWTb3/sm4ZGu5ShLoqVDhKgpiN924inxo=
-github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973 h1:xJ4a3vCFaGF/jqvzLMYoU8P317H5OQ+Via4RmuPwCS0=
 github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
+github.com/beorn7/perks v1.0.0 h1:HWo1m869IqiPhD389kmkxeTalrjNbbJTC8LXupb+sl0=
+github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8=
 github.com/bgentry/speakeasy v0.1.0/go.mod h1:+zsyZBPWlz7T6j88CTgSN5bM796AkVf0kBD4zp0CCIs=
+github.com/bketelsen/crypt v0.0.3-0.20200106085610-5cbc8cc4026c/go.mod h1:MKsuJmJgSg28kpZDP6UIiPt0e0Oz0kqKNGyRaWEPv84=
+github.com/bluele/gcache v0.0.2 h1:WcbfdXICg7G/DGBh1PFfcirkWOQV+v077yF1pSy3DGw=
+github.com/bluele/gcache v0.0.2/go.mod h1:m15KV+ECjptwSPxKhOhQoAFQVtUFjTVkc3H8o0t/fp0=
+github.com/bparli/lfuda-go v0.3.1 h1:nO9Szo627RC8/z+R+MMPBItNwHCOonchmpjQuQi8jVY=
+github.com/bparli/lfuda-go v0.3.1/go.mod h1:BR5a9lwlqRqnPhU3F5ojFK3VhTKg8iFVtJJKgZBQhAo=
 github.com/bradfitz/go-smtpd v0.0.0-20170404230938-deb6d6237625/go.mod h1:HYsPBTaaSFSlLx/70C2HPIMNZpVV8+vt/A+FMnYP11g=
 github.com/btcsuite/btclog v0.0.0-20170628155309-84c8d2346e9f h1:bAs4lUbRJpnnkd9VhRV3jjAVU7DJVjMaK+IsvSeZvFo=
 github.com/btcsuite/btclog v0.0.0-20170628155309-84c8d2346e9f/go.mod h1:TdznJufoqS23FtqVCzL0ZqgP5MqXbb4fg/WgDys70nA=
@@ -39,61 +60,86 @@ github.com/btcsuite/websocket v0.0.0-20150119174127-31079b680792 h1:R8vQdOQdZ9Y3
 github.com/btcsuite/websocket v0.0.0-20150119174127-31079b680792/go.mod h1:ghJtEyQwv5/p4Mg4C0fgbePVuGr935/5ddU9Z3TmDRY=
 github.com/btcsuite/winsvc v1.0.0/go.mod h1:jsenWakMcC0zFBFurPLEAyrnc/teJEM1O46fmI40EZs=
 github.com/buger/jsonparser v0.0.0-20181115193947-bf1c66bbce23/go.mod h1:bbYlZJ7hK1yFx9hf58LP0zeX7UjIGs20ufpu3evjr+s=
+github.com/c2h5oh/datasize v0.0.0-20200825124411-48ed595a09d2 h1:t8KYCwSKsOEZBFELI4Pn/phbp38iJ1RRAkDFNin1aak=
+github.com/c2h5oh/datasize v0.0.0-20200825124411-48ed595a09d2/go.mod h1:S/7n9copUssQ56c7aAgHqftWO4LTf4xY6CGWt8Bc+3M=
+github.com/cespare/xxhash v1.1.0/go.mod h1:XrSqR1VqqWfGrhpAt58auRo0WTKS1nRRg3ghfAqPWnc=
 github.com/cheekybits/genny v1.0.0 h1:uGGa4nei+j20rOSeDeP5Of12XVm7TGUd4dJA9RDitfE=
 github.com/cheekybits/genny v1.0.0/go.mod h1:+tQajlRqAUrPI7DOSpB0XAqZYtQakVtB7wXkRAgjxjQ=
 github.com/circonus-labs/circonus-gometrics v2.3.1+incompatible/go.mod h1:nmEj6Dob7S7YxXgwXpfOuvO54S+tGdZdw9fuRZt25Ag=
 github.com/circonus-labs/circonusllhist v0.1.3/go.mod h1:kMXHVDlOchFAehlya5ePtbp5jckzBHf4XRpQvBOLI+I=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
+github.com/coreos/bbolt v1.3.2/go.mod h1:iRUV2dpdMOn7Bo10OQBFzIJO9kkE559Wcmn+qkEiiKk=
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@@ -127,13 +178,20 @@ github.com/gorilla/rpc v1.2.0 h1:WvvdC2lNeT1SP32zrIce5l0ECBfbAlmrmSBsuc57wfk=
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@@ -142,6 +200,7 @@ github.com/hashicorp/go-msgpack v0.5.5/go.mod h1:ahLV/dePpqEmjfWmKiqvPkv/twdG7iP
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@@ -400,6 +503,7 @@ golang.org/x/crypto v0.0.0-20181029021203-45a5f77698d3/go.mod h1:6SG95UA2DQfeDnf
 golang.org/x/crypto v0.0.0-20181030102418-4d3f4d9ffa16/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
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@@ -409,14 +513,28 @@ golang.org/x/crypto v0.0.0-20200221231518-2aa609cf4a9d/go.mod h1:LzIPMQfyMNhhGPh
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@@ -425,15 +543,17 @@ golang.org/x/net v0.0.0-20181029044818-c44066c5c816/go.mod h1:mL1N/T3taQHkDXs73r
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+rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
-rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA=
+rsc.io/goversion v1.2.0/go.mod h1:Eih9y/uIBS3ulggl7KNJ09xGSLcuNaLgmvvqa07sgfo=
 sourcegraph.com/sourcegraph/go-diff v0.5.0/go.mod h1:kuch7UrkMzY0X+p9CRK03kfuPQ2zzQcaEFbx8wA8rck=
 sourcegraph.com/sqs/pbtypes v0.0.0-20180604144634-d3ebe8f20ae4/go.mod h1:ketZ/q3QxT9HOBeFhu6RdvsftgpsbFHBF5Cas6cDKZ0=

internal/metrics/metrics.go

@@ -60,6 +60,7 @@ func (s *Server) Shutdown() {
 const (
 	ns             = "reflector"
 	subsystemCache = "cache"
+	subsystemITTT  = "ittt"
 
 	labelDirection = "direction"
 	labelErrorType = "error_type"
@@ -117,6 +118,11 @@ var (
 		Name:      "http3_blob_download_total",
 		Help:      "Total number of blobs downloaded from reflector through QUIC protocol",
 	})
+	HttpDownloadCount = promauto.NewCounter(prometheus.CounterOpts{
+		Namespace: ns,
+		Name:      "http_blob_download_total",
+		Help:      "Total number of blobs downloaded from reflector through HTTP protocol",
+	})
 
 	CacheHitCount = promauto.NewCounterVec(prometheus.CounterOpts{
 		Namespace: ns,
@@ -124,6 +130,18 @@ var (
 		Name:      "hit_total",
 		Help:      "Total number of blobs retrieved from the cache storage",
 	}, []string{LabelCacheType, LabelComponent})
+	ThisHitCount = promauto.NewCounter(prometheus.CounterOpts{
+		Namespace: ns,
+		Subsystem: subsystemITTT,
+		Name:      "this_hit_total",
+		Help:      "Total number of blobs retrieved from the this storage",
+	})
+	ThatHitCount = promauto.NewCounter(prometheus.CounterOpts{
+		Namespace: ns,
+		Subsystem: subsystemITTT,
+		Name:      "that_hit_total",
+		Help:      "Total number of blobs retrieved from the that storage",
+	})
 	CacheMissCount = promauto.NewCounterVec(prometheus.CounterOpts{
 		Namespace: ns,
 		Subsystem: subsystemCache,
@@ -181,11 +199,21 @@ var (
 		Name:      "udp_in_bytes",
 		Help:      "Total number of bytes downloaded through UDP",
 	})
+	MtrInBytesHttp = promauto.NewCounter(prometheus.CounterOpts{
+		Namespace: ns,
+		Name:      "http_in_bytes",
+		Help:      "Total number of bytes downloaded through HTTP",
+	})
 	MtrOutBytesUdp = promauto.NewCounter(prometheus.CounterOpts{
 		Namespace: ns,
 		Name:      "udp_out_bytes",
 		Help:      "Total number of bytes streamed out through UDP",
 	})
+	MtrOutBytesHttp = promauto.NewCounter(prometheus.CounterOpts{
+		Namespace: ns,
+		Name:      "http_out_bytes",
+		Help:      "Total number of bytes streamed out through UDP",
+	})
 	MtrInBytesReflector = promauto.NewCounter(prometheus.CounterOpts{
 		Namespace: ns,
 		Name:      "reflector_in_bytes",
@@ -201,6 +229,16 @@ var (
 		Name:      "s3_in_bytes",
 		Help:      "Total number of incoming bytes (from S3-CF)",
 	})
+	Http3BlobReqQueue = promauto.NewGauge(prometheus.GaugeOpts{
+		Namespace: ns,
+		Name:      "http3_blob_request_queue_size",
+		Help:      "Blob requests of https queue size",
+	})
+	RoutinesQueue = promauto.NewGaugeVec(prometheus.GaugeOpts{
+		Namespace: ns,
+		Name:      "routines",
+		Help:      "routines running by type",
+	}, []string{"package", "kind"})
 )
 
 func CacheLabels(name, component string) prometheus.Labels {

peer/client.go

@@ -9,6 +9,7 @@ import (
 	"time"
 
 	"github.com/lbryio/reflector.go/internal/metrics"
+	"github.com/lbryio/reflector.go/shared"
 	"github.com/lbryio/reflector.go/store"
 
 	"github.com/lbryio/lbry.go/v2/extras/errors"
@@ -57,10 +58,11 @@ func (c *Client) GetStream(sdHash string, blobCache store.BlobStore) (stream.Str
 
 	var sd stream.SDBlob
 
-	b, err := c.GetBlob(sdHash)
+	b, trace, err := c.GetBlob(sdHash)
 	if err != nil {
 		return nil, err
 	}
+	log.Debug(trace.String())
 
 	err = sd.FromBlob(b)
 	if err != nil {
@@ -71,10 +73,11 @@ func (c *Client) GetStream(sdHash string, blobCache store.BlobStore) (stream.Str
 	s[0] = b
 
 	for i := 0; i < len(sd.BlobInfos)-1; i++ {
-		s[i+1], err = c.GetBlob(hex.EncodeToString(sd.BlobInfos[i].BlobHash))
+		s[i+1], trace, err = c.GetBlob(hex.EncodeToString(sd.BlobInfos[i].BlobHash))
 		if err != nil {
 			return nil, err
 		}
+		log.Debug(trace.String())
 	}
 
 	return s, nil
@@ -114,47 +117,52 @@ func (c *Client) HasBlob(hash string) (bool, error) {
 }
 
 // GetBlob gets a blob
-func (c *Client) GetBlob(hash string) (stream.Blob, error) {
+func (c *Client) GetBlob(hash string) (stream.Blob, shared.BlobTrace, error) {
+	start := time.Now()
 	if !c.connected {
-		return nil, errors.Err("not connected")
+		return nil, shared.NewBlobTrace(time.Since(start), "tcp"), errors.Err("not connected")
 	}
 
 	sendRequest, err := json.Marshal(blobRequest{
 		RequestedBlob: hash,
 	})
 	if err != nil {
-		return nil, err
+		return nil, shared.NewBlobTrace(time.Since(start), "tcp"), err
 	}
 
 	err = c.write(sendRequest)
 	if err != nil {
-		return nil, err
+		return nil, shared.NewBlobTrace(time.Since(start), "tcp"), err
 	}
 
 	var resp blobResponse
 	err = c.read(&resp)
 	if err != nil {
-		return nil, err
+		return nil, shared.NewBlobTrace(time.Since(start), "tcp"), err
 	}
 
+	trace := shared.NewBlobTrace(time.Since(start), "tcp")
+	if resp.RequestTrace != nil {
+		trace = *resp.RequestTrace
+	}
 	if resp.IncomingBlob.Error != "" {
-		return nil, errors.Prefix(hash[:8], resp.IncomingBlob.Error)
+		return nil, trace, errors.Prefix(hash[:8], resp.IncomingBlob.Error)
 	}
 	if resp.IncomingBlob.BlobHash != hash {
-		return nil, errors.Prefix(hash[:8], "blob hash in response does not match requested hash")
+		return nil, trace.Stack(time.Since(start), "tcp"), errors.Prefix(hash[:8], "blob hash in response does not match requested hash")
 	}
 	if resp.IncomingBlob.Length <= 0 {
-		return nil, errors.Prefix(hash[:8], "length reported as <= 0")
+		return nil, trace, errors.Prefix(hash[:8], "length reported as <= 0")
 	}
 
 	log.Debugf("receiving blob %s from %s", hash[:8], c.conn.RemoteAddr())
 
 	blob, err := c.readRawBlob(resp.IncomingBlob.Length)
 	if err != nil {
-		return nil, err
+		return nil, (*resp.RequestTrace).Stack(time.Since(start), "tcp"), err
 	}
 	metrics.MtrInBytesTcp.Add(float64(len(blob)))
-	return blob, nil
+	return blob, trace.Stack(time.Since(start), "tcp"), nil
 }
 
 func (c *Client) read(v interface{}) error {

peer/http3/client.go

@@ -9,12 +9,14 @@ import (
 	"sync"
 	"time"
 
-	"github.com/lbryio/lbry.go/v2/extras/errors"
-	"github.com/lbryio/lbry.go/v2/stream"
 	"github.com/lbryio/reflector.go/internal/metrics"
+	"github.com/lbryio/reflector.go/shared"
 	"github.com/lbryio/reflector.go/store"
 
+	"github.com/lbryio/lbry.go/v2/extras/errors"
+	"github.com/lbryio/lbry.go/v2/stream"
 	"github.com/lucas-clemente/quic-go/http3"
+	log "github.com/sirupsen/logrus"
 )
 
 // Client is an instance of a client connected to a server.
@@ -35,7 +37,7 @@ func (c *Client) Close() error {
 func (c *Client) GetStream(sdHash string, blobCache store.BlobStore) (stream.Stream, error) {
 	var sd stream.SDBlob
 
-	b, err := c.GetBlob(sdHash)
+	b, _, err := c.GetBlob(sdHash)
 	if err != nil {
 		return nil, err
 	}
@@ -49,10 +51,12 @@ func (c *Client) GetStream(sdHash string, blobCache store.BlobStore) (stream.Str
 	s[0] = b
 
 	for i := 0; i < len(sd.BlobInfos)-1; i++ {
-		s[i+1], err = c.GetBlob(hex.EncodeToString(sd.BlobInfos[i].BlobHash))
+		var trace shared.BlobTrace
+		s[i+1], trace, err = c.GetBlob(hex.EncodeToString(sd.BlobInfos[i].BlobHash))
 		if err != nil {
 			return nil, err
 		}
+		log.Debug(trace.String())
 	}
 
 	return s, nil
@@ -75,26 +79,35 @@ func (c *Client) HasBlob(hash string) (bool, error) {
 }
 
 // GetBlob gets a blob
-func (c *Client) GetBlob(hash string) (stream.Blob, error) {
+func (c *Client) GetBlob(hash string) (stream.Blob, shared.BlobTrace, error) {
-	resp, err := c.conn.Get(fmt.Sprintf("https://%s/get/%s", c.ServerAddr, hash))
+	start := time.Now()
+	resp, err := c.conn.Get(fmt.Sprintf("https://%s/get/%s?trace=true", c.ServerAddr, hash))
 	if err != nil {
-		return nil, errors.Err(err)
+		return nil, shared.NewBlobTrace(time.Since(start), "http3"), errors.Err(err)
 	}
 	defer resp.Body.Close()
 
 	if resp.StatusCode == http.StatusNotFound {
 		fmt.Printf("%s blob not found %d\n", hash, resp.StatusCode)
-		return nil, errors.Err(store.ErrBlobNotFound)
+		return nil, shared.NewBlobTrace(time.Since(start), "http3"), errors.Err(store.ErrBlobNotFound)
 	} else if resp.StatusCode != http.StatusOK {
-		return nil, errors.Err("non 200 status code returned: %d", resp.StatusCode)
+		return nil, shared.NewBlobTrace(time.Since(start), "http3"), errors.Err("non 200 status code returned: %d", resp.StatusCode)
 	}
 
 	tmp := getBuffer()
 	defer putBuffer(tmp)
-
+	serialized := resp.Header.Get("Via")
+	trace := shared.NewBlobTrace(time.Since(start), "http3")
+	if serialized != "" {
+		parsedTrace, err := shared.Deserialize(serialized)
+		if err != nil {
+			return nil, shared.NewBlobTrace(time.Since(start), "http3"), err
+		}
+		trace = *parsedTrace
+	}
 	written, err := io.Copy(tmp, resp.Body)
 	if err != nil {
-		return nil, errors.Err(err)
+		return nil, trace.Stack(time.Since(start), "http3"), errors.Err(err)
 	}
 
 	blob := make([]byte, written)
@@ -102,7 +115,7 @@ func (c *Client) GetBlob(hash string) (stream.Blob, error) {
 
 	metrics.MtrInBytesUdp.Add(float64(len(blob)))
 
-	return blob, nil
+	return blob, trace.Stack(time.Since(start), "http3"), nil
 }
 
 // buffer pool to reduce GC

peer/http3/server.go

@@ -10,6 +10,8 @@ import (
 	"fmt"
 	"math/big"
 	"net/http"
+	"strconv"
+	"sync"
 	"time"
 
 	"github.com/lbryio/reflector.go/internal/metrics"
@@ -31,7 +33,7 @@ type Server struct {
 }
 
 // NewServer returns an initialized Server pointer.
-func NewServer(store store.BlobStore) *Server {
+func NewServer(store store.BlobStore, requestQueueSize int) *Server {
 	return &Server{
 		store: store,
 		grp:   stop.New(),
@@ -63,33 +65,21 @@ type availabilityResponse struct {
 // Start starts the server listener to handle connections.
 func (s *Server) Start(address string) error {
 	log.Println("HTTP3 peer listening on " + address)
+	window500M := 500 * 1 << 20
+
 	quicConf := &quic.Config{
-		HandshakeTimeout: 4 * time.Second,
+		MaxStreamReceiveWindow:     uint64(window500M),
-		MaxIdleTimeout:   10 * time.Second,
+		MaxConnectionReceiveWindow: uint64(window500M),
+		EnableDatagrams:            true,
+		HandshakeIdleTimeout:       4 * time.Second,
+		MaxIdleTimeout:             20 * time.Second,
 	}
 	r := mux.NewRouter()
 	r.HandleFunc("/get/{hash}", func(w http.ResponseWriter, r *http.Request) {
-		vars := mux.Vars(r)
+		waiter := &sync.WaitGroup{}
-		requestedBlob := vars["hash"]
+		waiter.Add(1)
-		blob, err := s.store.Get(requestedBlob)
+		enqueue(&blobRequest{request: r, reply: w, finished: waiter})
-		if err != nil {
+		waiter.Wait()
-			if errors.Is(err, store.ErrBlobNotFound) {
-				http.Error(w, err.Error(), http.StatusNotFound)
-				return
-			}
-			fmt.Printf("%s: %s", requestedBlob, errors.FullTrace(err))
-			s.logError(err)
-			http.Error(w, err.Error(), http.StatusBadRequest)
-			return
-		}
-
-		_, err = w.Write(blob)
-		if err != nil {
-			s.logError(err)
-		}
-		metrics.MtrOutBytesUdp.Add(float64(len(blob)))
-		metrics.BlobDownloadCount.Inc()
-		metrics.Http3DownloadCount.Inc()
 	})
 	r.HandleFunc("/has/{hash}", func(w http.ResponseWriter, r *http.Request) {
 		vars := mux.Vars(r)
@@ -127,7 +117,7 @@ func (s *Server) Start(address string) error {
 		},
 		QuicConfig: quicConf,
 	}
-
+	go InitWorkers(s, 200)
 	go s.listenForShutdown(&server)
 	s.grp.Add(1)
 	go func() {
@@ -176,3 +166,47 @@ func (s *Server) listenForShutdown(listener *http3.Server) {
 		log.Error("error closing listener for peer server - ", err)
 	}
 }
+
+func (s *Server) HandleGetBlob(w http.ResponseWriter, r *http.Request) {
+	vars := mux.Vars(r)
+	requestedBlob := vars["hash"]
+	traceParam := r.URL.Query().Get("trace")
+	var err error
+	wantsTrace := false
+	if traceParam != "" {
+		wantsTrace, err = strconv.ParseBool(traceParam)
+		if err != nil {
+			wantsTrace = false
+		}
+	}
+
+	blob, trace, err := s.store.Get(requestedBlob)
+
+	if wantsTrace {
+		serialized, err := trace.Serialize()
+		if err != nil {
+			http.Error(w, err.Error(), http.StatusNotFound)
+			return
+		}
+		w.Header().Add("Via", serialized)
+		log.Debug(trace.String())
+	}
+	if err != nil {
+		if errors.Is(err, store.ErrBlobNotFound) {
+			http.Error(w, err.Error(), http.StatusNotFound)
+			return
+		}
+		fmt.Printf("%s: %s", requestedBlob, errors.FullTrace(err))
+		s.logError(err)
+		http.Error(w, err.Error(), http.StatusBadRequest)
+		return
+	}
+
+	_, err = w.Write(blob)
+	if err != nil {
+		s.logError(err)
+	}
+	metrics.MtrOutBytesUdp.Add(float64(len(blob)))
+	metrics.BlobDownloadCount.Inc()
+	metrics.Http3DownloadCount.Inc()
+}

peer/http3/store.go

@@ -4,10 +4,14 @@ import (
 	"crypto/tls"
 	"crypto/x509"
 	"net/http"
+	"strings"
+	"sync"
 	"time"
 
 	"github.com/lbryio/lbry.go/v2/extras/errors"
 	"github.com/lbryio/lbry.go/v2/stream"
+	"github.com/lbryio/reflector.go/shared"
+	"github.com/lbryio/reflector.go/store"
 	"github.com/lucas-clemente/quic-go"
 	"github.com/lucas-clemente/quic-go/http3"
 )
@@ -16,6 +20,7 @@ import (
 // It satisfies the store.BlobStore interface but cannot put or delete blobs.
 type Store struct {
 	opts          StoreOpts
+	NotFoundCache *sync.Map
 }
 
 // StoreOpts allows to set options for a new Store.
@@ -26,13 +31,17 @@ type StoreOpts struct {
 
 // NewStore makes a new peer store.
 func NewStore(opts StoreOpts) *Store {
-	return &Store{opts: opts}
+	return &Store{opts: opts, NotFoundCache: &sync.Map{}}
 }
 
 func (p *Store) getClient() (*Client, error) {
 	var qconf quic.Config
-	qconf.HandshakeTimeout = 4 * time.Second
+	window500M := 500 * 1 << 20
-	qconf.MaxIdleTimeout = 10 * time.Second
+	qconf.MaxStreamReceiveWindow = uint64(window500M)
+	qconf.MaxConnectionReceiveWindow = uint64(window500M)
+	qconf.EnableDatagrams = true
+	qconf.HandshakeIdleTimeout = 4 * time.Second
+	qconf.MaxIdleTimeout = 20 * time.Second
 	pool, err := x509.SystemCertPool()
 	if err != nil {
 		return nil, err
@@ -68,10 +77,19 @@ func (p *Store) Has(hash string) (bool, error) {
 }
 
 // Get downloads the blob from the peer
-func (p *Store) Get(hash string) (stream.Blob, error) {
+func (p *Store) Get(hash string) (stream.Blob, shared.BlobTrace, error) {
+	start := time.Now()
+	if lastChecked, ok := p.NotFoundCache.Load(hash); ok {
+		if lastChecked.(time.Time).After(time.Now().Add(-5 * time.Minute)) {
+			return nil, shared.NewBlobTrace(time.Since(start), p.Name()+"-notfoundcache"), store.ErrBlobNotFound
+		}
+	}
 	c, err := p.getClient()
+	if err != nil && strings.Contains(err.Error(), "blob not found") {
+		p.NotFoundCache.Store(hash, time.Now())
+	}
 	if err != nil {
-		return nil, err
+		return nil, shared.NewBlobTrace(time.Since(start), p.Name()), err
 	}
 	defer c.Close()
 	return c.GetBlob(hash)
@@ -79,15 +97,20 @@ func (p *Store) Get(hash string) (stream.Blob, error) {
 
 // Put is not supported
 func (p *Store) Put(hash string, blob stream.Blob) error {
-	panic("http3Store cannot put or delete blobs")
+	return errors.Err(shared.ErrNotImplemented)
 }
 
 // PutSD is not supported
 func (p *Store) PutSD(hash string, blob stream.Blob) error {
-	panic("http3Store cannot put or delete blobs")
+	return errors.Err(shared.ErrNotImplemented)
 }
 
 // Delete is not supported
 func (p *Store) Delete(hash string) error {
-	panic("http3Store cannot put or delete blobs")
+	return errors.Err(shared.ErrNotImplemented)
+}
+
+// Delete is not supported
+func (p *Store) Shutdown() {
+	return
 }

peer/http3/worker.go

@@ -0,0 +1,47 @@
+package http3
+
+import (
+	"net/http"
+	"sync"
+
+	"github.com/lbryio/reflector.go/internal/metrics"
+
+	"github.com/lbryio/lbry.go/v2/extras/stop"
+)
+
+type blobRequest struct {
+	request  *http.Request
+	reply    http.ResponseWriter
+	finished *sync.WaitGroup
+}
+
+var getReqCh = make(chan *blobRequest, 20000)
+
+func InitWorkers(server *Server, workers int) {
+	stopper := stop.New(server.grp)
+	for i := 0; i < workers; i++ {
+		metrics.RoutinesQueue.WithLabelValues("http3", "worker").Inc()
+		go func(worker int) {
+			defer metrics.RoutinesQueue.WithLabelValues("http3", "worker").Dec()
+			for {
+				select {
+				case <-stopper.Ch():
+				case r := <-getReqCh:
+					metrics.Http3BlobReqQueue.Dec()
+					process(server, r)
+				}
+			}
+		}(i)
+	}
+	return
+}
+
+func enqueue(b *blobRequest) {
+	metrics.Http3BlobReqQueue.Inc()
+	getReqCh <- b
+}
+
+func process(server *Server, r *blobRequest) {
+	server.HandleGetBlob(r.reply, r.request)
+	r.finished.Done()
+}

peer/server.go

@@ -12,6 +12,7 @@ import (
 
 	"github.com/lbryio/reflector.go/internal/metrics"
 	"github.com/lbryio/reflector.go/reflector"
+	"github.com/lbryio/reflector.go/shared"
 	"github.com/lbryio/reflector.go/store"
 
 	"github.com/lbryio/lbry.go/v2/extras/errors"
@@ -88,7 +89,9 @@ func (s *Server) listenAndServe(listener net.Listener) {
 			log.Error(errors.Prefix("accepting conn", err))
 		} else {
 			s.grp.Add(1)
+			metrics.RoutinesQueue.WithLabelValues("peer", "server-handleconn").Inc()
 			go func() {
+				defer metrics.RoutinesQueue.WithLabelValues("peer", "server-handleconn").Dec()
 				s.handleConnection(conn)
 				s.grp.Done()
 			}()
@@ -253,6 +256,7 @@ func (s *Server) handleCompositeRequest(data []byte) ([]byte, error) {
 	}
 
 	var blob []byte
+	var trace shared.BlobTrace
 	if request.RequestedBlob != "" {
 		if len(request.RequestedBlob) != stream.BlobHashHexLength {
 			return nil, errors.Err("Invalid blob hash length")
@@ -260,7 +264,8 @@ func (s *Server) handleCompositeRequest(data []byte) ([]byte, error) {
 
 		log.Debugln("Sending blob " + request.RequestedBlob[:8])
 
-		blob, err = s.store.Get(request.RequestedBlob)
+		blob, trace, err = s.store.Get(request.RequestedBlob)
+		log.Debug(trace.String())
 		if errors.Is(err, store.ErrBlobNotFound) {
 			response.IncomingBlob = incomingBlob{
 				Error: err.Error(),
@@ -382,6 +387,7 @@ type incomingBlob struct {
 }
 type blobResponse struct {
 	IncomingBlob incomingBlob `json:"incoming_blob"`
+	RequestTrace *shared.BlobTrace
 }
 
 type compositeRequest struct {

peer/store.go

@@ -1,10 +1,13 @@
 package peer
 
 import (
+	"strings"
 	"time"
 
 	"github.com/lbryio/lbry.go/v2/extras/errors"
 	"github.com/lbryio/lbry.go/v2/stream"
+	"github.com/lbryio/reflector.go/shared"
+	"github.com/lbryio/reflector.go/store"
 )
 
 // Store is a blob store that gets blobs from a peer.
@@ -43,26 +46,37 @@ func (p *Store) Has(hash string) (bool, error) {
 }
 
 // Get downloads the blob from the peer
-func (p *Store) Get(hash string) (stream.Blob, error) {
+func (p *Store) Get(hash string) (stream.Blob, shared.BlobTrace, error) {
+	start := time.Now()
 	c, err := p.getClient()
 	if err != nil {
-		return nil, err
+		return nil, shared.NewBlobTrace(time.Since(start), p.Name()), err
 	}
 	defer c.Close()
-	return c.GetBlob(hash)
+	blob, trace, err := c.GetBlob(hash)
+	if err != nil && strings.Contains(err.Error(), "blob not found") {
+		return nil, trace, store.ErrBlobNotFound
+	}
+
+	return blob, trace, err
 }
 
 // Put is not supported
 func (p *Store) Put(hash string, blob stream.Blob) error {
-	panic("PeerStore cannot put or delete blobs")
+	return errors.Err(shared.ErrNotImplemented)
 }
 
 // PutSD is not supported
 func (p *Store) PutSD(hash string, blob stream.Blob) error {
-	panic("PeerStore cannot put or delete blobs")
+	return errors.Err(shared.ErrNotImplemented)
 }
 
 // Delete is not supported
 func (p *Store) Delete(hash string) error {
-	panic("PeerStore cannot put or delete blobs")
+	return errors.Err(shared.ErrNotImplemented)
+}
+
+// Delete is not supported
+func (p *Store) Shutdown() {
+	return
 }

prism/prism.go

@@ -79,7 +79,7 @@ func New(conf *Config) *Prism {
 		dht:       d,
 		cluster:   c,
 		peer:      peer.NewServer(conf.Blobs),
-		reflector: reflector.NewServer(conf.Blobs),
+		reflector: reflector.NewServer(conf.Blobs, conf.Blobs),
 
 		grp: stop.New(),
 	}

publish/publish.go

@@ -3,7 +3,6 @@ package publish
 import (
 	"bytes"
 	"encoding/json"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"sort"
@@ -21,7 +20,6 @@ import (
 	"github.com/btcsuite/btcd/wire"
 	"github.com/btcsuite/btcutil"
 	"github.com/golang/protobuf/proto"
-	"golang.org/x/crypto/sha3"
 )
 
 var TODO = `
@@ -43,6 +41,14 @@ var TODO = `
 }
 `
 
+type Details struct {
+	Title       string
+	Description string
+	Author      string
+	Tags        []string
+	ReleaseTime int64
+}
+
 func Publish(client *lbrycrd.Client, path, name, address string, details Details, reflectorAddress string) (*wire.MsgTx, *chainhash.Hash, error) {
 	if name == "" {
 		return nil, nil, errors.Err("name required")
@@ -69,11 +75,20 @@ func Publish(client *lbrycrd.Client, path, name, address string, details Details
 		return nil, nil, err
 	}
 
-	claim, st, err := makeClaimAndStream(path, details)
+	st, stPB, err := makeStream(path)
 	if err != nil {
 		return nil, nil, err
 	}
 
+	stPB.Author = details.Author
+	stPB.ReleaseTime = details.ReleaseTime
+
+	claim := &pb.Claim{
+		Title:       details.Title,
+		Description: details.Description,
+		Type:        &pb.Claim_Stream{Stream: stPB},
+	}
+
 	err = addClaimToTx(tx, claim, name, amount, addr)
 	if err != nil {
 		return nil, nil, err
@@ -203,50 +218,31 @@ func reflect(st stream.Stream, reflectorAddress string) error {
 	return nil
 }
 
-type Details struct {
+func makeStream(path string) (stream.Stream, *pb.Stream, error) {
-	Title       string
-	Description string
-	Author      string
-	Tags        []string
-	ReleaseTime int64
-}
-
-func makeClaimAndStream(path string, details Details) (*pb.Claim, stream.Stream, error) {
 	file, err := os.Open(path)
 	if err != nil {
 		return nil, nil, errors.Err(err)
 	}
-	data, err := ioutil.ReadAll(file)
+	defer file.Close()
-	if err != nil {
+
-		return nil, nil, errors.Err(err)
+	enc := stream.NewEncoder(file)
-	}
+
-	s, err := stream.New(data)
+	s, err := enc.Stream()
 	if err != nil {
 		return nil, nil, errors.Err(err)
 	}
 
-	// make the claim
+	streamProto := &pb.Stream{
-	sdBlob := &stream.SDBlob{}
-	err = sdBlob.FromBlob(s[0])
-	if err != nil {
-		return nil, nil, errors.Err(err)
-	}
-
-	filehash := sha3.Sum384(data)
-
-	streamPB := &pb.Stream{
-		Author:      details.Author,
-		ReleaseTime: details.ReleaseTime,
 		Source: &pb.Source{
-			SdHash: s[0].Hash(),
+			SdHash: enc.SDBlob().Hash(),
 			Name:   filepath.Base(file.Name()),
-			Size:   uint64(len(data)),
+			Size:   uint64(enc.SourceLen()),
-			Hash:   filehash[:],
+			Hash:   enc.SourceHash(),
 		},
 	}
 
 	mimeType, category := guessMimeType(filepath.Ext(file.Name()))
-	streamPB.Source.MediaType = mimeType
+	streamProto.Source.MediaType = mimeType
 
 	switch category {
 	case "video":
@@ -254,20 +250,14 @@ func makeClaimAndStream(path string, details Details) (*pb.Claim, stream.Stream,
 		//if err != nil {
 		//	return nil, nil, err
 		//}
-		streamPB.Type = &pb.Stream_Video{}
+		streamProto.Type = &pb.Stream_Video{}
 	case "audio":
-		streamPB.Type = &pb.Stream_Audio{}
+		streamProto.Type = &pb.Stream_Audio{}
 	case "image":
-		streamPB.Type = &pb.Stream_Image{}
+		streamProto.Type = &pb.Stream_Image{}
 	}
 
-	claim := &pb.Claim{
+	return s, streamProto, nil
-		Title:       details.Title,
-		Description: details.Description,
-		Type:        &pb.Claim_Stream{Stream: streamPB},
-	}
-
-	return claim, s, nil
 }
 
 func getClaimPayoutScript(name string, value []byte, address btcutil.Address) ([]byte, error) {

reflector/blocklist.go

@@ -8,6 +8,8 @@ import (
 	"strings"
 	"time"
 
+	"github.com/lbryio/reflector.go/internal/metrics"
+
 	"github.com/lbryio/reflector.go/store"
 	"github.com/lbryio/reflector.go/wallet"
 
@@ -109,8 +111,9 @@ func sdHashesForOutpoints(walletServers, outpoints []string, stopper stop.Chan)
 	}
 
 	done := make(chan bool)
-
+	metrics.RoutinesQueue.WithLabelValues("reflector", "sdhashesforoutput").Inc()
 	go func() {
+		defer metrics.RoutinesQueue.WithLabelValues("reflector", "sdhashesforoutput").Dec()
 		select {
 		case <-done:
 		case <-stopper:

reflector/server.go

@@ -10,6 +10,7 @@ import (
 	"net"
 	"time"
 
+	"github.com/google/gops/agent"
 	"github.com/lbryio/reflector.go/internal/metrics"
 	"github.com/lbryio/reflector.go/store"
 
@@ -40,15 +41,17 @@ type Server struct {
 
 	EnableBlocklist bool // if true, blocklist checking and blob deletion will be enabled
 
-	store store.BlobStore
+	underlyingStore store.BlobStore
+	outerStore      store.BlobStore
 	grp             *stop.Group
 }
 
 // NewServer returns an initialized reflector server pointer.
-func NewServer(store store.BlobStore) *Server {
+func NewServer(underlying store.BlobStore, outer store.BlobStore) *Server {
 	return &Server{
 		Timeout:         DefaultTimeout,
-		store:   store,
+		underlyingStore: underlying,
+		outerStore:      outer,
 		grp:             stop.New(),
 	}
 }
@@ -67,9 +70,13 @@ func (s *Server) Start(address string) error {
 		return errors.Err(err)
 	}
 	log.Println("reflector listening on " + address)
-
+	if err := agent.Listen(agent.Options{}); err != nil {
+		log.Fatal(err)
+	}
 	s.grp.Add(1)
+	metrics.RoutinesQueue.WithLabelValues("reflector", "listener").Inc()
 	go func() {
+		defer metrics.RoutinesQueue.WithLabelValues("reflector", "listener").Dec()
 		<-s.grp.Ch()
 		err := l.Close()
 		if err != nil {
@@ -79,15 +86,19 @@ func (s *Server) Start(address string) error {
 	}()
 
 	s.grp.Add(1)
+	metrics.RoutinesQueue.WithLabelValues("reflector", "start").Inc()
 	go func() {
+		defer metrics.RoutinesQueue.WithLabelValues("reflector", "start").Dec()
 		s.listenAndServe(l)
 		s.grp.Done()
 	}()
 
 	if s.EnableBlocklist {
-		if b, ok := s.store.(store.Blocklister); ok {
+		if b, ok := s.underlyingStore.(store.Blocklister); ok {
 			s.grp.Add(1)
+			metrics.RoutinesQueue.WithLabelValues("reflector", "enableblocklist").Inc()
 			go func() {
+				defer metrics.RoutinesQueue.WithLabelValues("reflector", "enableblocklist").Dec()
 				s.enableBlocklist(b)
 				s.grp.Done()
 			}()
@@ -110,7 +121,9 @@ func (s *Server) listenAndServe(listener net.Listener) {
 			log.Error(err)
 		} else {
 			s.grp.Add(1)
+			metrics.RoutinesQueue.WithLabelValues("reflector", "server-listenandserve").Inc()
 			go func() {
+				defer metrics.RoutinesQueue.WithLabelValues("reflector", "server-listenandserve").Inc()
 				s.handleConn(conn)
 				s.grp.Done()
 			}()
@@ -125,7 +138,9 @@ func (s *Server) handleConn(conn net.Conn) {
 		close(connNeedsClosing)
 	}()
 	s.grp.Add(1)
+	metrics.RoutinesQueue.WithLabelValues("reflector", "server-handleconn").Inc()
 	go func() {
+		defer metrics.RoutinesQueue.WithLabelValues("reflector", "server-handleconn").Dec()
 		defer s.grp.Done()
 		select {
 		case <-connNeedsClosing:
@@ -190,13 +205,13 @@ func (s *Server) receiveBlob(conn net.Conn) error {
 	}
 
 	var wantsBlob bool
-	if bl, ok := s.store.(store.Blocklister); ok {
+	if bl, ok := s.underlyingStore.(store.Blocklister); ok {
 		wantsBlob, err = bl.Wants(blobHash)
 		if err != nil {
 			return err
 		}
 	} else {
-		blobExists, err := s.store.Has(blobHash)
+		blobExists, err := s.underlyingStore.Has(blobHash)
 		if err != nil {
 			return err
 		}
@@ -206,7 +221,7 @@ func (s *Server) receiveBlob(conn net.Conn) error {
 	var neededBlobs []string
 
 	if isSdBlob && !wantsBlob {
-		if nbc, ok := s.store.(neededBlobChecker); ok {
+		if nbc, ok := s.underlyingStore.(neededBlobChecker); ok {
 			neededBlobs, err = nbc.MissingBlobsForKnownStream(blobHash)
 			if err != nil {
 				return err
@@ -249,9 +264,9 @@ func (s *Server) receiveBlob(conn net.Conn) error {
 	log.Debugln("Got blob " + blobHash[:8])
 
 	if isSdBlob {
-		err = s.store.PutSD(blobHash, blob)
+		err = s.outerStore.PutSD(blobHash, blob)
 	} else {
-		err = s.store.Put(blobHash, blob)
+		err = s.outerStore.Put(blobHash, blob)
 	}
 	if err != nil {
 		return err

reflector/server_test.go

@@ -22,7 +22,7 @@ func startServerOnRandomPort(t *testing.T) (*Server, int) {
 		t.Fatal(err)
 	}
 
-	srv := NewServer(store.NewMemStore())
+	srv := NewServer(store.NewMemStore(), store.NewMemStore())
 	err = srv.Start("127.0.0.1:" + strconv.Itoa(port))
 	if err != nil {
 		t.Fatal(err)
@@ -119,7 +119,7 @@ func TestServer_Timeout(t *testing.T) {
 		t.Fatal(err)
 	}
 
-	srv := NewServer(store.NewMemStore())
+	srv := NewServer(store.NewMemStore(), store.NewMemStore())
 	srv.Timeout = testTimeout
 	err = srv.Start("127.0.0.1:" + strconv.Itoa(port))
 	if err != nil {
@@ -190,7 +190,7 @@ func TestServer_PartialUpload(t *testing.T) {
 		t.Fatal(err)
 	}
 
-	srv := NewServer(st)
+	srv := NewServer(st, st)
 	err = srv.Start("127.0.0.1:" + strconv.Itoa(port))
 	if err != nil {
 		t.Fatal(err)

reflector/uploader.go

@@ -7,6 +7,8 @@ import (
 	"sync"
 	"time"
 
+	"github.com/lbryio/reflector.go/internal/metrics"
+
 	"github.com/lbryio/reflector.go/db"
 	"github.com/lbryio/reflector.go/store"
 
@@ -74,7 +76,7 @@ func (u *Uploader) Upload(dirOrFilePath string) error {
 
 	var exists map[string]bool
 	if !u.skipExistsCheck {
-		exists, err = u.db.HasBlobs(hashes)
+		exists, err = u.db.HasBlobs(hashes, false)
 		if err != nil {
 			return err
 		}
@@ -88,7 +90,9 @@ func (u *Uploader) Upload(dirOrFilePath string) error {
 
 	for i := 0; i < u.workers; i++ {
 		workerWG.Add(1)
+		metrics.RoutinesQueue.WithLabelValues("reflector", "upload").Inc()
 		go func(i int) {
+			defer metrics.RoutinesQueue.WithLabelValues("reflector", "upload").Dec()
 			defer workerWG.Done()
 			defer func(i int) { log.Debugf("worker %d quitting", i) }(i)
 			u.worker(pathChan)
@@ -97,7 +101,9 @@ func (u *Uploader) Upload(dirOrFilePath string) error {
 
 	countWG := sync.WaitGroup{}
 	countWG.Add(1)
+	metrics.RoutinesQueue.WithLabelValues("reflector", "uploader").Inc()
 	go func() {
+		defer metrics.RoutinesQueue.WithLabelValues("reflector", "uploader").Dec()
 		defer countWG.Done()
 		u.counter()
 	}()

server/http/routes.go

@@ -0,0 +1,59 @@
+package http
+
+import (
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+	"github.com/lbryio/lbry.go/v2/extras/errors"
+
+	"github.com/lbryio/reflector.go/internal/metrics"
+	"github.com/lbryio/reflector.go/store"
+
+	log "github.com/sirupsen/logrus"
+)
+
+func (s *Server) getBlob(c *gin.Context) {
+	hash := c.Query("hash")
+	blob, trace, err := s.store.Get(hash)
+	if err != nil {
+		serialized, serializeErr := trace.Serialize()
+		if serializeErr != nil {
+			_ = c.AbortWithError(http.StatusInternalServerError, errors.Prefix(serializeErr.Error(), err))
+			return
+		}
+		c.Header("Via", serialized)
+
+		if errors.Is(err, store.ErrBlobNotFound) {
+			log.Errorf("wtf: %s", err.Error())
+			c.AbortWithStatus(http.StatusNotFound)
+			return
+		}
+		_ = c.AbortWithError(http.StatusInternalServerError, err)
+		return
+	}
+	serialized, err := trace.Serialize()
+	if err != nil {
+		_ = c.AbortWithError(http.StatusInternalServerError, err)
+		return
+	}
+	metrics.MtrOutBytesHttp.Add(float64(len(blob)))
+	metrics.BlobDownloadCount.Inc()
+	metrics.HttpDownloadCount.Inc()
+	c.Header("Via", serialized)
+	c.Header("Content-Disposition", "filename="+hash)
+	c.Data(http.StatusOK, "application/octet-stream", blob)
+}
+
+func (s *Server) hasBlob(c *gin.Context) {
+	hash := c.Query("hash")
+	has, err := s.store.Has(hash)
+	if err != nil {
+		_ = c.AbortWithError(http.StatusInternalServerError, err)
+		return
+	}
+	if has {
+		c.Status(http.StatusNoContent)
+		return
+	}
+	c.Status(http.StatusNotFound)
+}

server/http/server.go

@@ -0,0 +1,68 @@
+package http
+
+import (
+	"context"
+	"net/http"
+	"time"
+
+	"github.com/gin-gonic/gin"
+	"github.com/lbryio/lbry.go/v2/extras/stop"
+	"github.com/lbryio/reflector.go/store"
+	log "github.com/sirupsen/logrus"
+)
+
+// Server is an instance of a peer server that houses the listener and store.
+type Server struct {
+	store store.BlobStore
+	grp   *stop.Group
+}
+
+// NewServer returns an initialized Server pointer.
+func NewServer(store store.BlobStore) *Server {
+	return &Server{
+		store: store,
+		grp:   stop.New(),
+	}
+}
+
+// Shutdown gracefully shuts down the peer server.
+func (s *Server) Shutdown() {
+	log.Debug("shutting down HTTP server")
+	s.grp.StopAndWait()
+	log.Debug("HTTP server stopped")
+}
+
+// Start starts the server listener to handle connections.
+func (s *Server) Start(address string) error {
+	gin.SetMode(gin.ReleaseMode)
+	router := gin.Default()
+	router.GET("/blob", s.getBlob)
+	router.HEAD("/blob", s.hasBlob)
+	srv := &http.Server{
+		Addr:    address,
+		Handler: router,
+	}
+	go s.listenForShutdown(srv)
+	// Initializing the server in a goroutine so that
+	// it won't block the graceful shutdown handling below
+	s.grp.Add(1)
+	go func() {
+		defer s.grp.Done()
+		log.Println("HTTP server listening on " + address)
+		if err := srv.ListenAndServe(); err != nil && err != http.ErrServerClosed {
+			log.Fatalf("listen: %s\n", err)
+		}
+	}()
+	return nil
+}
+
+func (s *Server) listenForShutdown(listener *http.Server) {
+	<-s.grp.Ch()
+	// The context is used to inform the server it has 5 seconds to finish
+	// the request it is currently handling
+	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+	defer cancel()
+	if err := listener.Shutdown(ctx); err != nil {
+		log.Fatal("Server forced to shutdown:", err)
+	}
+}

shared/errors.go

@@ -0,0 +1,6 @@
+package shared
+
+import "github.com/lbryio/lbry.go/v2/extras/errors"
+
+//ErrNotImplemented is a standard error when a store that implements the store interface does not implement a method
+var ErrNotImplemented = errors.Base("this store does not implement this method")

shared/shared.go

@@ -0,0 +1,82 @@
+package shared
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+	"time"
+
+	"github.com/lbryio/lbry.go/v2/extras/errors"
+)
+
+type BlobStack struct {
+	Timing     time.Duration `json:"timing"`
+	OriginName string        `json:"origin_name"`
+	HostName   string        `json:"host_name"`
+}
+type BlobTrace struct {
+	Stacks []BlobStack `json:"stacks"`
+}
+
+var hostName *string
+
+func getHostName() string {
+	if hostName == nil {
+		hn, err := os.Hostname()
+		if err != nil {
+			hn = "unknown"
+		}
+		hostName = &hn
+	}
+	return *hostName
+}
+func (b *BlobTrace) Stack(timing time.Duration, originName string) BlobTrace {
+	b.Stacks = append(b.Stacks, BlobStack{
+		Timing:     timing,
+		OriginName: originName,
+		HostName:   getHostName(),
+	})
+	return *b
+}
+func (b *BlobTrace) Merge(otherTrance BlobTrace) BlobTrace {
+	b.Stacks = append(b.Stacks, otherTrance.Stacks...)
+	return *b
+}
+func NewBlobTrace(timing time.Duration, originName string) BlobTrace {
+	b := BlobTrace{}
+	b.Stacks = append(b.Stacks, BlobStack{
+		Timing:     timing,
+		OriginName: originName,
+		HostName:   getHostName(),
+	})
+	return b
+}
+
+func (b BlobTrace) String() string {
+	var fullTrace string
+	for i, stack := range b.Stacks {
+		delta := time.Duration(0)
+		if i > 0 {
+			delta = stack.Timing - b.Stacks[i-1].Timing
+		}
+		fullTrace += fmt.Sprintf("[%d](%s) origin: %s - timing: %s - delta: %s\n", i, stack.HostName, stack.OriginName, stack.Timing.String(), delta.String())
+	}
+	return fullTrace
+}
+
+func (b BlobTrace) Serialize() (string, error) {
+	t, err := json.Marshal(b)
+	if err != nil {
+		return "", errors.Err(err)
+	}
+	return string(t), nil
+}
+
+func Deserialize(serializedData string) (*BlobTrace, error) {
+	var trace BlobTrace
+	err := json.Unmarshal([]byte(serializedData), &trace)
+	if err != nil {
+		return nil, errors.Err(err)
+	}
+	return &trace, nil
+}

shared/shared_test.go

@@ -0,0 +1,44 @@
+package shared
+
+import (
+	"os"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestBlobTrace_Serialize(t *testing.T) {
+	hostName, err := os.Hostname()
+	require.NoError(t, err)
+
+	stack := NewBlobTrace(10*time.Second, "test")
+	stack.Stack(20*time.Second, "test2")
+	stack.Stack(30*time.Second, "test3")
+	serialized, err := stack.Serialize()
+	require.NoError(t, err)
+
+	expected := `{"stacks":[{"timing":10000000000,"origin_name":"test","host_name":"` +
+		hostName +
+		`"},{"timing":20000000000,"origin_name":"test2","host_name":"` +
+		hostName +
+		`"},{"timing":30000000000,"origin_name":"test3","host_name":"` +
+		hostName +
+		`"}]}`
+	assert.Equal(t, expected, serialized)
+}
+
+func TestBlobTrace_Deserialize(t *testing.T) {
+	serialized := `{"stacks":[{"timing":10000000000,"origin_name":"test"},{"timing":20000000000,"origin_name":"test2"},{"timing":30000000000,"origin_name":"test3"}]}`
+	stack, err := Deserialize(serialized)
+	require.NoError(t, err)
+
+	assert.Len(t, stack.Stacks, 3)
+	assert.Equal(t, stack.Stacks[0].Timing, 10*time.Second)
+	assert.Equal(t, stack.Stacks[1].Timing, 20*time.Second)
+	assert.Equal(t, stack.Stacks[2].Timing, 30*time.Second)
+	assert.Equal(t, stack.Stacks[0].OriginName, "test")
+	assert.Equal(t, stack.Stacks[1].OriginName, "test2")
+	assert.Equal(t, stack.Stacks[2].OriginName, "test3")
+}

store/caching.go

@@ -5,6 +5,8 @@ import (
 
 	"github.com/lbryio/lbry.go/v2/extras/errors"
 	"github.com/lbryio/lbry.go/v2/stream"
+	"github.com/lbryio/reflector.go/shared"
+	log "github.com/sirupsen/logrus"
 
 	"github.com/lbryio/reflector.go/internal/metrics"
 )
@@ -22,7 +24,7 @@ func NewCachingStore(component string, origin, cache BlobStore) *CachingStore {
 	return &CachingStore{
 		component: component,
 		origin:    WithSingleFlight(component, origin),
-		cache:     cache,
+		cache:     WithSingleFlight(component, cache),
 	}
 }
 
@@ -42,9 +44,9 @@ func (c *CachingStore) Has(hash string) (bool, error) {
 
 // Get tries to get the blob from the cache first, falling back to the origin. If the blob comes
 // from the origin, it is also stored in the cache.
-func (c *CachingStore) Get(hash string) (stream.Blob, error) {
+func (c *CachingStore) Get(hash string) (stream.Blob, shared.BlobTrace, error) {
 	start := time.Now()
-	blob, err := c.cache.Get(hash)
+	blob, trace, err := c.cache.Get(hash)
 	if err == nil || !errors.Is(err, ErrBlobNotFound) {
 		metrics.CacheHitCount.With(metrics.CacheLabels(c.cache.Name(), c.component)).Inc()
 		rate := float64(len(blob)) / 1024 / 1024 / time.Since(start).Seconds()
@@ -53,18 +55,26 @@ func (c *CachingStore) Get(hash string) (stream.Blob, error) {
 			metrics.LabelComponent: c.component,
 			metrics.LabelSource:    "cache",
 		}).Set(rate)
-		return blob, err
+		return blob, trace.Stack(time.Since(start), c.Name()), err
 	}
 
 	metrics.CacheMissCount.With(metrics.CacheLabels(c.cache.Name(), c.component)).Inc()
 
-	blob, err = c.origin.Get(hash)
+	blob, trace, err = c.origin.Get(hash)
 	if err != nil {
-		return nil, err
+		return nil, trace.Stack(time.Since(start), c.Name()), err
 	}
-
+	// there is no need to wait for the blob to be stored before we return it
+	// TODO: however this should be refactored to limit the amount of routines that the process can spawn to avoid a possible DoS
+	metrics.RoutinesQueue.WithLabelValues("store", "cache-put").Inc()
+	go func() {
+		defer metrics.RoutinesQueue.WithLabelValues("store", "cache-put").Dec()
 		err = c.cache.Put(hash, blob)
-	return blob, err
+		if err != nil {
+			log.Errorf("error saving blob to underlying cache: %s", errors.FullTrace(err))
+		}
+	}()
+	return blob, trace.Stack(time.Since(start), c.Name()), nil
 }
 
 // Put stores the blob in the origin and the cache
@@ -93,3 +103,10 @@ func (c *CachingStore) Delete(hash string) error {
 	}
 	return c.cache.Delete(hash)
 }
+
+// Shutdown shuts down the store gracefully
+func (c *CachingStore) Shutdown() {
+	c.origin.Shutdown()
+	c.cache.Shutdown()
+	return
+}

store/caching_test.go

@@ -7,6 +7,7 @@ import (
 	"time"
 
 	"github.com/lbryio/lbry.go/v2/stream"
+	"github.com/lbryio/reflector.go/shared"
 )
 
 func TestCachingStore_Put(t *testing.T) {
@@ -51,13 +52,14 @@ func TestCachingStore_CacheMiss(t *testing.T) {
 		t.Fatal(err)
 	}
 
-	res, err := s.Get(hash)
+	res, stack, err := s.Get(hash)
 	if err != nil {
 		t.Fatal(err)
 	}
 	if !bytes.Equal(b, res) {
 		t.Errorf("expected Get() to return %s, got %s", string(b), string(res))
 	}
+	time.Sleep(10 * time.Millisecond) //storing to cache is done async so let's give it some time
 
 	has, err := cache.Has(hash)
 	if err != nil {
@@ -66,14 +68,16 @@ func TestCachingStore_CacheMiss(t *testing.T) {
 	if !has {
 		t.Errorf("Get() did not copy blob to cache")
 	}
+	t.Logf("stack: %s", stack.String())
 
-	res, err = cache.Get(hash)
+	res, stack, err = cache.Get(hash)
 	if err != nil {
 		t.Fatal(err)
 	}
 	if !bytes.Equal(b, res) {
 		t.Errorf("expected cached Get() to return %s, got %s", string(b), string(res))
 	}
+	t.Logf("stack: %s", stack.String())
 }
 
 func TestCachingStore_ThunderingHerd(t *testing.T) {
@@ -92,7 +96,7 @@ func TestCachingStore_ThunderingHerd(t *testing.T) {
 	wg := &sync.WaitGroup{}
 
 	getNoErr := func() {
-		res, err := s.Get(hash)
+		res, _, err := s.Get(hash)
 		if err != nil {
 			t.Fatal(err)
 		}
@@ -148,7 +152,7 @@ func (s *SlowBlobStore) Has(hash string) (bool, error) {
 	return s.mem.Has(hash)
 }
 
-func (s *SlowBlobStore) Get(hash string) (stream.Blob, error) {
+func (s *SlowBlobStore) Get(hash string) (stream.Blob, shared.BlobTrace, error) {
 	time.Sleep(s.delay)
 	return s.mem.Get(hash)
 }
@@ -167,3 +171,7 @@ func (s *SlowBlobStore) Delete(hash string) error {
 	time.Sleep(s.delay)
 	return s.mem.Delete(hash)
 }
+
+func (s *SlowBlobStore) Shutdown() {
+	return
+}

store/cloudfront_ro.go

@@ -6,11 +6,11 @@ import (
 	"net/http"
 	"time"
 
-	"github.com/lbryio/reflector.go/internal/metrics"
-	"github.com/lbryio/reflector.go/meta"
-
 	"github.com/lbryio/lbry.go/v2/extras/errors"
 	"github.com/lbryio/lbry.go/v2/stream"
+	"github.com/lbryio/reflector.go/internal/metrics"
+	"github.com/lbryio/reflector.go/meta"
+	"github.com/lbryio/reflector.go/shared"
 
 	log "github.com/sirupsen/logrus"
 )
@@ -49,30 +49,30 @@ func (c *CloudFrontROStore) Has(hash string) (bool, error) {
 }
 
 // Get gets the blob from Cloudfront.
-func (c *CloudFrontROStore) Get(hash string) (stream.Blob, error) {
+func (c *CloudFrontROStore) Get(hash string) (stream.Blob, shared.BlobTrace, error) {
 	log.Debugf("Getting %s from S3", hash[:8])
+	start := time.Now()
 	defer func(t time.Time) {
 		log.Debugf("Getting %s from S3 took %s", hash[:8], time.Since(t).String())
-	}(time.Now())
+	}(start)
 
 	status, body, err := c.cfRequest(http.MethodGet, hash)
 	if err != nil {
-		return nil, err
+		return nil, shared.NewBlobTrace(time.Since(start), c.Name()), err
 	}
 	defer body.Close()
-
 	switch status {
 	case http.StatusNotFound, http.StatusForbidden:
-		return nil, errors.Err(ErrBlobNotFound)
+		return nil, shared.NewBlobTrace(time.Since(start), c.Name()), errors.Err(ErrBlobNotFound)
 	case http.StatusOK:
 		b, err := ioutil.ReadAll(body)
 		if err != nil {
-			return nil, errors.Err(err)
+			return nil, shared.NewBlobTrace(time.Since(start), c.Name()), errors.Err(err)
 		}
 		metrics.MtrInBytesS3.Add(float64(len(b)))
-		return b, nil
+		return b, shared.NewBlobTrace(time.Since(start), c.Name()), nil
 	default:
-		return nil, errors.Err("unexpected status %d", status)
+		return nil, shared.NewBlobTrace(time.Since(start), c.Name()), errors.Err("unexpected status %d", status)
 	}
 }
 
@@ -93,13 +93,18 @@ func (c *CloudFrontROStore) cfRequest(method, hash string) (int, io.ReadCloser,
 }
 
 func (c *CloudFrontROStore) Put(_ string, _ stream.Blob) error {
-	panic("CloudFrontROStore cannot do writes. Use CloudFrontRWStore")
+	return errors.Err(shared.ErrNotImplemented)
 }
 
 func (c *CloudFrontROStore) PutSD(_ string, _ stream.Blob) error {
-	panic("CloudFrontROStore cannot do writes. Use CloudFrontRWStore")
+	return errors.Err(shared.ErrNotImplemented)
 }
 
 func (c *CloudFrontROStore) Delete(_ string) error {
-	panic("CloudFrontROStore cannot do writes. Use CloudFrontRWStore")
+	return errors.Err(shared.ErrNotImplemented)
+}
+
+// Shutdown shuts down the store gracefully
+func (c *CloudFrontROStore) Shutdown() {
+	return
 }

store/cloudfront_rw.go

@@ -1,18 +1,21 @@
 package store
 
 import (
+	"time"
+
 	"github.com/lbryio/lbry.go/v2/stream"
+	"github.com/lbryio/reflector.go/shared"
 )
 
-// CloudFrontRWStore combines a Cloudfront and an S3 store. Reads go to Cloudfront, writes go to S3.
+// CloudFrontRWStore combines a Cloudfront and an S3 store. Reads go to Cloudfront/Wasabi, writes go to S3.
 type CloudFrontRWStore struct {
-	cf *CloudFrontROStore
+	cf *ITTTStore
 	s3 *S3Store
 }
 
 // NewCloudFrontRWStore returns an initialized CloudFrontRWStore store pointer.
 // NOTE: It panics if either argument is nil.
-func NewCloudFrontRWStore(cf *CloudFrontROStore, s3 *S3Store) *CloudFrontRWStore {
+func NewCloudFrontRWStore(cf *ITTTStore, s3 *S3Store) *CloudFrontRWStore {
 	if cf == nil || s3 == nil {
 		panic("both stores must be set")
 	}
@@ -30,8 +33,10 @@ func (c *CloudFrontRWStore) Has(hash string) (bool, error) {
 }
 
 // Get gets the blob from Cloudfront.
-func (c *CloudFrontRWStore) Get(hash string) (stream.Blob, error) {
+func (c *CloudFrontRWStore) Get(hash string) (stream.Blob, shared.BlobTrace, error) {
-	return c.cf.Get(hash)
+	start := time.Now()
+	blob, trace, err := c.cf.Get(hash)
+	return blob, trace.Stack(time.Since(start), c.Name()), err
 }
 
 // Put stores the blob on S3
@@ -48,3 +53,10 @@ func (c *CloudFrontRWStore) PutSD(hash string, blob stream.Blob) error {
 func (c *CloudFrontRWStore) Delete(hash string) error {
 	return c.s3.Delete(hash)
 }
+
+// Shutdown shuts down the store gracefully
+func (c *CloudFrontRWStore) Shutdown() {
+	c.s3.Shutdown()
+	c.cf.Shutdown()
+	return
+}

store/dbbacked.go

@@ -3,11 +3,12 @@ package store
 import (
 	"encoding/json"
 	"sync"
-
+	"time"
-	"github.com/lbryio/reflector.go/db"
 
 	"github.com/lbryio/lbry.go/v2/extras/errors"
 	"github.com/lbryio/lbry.go/v2/stream"
+	"github.com/lbryio/reflector.go/db"
+	"github.com/lbryio/reflector.go/shared"
 
 	log "github.com/sirupsen/logrus"
 )
@@ -18,11 +19,12 @@ type DBBackedStore struct {
 	db           *db.SQL
 	blockedMu    sync.RWMutex
 	blocked      map[string]bool
+	deleteOnMiss bool
 }
 
 // NewDBBackedStore returns an initialized store pointer.
-func NewDBBackedStore(blobs BlobStore, db *db.SQL) *DBBackedStore {
+func NewDBBackedStore(blobs BlobStore, db *db.SQL, deleteOnMiss bool) *DBBackedStore {
-	return &DBBackedStore{blobs: blobs, db: db}
+	return &DBBackedStore{blobs: blobs, db: db, deleteOnMiss: deleteOnMiss}
 }
 
 const nameDBBacked = "db-backed"
@@ -32,20 +34,29 @@ func (d *DBBackedStore) Name() string { return nameDBBacked }
 
 // Has returns true if the blob is in the store
 func (d *DBBackedStore) Has(hash string) (bool, error) {
-	return d.db.HasBlob(hash)
+	return d.db.HasBlob(hash, false)
 }
 
 // Get gets the blob
-func (d *DBBackedStore) Get(hash string) (stream.Blob, error) {
+func (d *DBBackedStore) Get(hash string) (stream.Blob, shared.BlobTrace, error) {
-	has, err := d.db.HasBlob(hash)
+	start := time.Now()
+	has, err := d.db.HasBlob(hash, true)
 	if err != nil {
-		return nil, err
+		return nil, shared.NewBlobTrace(time.Since(start), d.Name()), err
 	}
 	if !has {
-		return nil, ErrBlobNotFound
+		return nil, shared.NewBlobTrace(time.Since(start), d.Name()), ErrBlobNotFound
 	}
 
-	return d.blobs.Get(hash)
+	b, stack, err := d.blobs.Get(hash)
+	if d.deleteOnMiss && errors.Is(err, ErrBlobNotFound) {
+		e2 := d.Delete(hash)
+		if e2 != nil {
+			log.Errorf("error while deleting blob from db: %s", errors.FullTrace(err))
+		}
+	}
+
+	return b, stack.Stack(time.Since(start), d.Name()), err
 }
 
 // Put stores the blob in the S3 store and stores the blob information in the DB.
@@ -100,7 +111,7 @@ func (d *DBBackedStore) Block(hash string) error {
 		return err
 	}
 
-	has, err := d.db.HasBlob(hash)
+	has, err := d.db.HasBlob(hash, false)
 	if err != nil {
 		return err
 	}
@@ -182,3 +193,9 @@ func (d *DBBackedStore) initBlocked() error {
 
 	return err
 }
+
+// Shutdown shuts down the store gracefully
+func (d *DBBackedStore) Shutdown() {
+	d.blobs.Shutdown()
+	return
+}

store/disk.go

@@ -1,15 +1,42 @@
 package store
 
 import (
+	"crypto/sha512"
+	"encoding/hex"
+	"fmt"
 	"io/ioutil"
 	"os"
 	"path"
+	"runtime"
+	"time"
 
 	"github.com/lbryio/lbry.go/v2/extras/errors"
 	"github.com/lbryio/lbry.go/v2/stream"
+	"github.com/lbryio/reflector.go/shared"
 	"github.com/lbryio/reflector.go/store/speedwalk"
+	log "github.com/sirupsen/logrus"
+	"go.uber.org/atomic"
 )
 
+func init() {
+	writeCh = make(chan writeRequest)
+	for i := 0; i < runtime.NumCPU(); i++ {
+		go func() {
+			for {
+				select {
+				case r := <-writeCh:
+					err := ioutil.WriteFile(r.filename, r.data, r.perm)
+					if err != nil {
+						log.Errorf("could not write file %s to disk, failed with error: %s", r.filename, err.Error())
+					}
+				}
+			}
+		}()
+	}
+}
+
+var writeCh chan writeRequest
+
 // DiskStore stores blobs on a local disk
 type DiskStore struct {
 	// the location of blobs on disk
@@ -19,8 +46,12 @@ type DiskStore struct {
 
 	// true if initOnce ran, false otherwise
 	initialized bool
+
+	concurrentChecks atomic.Int32
 }
 
+const maxConcurrentChecks = 3
+
 // NewDiskStore returns an initialized file disk store pointer.
 func NewDiskStore(dir string, prefixLength int) *DiskStore {
 	return &DiskStore{
@@ -52,21 +83,40 @@ func (d *DiskStore) Has(hash string) (bool, error) {
 }
 
 // Get returns the blob or an error if the blob doesn't exist.
-func (d *DiskStore) Get(hash string) (stream.Blob, error) {
+func (d *DiskStore) Get(hash string) (stream.Blob, shared.BlobTrace, error) {
+	start := time.Now()
 	err := d.initOnce()
 	if err != nil {
-		return nil, err
+		return nil, shared.NewBlobTrace(time.Since(start), d.Name()), err
 	}
 
 	blob, err := ioutil.ReadFile(d.path(hash))
 	if err != nil {
 		if os.IsNotExist(err) {
-			return nil, errors.Err(ErrBlobNotFound)
+			return nil, shared.NewBlobTrace(time.Since(start), d.Name()), errors.Err(ErrBlobNotFound)
 		}
-		return nil, errors.Err(err)
+		return nil, shared.NewBlobTrace(time.Since(start), d.Name()), errors.Err(err)
 	}
 
-	return blob, nil
+	// this is a rather poor yet effective way of throttling how many blobs can be checked concurrently
+	// poor because there is a possible race condition between the check and the actual +1
+	if d.concurrentChecks.Load() < maxConcurrentChecks {
+		d.concurrentChecks.Add(1)
+		defer d.concurrentChecks.Sub(1)
+		hashBytes := sha512.Sum384(blob)
+		readHash := hex.EncodeToString(hashBytes[:])
+		if hash != readHash {
+			message := fmt.Sprintf("[%s] found a broken blob while reading from disk. Actual hash: %s", hash, readHash)
+			log.Errorf("%s", message)
+			err := d.Delete(hash)
+			if err != nil {
+				return nil, shared.NewBlobTrace(time.Since(start), d.Name()), err
+			}
+			return nil, shared.NewBlobTrace(time.Since(start), d.Name()), errors.Err(message)
+		}
+	}
+
+	return blob, shared.NewBlobTrace(time.Since(start), d.Name()), nil
 }
 
 // Put stores the blob on disk
@@ -80,8 +130,7 @@ func (d *DiskStore) Put(hash string, blob stream.Blob) error {
 	if err != nil {
 		return err
 	}
-
+	writeFile(d.path(hash), blob, 0644)
-	err = ioutil.WriteFile(d.path(hash), blob, 0644)
 	return errors.Err(err)
 }
 
@@ -147,3 +196,22 @@ func (d *DiskStore) initOnce() error {
 	d.initialized = true
 	return nil
 }
+
+type writeRequest struct {
+	filename string
+	data     []byte
+	perm     os.FileMode
+}
+
+// Shutdown shuts down the store gracefully
+func (d *DiskStore) Shutdown() {
+	return
+}
+
+func writeFile(filename string, data []byte, perm os.FileMode) {
+	writeCh <- writeRequest{
+		filename: filename,
+		data:     data,
+		perm:     perm,
+	}
+}

store/disk_test.go

@@ -19,7 +19,7 @@ func TestDiskStore_Get(t *testing.T) {
 	defer os.RemoveAll(tmpDir)
 	d := NewDiskStore(tmpDir, 2)
 
-	hash := "1234567890"
+	hash := "f428b8265d65dad7f8ffa52922bba836404cbd62f3ecfe10adba6b444f8f658938e54f5981ac4de39644d5b93d89a94b"
 	data := []byte("oyuntyausntoyaunpdoyruoyduanrstjwfjyuwf")
 
 	expectedPath := path.Join(tmpDir, hash[:2], hash)
@@ -28,7 +28,7 @@ func TestDiskStore_Get(t *testing.T) {
 	err = ioutil.WriteFile(expectedPath, data, os.ModePerm)
 	require.NoError(t, err)
 
-	blob, err := d.Get(hash)
+	blob, _, err := d.Get(hash)
 	assert.NoError(t, err)
 	assert.EqualValues(t, data, blob)
 }
@@ -39,7 +39,7 @@ func TestDiskStore_GetNonexistentBlob(t *testing.T) {
 	defer os.RemoveAll(tmpDir)
 	d := NewDiskStore(tmpDir, 2)
 
-	blob, err := d.Get("nonexistent")
+	blob, _, err := d.Get("nonexistent")
 	assert.Nil(t, blob)
 	assert.True(t, errors.Is(err, ErrBlobNotFound))
 }

store/http.go

@@ -0,0 +1,160 @@
+package store
+
+import (
+	"bytes"
+	"io"
+	"io/ioutil"
+	"net"
+	"net/http"
+	"sync"
+	"time"
+
+	"github.com/lbryio/reflector.go/internal/metrics"
+	"github.com/lbryio/reflector.go/shared"
+
+	"github.com/lbryio/lbry.go/v2/extras/errors"
+	"github.com/lbryio/lbry.go/v2/stream"
+)
+
+// NoopStore is a store that does nothing
+type HttpStore struct {
+	upstream   string
+	httpClient *http.Client
+}
+
+func NewHttpStore(upstream string) *HttpStore {
+	return &HttpStore{
+		upstream:   "http://" + upstream,
+		httpClient: getClient(),
+	}
+}
+
+const nameHttp = "http"
+
+func (n *HttpStore) Name() string { return nameNoop }
+func (n *HttpStore) Has(hash string) (bool, error) {
+	url := n.upstream + "/blob?hash=" + hash
+
+	req, err := http.NewRequest("HEAD", url, nil)
+	if err != nil {
+		return false, errors.Err(err)
+	}
+
+	res, err := n.httpClient.Do(req)
+	if err != nil {
+		return false, errors.Err(err)
+	}
+	defer res.Body.Close()
+	if res.StatusCode == http.StatusNotFound {
+		return false, nil
+	}
+	if res.StatusCode == http.StatusNoContent {
+		return true, nil
+	}
+	var body []byte
+	if res.Body != nil {
+		body, _ = ioutil.ReadAll(res.Body)
+	}
+	return false, errors.Err("upstream error. Status code: %d (%s)", res.StatusCode, string(body))
+}
+
+func (n *HttpStore) Get(hash string) (stream.Blob, shared.BlobTrace, error) {
+	start := time.Now()
+	url := n.upstream + "/blob?hash=" + hash
+
+	req, err := http.NewRequest("GET", url, nil)
+	if err != nil {
+		return nil, shared.NewBlobTrace(time.Since(start), n.Name()), errors.Err(err)
+	}
+
+	res, err := n.httpClient.Do(req)
+	if err != nil {
+		return nil, shared.NewBlobTrace(time.Since(start), n.Name()), errors.Err(err)
+	}
+	defer res.Body.Close()
+	tmp := getBuffer()
+	defer putBuffer(tmp)
+	serialized := res.Header.Get("Via")
+	trace := shared.NewBlobTrace(time.Since(start), n.Name())
+	if serialized != "" {
+		parsedTrace, err := shared.Deserialize(serialized)
+		if err != nil {
+			return nil, shared.NewBlobTrace(time.Since(start), n.Name()), err
+		}
+		trace = *parsedTrace
+	}
+
+	if res.StatusCode == http.StatusNotFound {
+		return nil, trace.Stack(time.Since(start), n.Name()), ErrBlobNotFound
+	}
+	if res.StatusCode == http.StatusOK {
+		written, err := io.Copy(tmp, res.Body)
+		if err != nil {
+			return nil, trace.Stack(time.Since(start), n.Name()), errors.Err(err)
+		}
+
+		blob := make([]byte, written)
+		copy(blob, tmp.Bytes())
+		metrics.MtrInBytesHttp.Add(float64(len(blob)))
+		return blob, trace.Stack(time.Since(start), n.Name()), nil
+	}
+	var body []byte
+	if res.Body != nil {
+		body, _ = ioutil.ReadAll(res.Body)
+	}
+
+	return nil, trace.Stack(time.Since(start), n.Name()), errors.Err("upstream error. Status code: %d (%s)", res.StatusCode, string(body))
+}
+
+func (n *HttpStore) Put(string, stream.Blob) error {
+	return shared.ErrNotImplemented
+}
+func (n *HttpStore) PutSD(string, stream.Blob) error {
+	return shared.ErrNotImplemented
+}
+func (n *HttpStore) Delete(string) error {
+	return shared.ErrNotImplemented
+}
+func (n *HttpStore) Shutdown() { return }
+
+// buffer pool to reduce GC
+// https://www.captaincodeman.com/2017/06/02/golang-buffer-pool-gotcha
+var buffers = sync.Pool{
+	// New is called when a new instance is needed
+	New: func() interface{} {
+		buf := make([]byte, 0, stream.MaxBlobSize)
+		return bytes.NewBuffer(buf)
+	},
+}
+
+// getBuffer fetches a buffer from the pool
+func getBuffer() *bytes.Buffer {
+	return buffers.Get().(*bytes.Buffer)
+}
+
+// putBuffer returns a buffer to the pool
+func putBuffer(buf *bytes.Buffer) {
+	buf.Reset()
+	buffers.Put(buf)
+}
+
+// getClient gets an http client that's customized to be more performant when dealing with blobs of 2MB in size (most of our blobs)
+func getClient() *http.Client {
+	// Customize the Transport to have larger connection pool
+	defaultTransport := &http.Transport{
+		DialContext: (&net.Dialer{
+			Timeout:   30 * time.Second,
+			KeepAlive: 30 * time.Second,
+		}).DialContext,
+		ForceAttemptHTTP2:     true,
+		MaxIdleConns:          100,
+		IdleConnTimeout:       90 * time.Second,
+		TLSHandshakeTimeout:   10 * time.Second,
+		ExpectContinueTimeout: 1 * time.Second,
+		DisableCompression:    true,
+		MaxIdleConnsPerHost:   100,
+		ReadBufferSize:        stream.MaxBlobSize + 1024*10, //add an extra few KBs to make sure it fits the extra information
+	}
+
+	return &http.Client{Transport: defaultTransport}
+}

store/ittt.go

@@ -0,0 +1,75 @@
+package store
+
+import (
+	"time"
+
+	"github.com/lbryio/lbry.go/v2/extras/errors"
+	"github.com/lbryio/lbry.go/v2/stream"
+
+	"github.com/lbryio/reflector.go/internal/metrics"
+	"github.com/lbryio/reflector.go/shared"
+)
+
+// ITTT store performs an operation on this storage, if this fails, it attempts to run it on that
+type ITTTStore struct {
+	this, that BlobStore
+}
+
+// NewCachingStore makes a new caching disk store and returns a pointer to it.
+func NewITTTStore(this, that BlobStore) *ITTTStore {
+	return &ITTTStore{
+		this: this,
+		that: that,
+	}
+}
+
+const nameIttt = "ittt"
+
+// Name is the cache type name
+func (c *ITTTStore) Name() string { return nameIttt }
+
+// Has checks the cache and then the origin for a hash. It returns true if either store has it.
+func (c *ITTTStore) Has(hash string) (bool, error) {
+	has, err := c.this.Has(hash)
+	if err != nil || !has {
+		has, err = c.that.Has(hash)
+	}
+	return has, err
+}
+
+// Get tries to get the blob from this first, falling back to that.
+func (c *ITTTStore) Get(hash string) (stream.Blob, shared.BlobTrace, error) {
+	start := time.Now()
+	blob, trace, err := c.this.Get(hash)
+	if err == nil {
+		metrics.ThisHitCount.Inc()
+		return blob, trace.Stack(time.Since(start), c.Name()), err
+	}
+
+	blob, trace, err = c.that.Get(hash)
+	if err != nil {
+		return nil, trace.Stack(time.Since(start), c.Name()), err
+	}
+	metrics.ThatHitCount.Inc()
+	return blob, trace.Stack(time.Since(start), c.Name()), nil
+}
+
+// Put not implemented
+func (c *ITTTStore) Put(hash string, blob stream.Blob) error {
+	return errors.Err(shared.ErrNotImplemented)
+}
+
+// PutSD not implemented
+func (c *ITTTStore) PutSD(hash string, blob stream.Blob) error {
+	return errors.Err(shared.ErrNotImplemented)
+}
+
+// Delete not implemented
+func (c *ITTTStore) Delete(hash string) error {
+	return errors.Err(shared.ErrNotImplemented)
+}
+
+// Shutdown shuts down the store gracefully
+func (c *ITTTStore) Shutdown() {
+	return
+}

store/lfuda.go

@@ -0,0 +1,132 @@
+package store
+
+import (
+	"time"
+
+	"github.com/bparli/lfuda-go"
+	"github.com/lbryio/lbry.go/v2/extras/errors"
+	"github.com/lbryio/lbry.go/v2/stream"
+	"github.com/lbryio/reflector.go/internal/metrics"
+	"github.com/lbryio/reflector.go/shared"
+	"github.com/sirupsen/logrus"
+)
+
+// LRUStore adds a max cache size and LRU eviction to a BlobStore
+type LFUDAStore struct {
+	// underlying store
+	store BlobStore
+	// lfuda implementation
+	lfuda *lfuda.Cache
+}
+
+// NewLRUStore initialize a new LRUStore
+func NewLFUDAStore(component string, store BlobStore, maxSize float64) *LFUDAStore {
+	lfuda := lfuda.NewGDSFWithEvict(maxSize, func(key interface{}, value interface{}) {
+		metrics.CacheLRUEvictCount.With(metrics.CacheLabels(store.Name(), component)).Inc()
+		_ = store.Delete(key.(string)) // TODO: log this error. may happen if underlying entry is gone but cache entry still there
+	})
+	l := &LFUDAStore{
+		store: store,
+		lfuda: lfuda,
+	}
+	go func() {
+		if lstr, ok := store.(lister); ok {
+			err := l.loadExisting(lstr, int(maxSize))
+			if err != nil {
+				panic(err) // TODO: what should happen here? panic? return nil? just keep going?
+			}
+		}
+	}()
+
+	return l
+}
+
+const nameLFUDA = "lfuda"
+
+// Name is the cache type name
+func (l *LFUDAStore) Name() string { return nameLFUDA }
+
+// Has returns whether the blob is in the store, without updating the recent-ness.
+func (l *LFUDAStore) Has(hash string) (bool, error) {
+	return l.lfuda.Contains(hash), nil
+}
+
+// Get returns the blob or an error if the blob doesn't exist.
+func (l *LFUDAStore) Get(hash string) (stream.Blob, shared.BlobTrace, error) {
+	start := time.Now()
+	_, has := l.lfuda.Get(hash)
+	if !has {
+		return nil, shared.NewBlobTrace(time.Since(start), l.Name()), errors.Err(ErrBlobNotFound)
+	}
+	blob, stack, err := l.store.Get(hash)
+	if errors.Is(err, ErrBlobNotFound) {
+		// Blob disappeared from underlying store
+		l.lfuda.Remove(hash)
+	}
+	return blob, stack.Stack(time.Since(start), l.Name()), err
+}
+
+// Put stores the blob. Following LFUDA rules it's not guaranteed that a SET will store the value!!!
+func (l *LFUDAStore) Put(hash string, blob stream.Blob) error {
+	l.lfuda.Set(hash, true)
+	has, _ := l.Has(hash)
+	if has {
+		err := l.store.Put(hash, blob)
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// PutSD stores the sd blob. Following LFUDA rules it's not guaranteed that a SET will store the value!!!
+func (l *LFUDAStore) PutSD(hash string, blob stream.Blob) error {
+	l.lfuda.Set(hash, true)
+	has, _ := l.Has(hash)
+	if has {
+		err := l.store.PutSD(hash, blob)
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// Delete deletes the blob from the store
+func (l *LFUDAStore) Delete(hash string) error {
+	err := l.store.Delete(hash)
+	if err != nil {
+		return err
+	}
+
+	// This must come after store.Delete()
+	// Remove triggers onEvict function, which also tries to delete blob from store
+	// We need to delete it manually first so any errors can be propagated up
+	l.lfuda.Remove(hash)
+	return nil
+}
+
+// loadExisting imports existing blobs from the underlying store into the LRU cache
+func (l *LFUDAStore) loadExisting(store lister, maxItems int) error {
+	logrus.Infof("loading at most %d items", maxItems)
+	existing, err := store.list()
+	if err != nil {
+		return err
+	}
+	logrus.Infof("read %d files from underlying store", len(existing))
+
+	added := 0
+	for _, h := range existing {
+		l.lfuda.Set(h, true)
+		added++
+		if maxItems > 0 && added >= maxItems { // underlying cache is bigger than the cache
+			break
+		}
+	}
+	return nil
+}
+
+// Shutdown shuts down the store gracefully
+func (l *LFUDAStore) Shutdown() {
+	return
+}

store/lfuda_test.go

@@ -0,0 +1,136 @@
+package store
+
+import (
+	"io/ioutil"
+	"os"
+	"reflect"
+	"testing"
+	"time"
+
+	"github.com/lbryio/lbry.go/v2/extras/errors"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+const cacheMaxSize = 3
+
+func getTestLFUDAStore() (*LFUDAStore, *MemStore) {
+	m := NewMemStore()
+	return NewLFUDAStore("test", m, cacheMaxSize), m
+}
+
+func TestFUDAStore_Eviction(t *testing.T) {
+	lfuda, mem := getTestLFUDAStore()
+	b := []byte("x")
+	err := lfuda.Put("one", b)
+	require.NoError(t, err)
+	err = lfuda.Put("two", b)
+	require.NoError(t, err)
+	err = lfuda.Put("three", b)
+	require.NoError(t, err)
+	err = lfuda.Put("four", b)
+	require.NoError(t, err)
+	err = lfuda.Put("five", b)
+	require.NoError(t, err)
+	err = lfuda.Put("five", b)
+	require.NoError(t, err)
+	err = lfuda.Put("four", b)
+	require.NoError(t, err)
+	err = lfuda.Put("two", b)
+	require.NoError(t, err)
+
+	_, _, err = lfuda.Get("five")
+	require.NoError(t, err)
+	_, _, err = lfuda.Get("four")
+	require.NoError(t, err)
+	_, _, err = lfuda.Get("two")
+	require.NoError(t, err)
+	assert.Equal(t, cacheMaxBlobs, len(mem.Debug()))
+
+	for k, v := range map[string]bool{
+		"one":   false,
+		"two":   true,
+		"three": false,
+		"four":  true,
+		"five":  true,
+		"six":   false,
+	} {
+		has, err := lfuda.Has(k)
+		assert.NoError(t, err)
+		assert.Equal(t, v, has)
+	}
+
+	lfuda.Get("two")  // touch so it stays in cache
+	lfuda.Get("five") // touch so it stays in cache
+	lfuda.Put("six", b)
+
+	assert.Equal(t, cacheMaxBlobs, len(mem.Debug()))
+
+	for k, v := range map[string]bool{
+		"one":   false,
+		"two":   true,
+		"three": false,
+		"four":  false,
+		"five":  true,
+		"six":   true,
+	} {
+		has, err := lfuda.Has(k)
+		assert.NoError(t, err)
+		assert.Equal(t, v, has)
+	}
+
+	err = lfuda.Delete("six")
+	assert.NoError(t, err)
+	err = lfuda.Delete("five")
+	assert.NoError(t, err)
+	err = lfuda.Delete("two")
+	assert.NoError(t, err)
+	assert.Equal(t, 0, len(mem.Debug()))
+}
+
+func TestFUDAStore_UnderlyingBlobMissing(t *testing.T) {
+	lfuda, mem := getTestLFUDAStore()
+	hash := "hash"
+	b := []byte("this is a blob of stuff")
+	err := lfuda.Put(hash, b)
+	require.NoError(t, err)
+
+	err = mem.Delete(hash)
+	require.NoError(t, err)
+
+	// hash still exists in lru
+	assert.True(t, lfuda.lfuda.Contains(hash))
+
+	blob, _, err := lfuda.Get(hash)
+	assert.Nil(t, blob)
+	assert.True(t, errors.Is(err, ErrBlobNotFound), "expected (%s) %s, got (%s) %s",
+		reflect.TypeOf(ErrBlobNotFound).String(), ErrBlobNotFound.Error(),
+		reflect.TypeOf(err).String(), err.Error())
+
+	// lru.Get() removes hash if underlying store doesn't have it
+	assert.False(t, lfuda.lfuda.Contains(hash))
+}
+
+func TestFUDAStore_loadExisting(t *testing.T) {
+	tmpDir, err := ioutil.TempDir("", "reflector_test_*")
+	require.NoError(t, err)
+	defer os.RemoveAll(tmpDir)
+	d := NewDiskStore(tmpDir, 2)
+
+	hash := "hash"
+	b := []byte("this is a blob of stuff")
+	err = d.Put(hash, b)
+	require.NoError(t, err)
+
+	existing, err := d.list()
+	require.NoError(t, err)
+	require.Equal(t, 1, len(existing), "blob should exist in cache")
+	assert.Equal(t, hash, existing[0])
+
+	lfuda := NewLFUDAStore("test", d, 3) // lru should load existing blobs when it's created
+	time.Sleep(100 * time.Millisecond)   // async load so let's wait...
+	has, err := lfuda.Has(hash)
+	require.NoError(t, err)
+	assert.True(t, has, "hash should be loaded from disk store but it's not")
+}

store/lru.go

@@ -1,11 +1,16 @@
 package store
 
 import (
+	"time"
+
+	"github.com/lbryio/reflector.go/internal/metrics"
+	"github.com/lbryio/reflector.go/shared"
+
 	"github.com/lbryio/lbry.go/v2/extras/errors"
 	"github.com/lbryio/lbry.go/v2/stream"
-	"github.com/lbryio/reflector.go/internal/metrics"
 
-	golru "github.com/hashicorp/golang-lru"
+	"github.com/bluele/gcache"
+	"github.com/sirupsen/logrus"
 )
 
 // LRUStore adds a max cache size and LRU eviction to a BlobStore
@@ -13,56 +18,54 @@ type LRUStore struct {
 	// underlying store
 	store BlobStore
 	// lru implementation
-	lru *golru.Cache
+	lru gcache.Cache
 }
 
 // NewLRUStore initialize a new LRUStore
 func NewLRUStore(component string, store BlobStore, maxItems int) *LRUStore {
-	lru, err := golru.NewWithEvict(maxItems, func(key interface{}, value interface{}) {
-		metrics.CacheLRUEvictCount.With(metrics.CacheLabels(store.Name(), component)).Inc()
-		_ = store.Delete(key.(string)) // TODO: log this error. may happen if underlying entry is gone but cache entry still there
-	})
-	if err != nil {
-		panic(err)
-	}
-
 	l := &LRUStore{
 		store: store,
-		lru:   lru,
 	}
+	l.lru = gcache.New(maxItems).ARC().EvictedFunc(func(key, value interface{}) {
+		metrics.CacheLRUEvictCount.With(metrics.CacheLabels(l.Name(), component)).Inc()
+		_ = store.Delete(key.(string))
+	}).Build()
 
+	go func() {
 		if lstr, ok := store.(lister); ok {
-		err = l.loadExisting(lstr, maxItems)
+			err := l.loadExisting(lstr, maxItems)
 			if err != nil {
 				panic(err) // TODO: what should happen here? panic? return nil? just keep going?
 			}
 		}
+	}()
 
 	return l
 }
 
-const nameLRU = "lru"
-
 // Name is the cache type name
-func (l *LRUStore) Name() string { return nameLRU }
+func (l *LRUStore) Name() string {
+	return "lru_" + l.store.Name()
+}
 
 // Has returns whether the blob is in the store, without updating the recent-ness.
 func (l *LRUStore) Has(hash string) (bool, error) {
-	return l.lru.Contains(hash), nil
+	return l.lru.Has(hash), nil
 }
 
 // Get returns the blob or an error if the blob doesn't exist.
-func (l *LRUStore) Get(hash string) (stream.Blob, error) {
+func (l *LRUStore) Get(hash string) (stream.Blob, shared.BlobTrace, error) {
-	_, has := l.lru.Get(hash)
+	start := time.Now()
-	if !has {
+	_, err := l.lru.Get(hash)
-		return nil, errors.Err(ErrBlobNotFound)
+	if err != nil {
+		return nil, shared.NewBlobTrace(time.Since(start), l.Name()), errors.Err(ErrBlobNotFound)
 	}
-	blob, err := l.store.Get(hash)
+	blob, stack, err := l.store.Get(hash)
 	if errors.Is(err, ErrBlobNotFound) {
 		// Blob disappeared from underlying store
 		l.lru.Remove(hash)
 	}
-	return blob, err
+	return blob, stack.Stack(time.Since(start), l.Name()), err
 }
 
 // Put stores the blob
@@ -72,7 +75,7 @@ func (l *LRUStore) Put(hash string, blob stream.Blob) error {
 		return err
 	}
 
-	l.lru.Add(hash, true)
+	l.lru.Set(hash, true)
 	return nil
 }
 
@@ -83,7 +86,7 @@ func (l *LRUStore) PutSD(hash string, blob stream.Blob) error {
 		return err
 	}
 
-	l.lru.Add(hash, true)
+	_ = l.lru.Set(hash, true)
 	return nil
 }
 
@@ -103,14 +106,15 @@ func (l *LRUStore) Delete(hash string) error {
 
 // loadExisting imports existing blobs from the underlying store into the LRU cache
 func (l *LRUStore) loadExisting(store lister, maxItems int) error {
+	logrus.Infof("loading at most %d items", maxItems)
 	existing, err := store.list()
 	if err != nil {
 		return err
 	}
-
+	logrus.Infof("read %d files from disk", len(existing))
 	added := 0
 	for _, h := range existing {
-		l.lru.Add(h, true)
+		l.lru.Set(h, true)
 		added++
 		if maxItems > 0 && added >= maxItems { // underlying cache is bigger than LRU cache
 			break
@@ -118,3 +122,8 @@ func (l *LRUStore) loadExisting(store lister, maxItems int) error {
 	}
 	return nil
 }
+
+// Shutdown shuts down the store gracefully
+func (l *LRUStore) Shutdown() {
+	return
+}

store/lru_test.go

@@ -5,6 +5,7 @@ import (
 	"os"
 	"reflect"
 	"testing"
+	"time"
 
 	"github.com/lbryio/lbry.go/v2/extras/errors"
 
@@ -86,16 +87,16 @@ func TestLRUStore_UnderlyingBlobMissing(t *testing.T) {
 	require.NoError(t, err)
 
 	// hash still exists in lru
-	assert.True(t, lru.lru.Contains(hash))
+	assert.True(t, lru.lru.Has(hash))
 
-	blob, err := lru.Get(hash)
+	blob, _, err := lru.Get(hash)
 	assert.Nil(t, blob)
 	assert.True(t, errors.Is(err, ErrBlobNotFound), "expected (%s) %s, got (%s) %s",
 		reflect.TypeOf(ErrBlobNotFound).String(), ErrBlobNotFound.Error(),
 		reflect.TypeOf(err).String(), err.Error())
 
 	// lru.Get() removes hash if underlying store doesn't have it
-	assert.False(t, lru.lru.Contains(hash))
+	assert.False(t, lru.lru.Has(hash))
 }
 
 func TestLRUStore_loadExisting(t *testing.T) {
@@ -115,6 +116,7 @@ func TestLRUStore_loadExisting(t *testing.T) {
 	assert.Equal(t, hash, existing[0])
 
 	lru := NewLRUStore("test", d, 3)   // lru should load existing blobs when it's created
+	time.Sleep(100 * time.Millisecond) // async load so let's wait...
 	has, err := lru.Has(hash)
 	require.NoError(t, err)
 	assert.True(t, has, "hash should be loaded from disk store but it's not")

store/memory.go

@@ -2,9 +2,11 @@ package store
 
 import (
 	"sync"
+	"time"
 
 	"github.com/lbryio/lbry.go/v2/extras/errors"
 	"github.com/lbryio/lbry.go/v2/stream"
+	"github.com/lbryio/reflector.go/shared"
 )
 
 // MemStore is an in memory only blob store with no persistence.
@@ -34,14 +36,15 @@ func (m *MemStore) Has(hash string) (bool, error) {
 }
 
 // Get returns the blob byte slice if present and errors if the blob is not found.
-func (m *MemStore) Get(hash string) (stream.Blob, error) {
+func (m *MemStore) Get(hash string) (stream.Blob, shared.BlobTrace, error) {
+	start := time.Now()
 	m.mu.RLock()
 	defer m.mu.RUnlock()
 	blob, ok := m.blobs[hash]
 	if !ok {
-		return nil, errors.Err(ErrBlobNotFound)
+		return nil, shared.NewBlobTrace(time.Since(start), m.Name()), errors.Err(ErrBlobNotFound)
 	}
-	return blob, nil
+	return blob, shared.NewBlobTrace(time.Since(start), m.Name()), nil
 }
 
 // Put stores the blob in memory
@@ -71,3 +74,8 @@ func (m *MemStore) Debug() map[string]stream.Blob {
 	defer m.mu.RUnlock()
 	return m.blobs
 }
+
+// Shutdown shuts down the store gracefully
+func (m *MemStore) Shutdown() {
+	return
+}

store/memory_test.go

@@ -25,7 +25,7 @@ func TestMemStore_Get(t *testing.T) {
 		t.Error("error getting memory blob - ", err)
 	}
 
-	gotBlob, err := s.Get(hash)
+	gotBlob, _, err := s.Get(hash)
 	if err != nil {
 		t.Errorf("Expected no error, got %v", err)
 	}
@@ -33,7 +33,7 @@ func TestMemStore_Get(t *testing.T) {
 		t.Error("Got blob that is different from expected blob")
 	}
 
-	missingBlob, err := s.Get("nonexistent hash")
+	missingBlob, _, err := s.Get("nonexistent hash")
 	if err == nil {
 		t.Errorf("Expected ErrBlobNotFound, got nil")
 	}

store/noop.go

@@ -1,6 +1,11 @@
 package store
 
-import "github.com/lbryio/lbry.go/v2/stream"
+import (
+	"time"
+
+	"github.com/lbryio/lbry.go/v2/stream"
+	"github.com/lbryio/reflector.go/shared"
+)
 
 // NoopStore is a store that does nothing
 type NoopStore struct{}
@@ -9,7 +14,10 @@ const nameNoop = "noop"
 
 func (n *NoopStore) Name() string               { return nameNoop }
 func (n *NoopStore) Has(_ string) (bool, error) { return false, nil }
-func (n *NoopStore) Get(_ string) (stream.Blob, error)   { return nil, nil }
+func (n *NoopStore) Get(_ string) (stream.Blob, shared.BlobTrace, error) {
+	return nil, shared.NewBlobTrace(time.Since(time.Now()), n.Name()), nil
+}
 func (n *NoopStore) Put(_ string, _ stream.Blob) error   { return nil }
 func (n *NoopStore) PutSD(_ string, _ stream.Blob) error { return nil }
 func (n *NoopStore) Delete(_ string) error               { return nil }
+func (n *NoopStore) Shutdown()                           { return }

store/s3.go

@@ -8,6 +8,7 @@ import (
 	"github.com/lbryio/lbry.go/v2/extras/errors"
 	"github.com/lbryio/lbry.go/v2/stream"
 	"github.com/lbryio/reflector.go/internal/metrics"
+	"github.com/lbryio/reflector.go/shared"
 
 	"github.com/aws/aws-sdk-go/aws"
 	"github.com/aws/aws-sdk-go/aws/awserr"
@@ -65,17 +66,18 @@ func (s *S3Store) Has(hash string) (bool, error) {
 }
 
 // Get returns the blob slice if present or errors on S3.
-func (s *S3Store) Get(hash string) (stream.Blob, error) {
+func (s *S3Store) Get(hash string) (stream.Blob, shared.BlobTrace, error) {
+	start := time.Now()
 	//Todo-Need to handle error for blob doesn't exist for consistency.
 	err := s.initOnce()
 	if err != nil {
-		return nil, err
+		return nil, shared.NewBlobTrace(time.Since(start), s.Name()), err
 	}
 
 	log.Debugf("Getting %s from S3", hash[:8])
 	defer func(t time.Time) {
 		log.Debugf("Getting %s from S3 took %s", hash[:8], time.Since(t).String())
-	}(time.Now())
+	}(start)
 
 	buf := &aws.WriteAtBuffer{}
 	_, err = s3manager.NewDownloader(s.session).Download(buf, &s3.GetObjectInput{
@@ -86,15 +88,15 @@ func (s *S3Store) Get(hash string) (stream.Blob, error) {
 		if aerr, ok := err.(awserr.Error); ok {
 			switch aerr.Code() {
 			case s3.ErrCodeNoSuchBucket:
-				return nil, errors.Err("bucket %s does not exist", s.bucket)
+				return nil, shared.NewBlobTrace(time.Since(start), s.Name()), errors.Err("bucket %s does not exist", s.bucket)
 			case s3.ErrCodeNoSuchKey:
-				return nil, errors.Err(ErrBlobNotFound)
+				return nil, shared.NewBlobTrace(time.Since(start), s.Name()), errors.Err(ErrBlobNotFound)
 			}
 		}
-		return buf.Bytes(), err
+		return buf.Bytes(), shared.NewBlobTrace(time.Since(start), s.Name()), err
 	}
 
-	return buf.Bytes(), nil
+	return buf.Bytes(), shared.NewBlobTrace(time.Since(start), s.Name()), nil
 }
 
 // Put stores the blob on S3 or errors if S3 connection errors.
@@ -113,7 +115,8 @@ func (s *S3Store) Put(hash string, blob stream.Blob) error {
 		Bucket: aws.String(s.bucket),
 		Key:    aws.String(hash),
 		Body:   bytes.NewBuffer(blob),
-		StorageClass: aws.String(s3.StorageClassIntelligentTiering),
+		ACL:    aws.String("public-read"),
+		//StorageClass: aws.String(s3.StorageClassIntelligentTiering),
 	})
 	metrics.MtrOutBytesReflector.Add(float64(blob.Size()))
 
@@ -150,6 +153,7 @@ func (s *S3Store) initOnce() error {
 	sess, err := session.NewSession(&aws.Config{
 		Credentials: credentials.NewStaticCredentials(s.awsID, s.awsSecret, ""),
 		Region:      aws.String(s.region),
+		Endpoint:    aws.String("https://s3.wasabisys.com"),
 	})
 	if err != nil {
 		return err
@@ -158,3 +162,8 @@ func (s *S3Store) initOnce() error {
 	s.session = sess
 	return nil
 }
+
+// Shutdown shuts down the store gracefully
+func (s *S3Store) Shutdown() {
+	return
+}

store/singleflight.go

@@ -3,7 +3,9 @@ package store
 import (
 	"time"
 
+	"github.com/lbryio/lbry.go/v2/extras/errors"
 	"github.com/lbryio/reflector.go/internal/metrics"
+	"github.com/lbryio/reflector.go/shared"
 
 	"github.com/lbryio/lbry.go/v2/stream"
 
@@ -29,39 +31,98 @@ func (s *singleflightStore) Name() string {
 	return "sf_" + s.BlobStore.Name()
 }
 
+type getterResponse struct {
+	blob  stream.Blob
+	stack shared.BlobTrace
+}
+
 // Get ensures that only one request per hash is sent to the origin at a time,
 // thereby protecting against https://en.wikipedia.org/wiki/Thundering_herd_problem
-func (s *singleflightStore) Get(hash string) (stream.Blob, error) {
+func (s *singleflightStore) Get(hash string) (stream.Blob, shared.BlobTrace, error) {
-	metrics.CacheWaitingRequestsCount.With(metrics.CacheLabels(s.BlobStore.Name(), s.component)).Inc()
+	start := time.Now()
-	defer metrics.CacheWaitingRequestsCount.With(metrics.CacheLabels(s.BlobStore.Name(), s.component)).Dec()
+	metrics.CacheWaitingRequestsCount.With(metrics.CacheLabels(s.Name(), s.component)).Inc()
+	defer metrics.CacheWaitingRequestsCount.With(metrics.CacheLabels(s.Name(), s.component)).Dec()
 
-	blob, err, _ := s.sf.Do(hash, s.getter(hash))
+	gr, err, _ := s.sf.Do(hash, s.getter(hash))
 	if err != nil {
-		return nil, err
+		return nil, shared.NewBlobTrace(time.Since(start), s.Name()), err
 	}
-	return blob.(stream.Blob), nil
+	if gr == nil {
+		return nil, shared.NewBlobTrace(time.Since(start), s.Name()), errors.Err("getter response is nil")
+	}
+	rsp := gr.(getterResponse)
+	return rsp.blob, rsp.stack, nil
 }
 
 // getter returns a function that gets a blob from the origin
 // only one getter per hash will be executing at a time
 func (s *singleflightStore) getter(hash string) func() (interface{}, error) {
 	return func() (interface{}, error) {
-		metrics.CacheOriginRequestsCount.With(metrics.CacheLabels(s.BlobStore.Name(), s.component)).Inc()
+		metrics.CacheOriginRequestsCount.With(metrics.CacheLabels(s.Name(), s.component)).Inc()
-		defer metrics.CacheOriginRequestsCount.With(metrics.CacheLabels(s.BlobStore.Name(), s.component)).Dec()
+		defer metrics.CacheOriginRequestsCount.With(metrics.CacheLabels(s.Name(), s.component)).Dec()
 
 		start := time.Now()
-		blob, err := s.BlobStore.Get(hash)
+		blob, stack, err := s.BlobStore.Get(hash)
+		if err != nil {
+			return getterResponse{
+				blob:  nil,
+				stack: stack.Stack(time.Since(start), s.Name()),
+			}, err
+		}
+
+		rate := float64(len(blob)) / 1024 / 1024 / time.Since(start).Seconds()
+		metrics.CacheRetrievalSpeed.With(map[string]string{
+			metrics.LabelCacheType: s.Name(),
+			metrics.LabelComponent: s.component,
+			metrics.LabelSource:    "origin",
+		}).Set(rate)
+
+		return getterResponse{
+			blob:  blob,
+			stack: stack.Stack(time.Since(start), s.Name()),
+		}, nil
+	}
+}
+
+// Put ensures that only one request per hash is sent to the origin at a time,
+// thereby protecting against https://en.wikipedia.org/wiki/Thundering_herd_problem
+func (s *singleflightStore) Put(hash string, blob stream.Blob) error {
+	metrics.CacheWaitingRequestsCount.With(metrics.CacheLabels(s.Name(), s.component)).Inc()
+	defer metrics.CacheWaitingRequestsCount.With(metrics.CacheLabels(s.Name(), s.component)).Dec()
+
+	_, err, _ := s.sf.Do(hash, s.putter(hash, blob))
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+// putter returns a function that puts a blob from the origin
+// only one putter per hash will be executing at a time
+func (s *singleflightStore) putter(hash string, blob stream.Blob) func() (interface{}, error) {
+	return func() (interface{}, error) {
+		metrics.CacheOriginRequestsCount.With(metrics.CacheLabels(s.Name(), s.component)).Inc()
+		defer metrics.CacheOriginRequestsCount.With(metrics.CacheLabels(s.Name(), s.component)).Dec()
+
+		start := time.Now()
+		err := s.BlobStore.Put(hash, blob)
 		if err != nil {
 			return nil, err
 		}
 
 		rate := float64(len(blob)) / 1024 / 1024 / time.Since(start).Seconds()
 		metrics.CacheRetrievalSpeed.With(map[string]string{
-			metrics.LabelCacheType: s.BlobStore.Name(),
+			metrics.LabelCacheType: s.Name(),
 			metrics.LabelComponent: s.component,
 			metrics.LabelSource:    "origin",
 		}).Set(rate)
 
-		return blob, nil
+		return nil, nil
 	}
 }
+
+// Shutdown shuts down the store gracefully
+func (s *singleflightStore) Shutdown() {
+	s.BlobStore.Shutdown()
+	return
+}

store/speedwalk/speedwalk.go

@@ -6,6 +6,8 @@ import (
 	"runtime"
 	"sync"
 
+	"github.com/lbryio/reflector.go/internal/metrics"
+
 	"github.com/lbryio/lbry.go/v2/extras/errors"
 
 	"github.com/karrick/godirwalk"
@@ -24,6 +26,7 @@ func AllFiles(startDir string, basename bool) ([]string, error) {
 	paths := make([]string, 0, 1000)
 	pathWG := &sync.WaitGroup{}
 	pathWG.Add(1)
+	metrics.RoutinesQueue.WithLabelValues("speedwalk", "worker").Inc()
 	go func() {
 		defer pathWG.Done()
 		for {
@@ -60,7 +63,6 @@ func AllFiles(startDir string, basename bool) ([]string, error) {
 				walkerWG.Done()
 				goroutineLimiter <- struct{}{}
 			}()
-
 			err = godirwalk.Walk(filepath.Join(startDir, dir), &godirwalk.Options{
 				Unsorted: true, // faster this way
 				Callback: func(osPathname string, de *godirwalk.Dirent) error {
@@ -84,6 +86,5 @@ func AllFiles(startDir string, basename bool) ([]string, error) {
 
 	close(pathChan)
 	pathWG.Wait()
-
 	return paths, nil
 }

store/store.go

@@ -3,6 +3,7 @@ package store
 import (
 	"github.com/lbryio/lbry.go/v2/extras/errors"
 	"github.com/lbryio/lbry.go/v2/stream"
+	"github.com/lbryio/reflector.go/shared"
 )
 
 // BlobStore is an interface for handling blob storage.
@@ -12,13 +13,15 @@ type BlobStore interface {
 	// Does blob exist in the store.
 	Has(hash string) (bool, error)
 	// Get the blob from the store. Must return ErrBlobNotFound if blob is not in store.
-	Get(hash string) (stream.Blob, error)
+	Get(hash string) (stream.Blob, shared.BlobTrace, error)
 	// Put the blob into the store.
 	Put(hash string, blob stream.Blob) error
 	// Put an SD blob into the store.
 	PutSD(hash string, blob stream.Blob) error
 	// Delete the blob from the store.
 	Delete(hash string) error
+	// Shutdown the store gracefully
+	Shutdown()
 }
 
 // Blocklister is a store that supports blocking blobs to prevent their inclusion in the store.

wallet/client.go

@@ -6,7 +6,7 @@ import (
 
 	"github.com/lbryio/chainquery/lbrycrd"
 	"github.com/lbryio/lbry.go/v2/extras/errors"
-	"github.com/lbryio/lbry.go/v2/schema/claim"
+	"github.com/lbryio/lbry.go/v2/schema/stake"
 	types "github.com/lbryio/types/v2/go"
 
 	"github.com/btcsuite/btcutil"
@@ -140,7 +140,7 @@ func (n *Node) GetClaimInTx(txid string, nout int) (*types.Claim, error) {
 		return nil, errors.Err(err)
 	}
 
-	ch, err := claim.DecodeClaimBytes(value, "")
+	ch, err := stake.DecodeClaimBytes(value, "")
 	if err != nil {
 		return nil, errors.Err(err)
 	}