add cmd to populate db

fix store init
try fixing unreasonable db bottleneck

cmd/populatedb.go

@@ -0,0 +1,45 @@
+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 := new(db.SQL)
+	localDb.SoftDelete = true
+	localDb.TrackAccess = db.TrackAccessBlobs
+	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

@@ -179,18 +179,20 @@ func wrapWithCache(s store.BlobStore, cleanerStopper *stop.Group) store.BlobStor
 		}
 
 		localDb := new(db.SQL)
+		localDb.SoftDelete = true
 		localDb.TrackAccess = db.TrackAccessBlobs
 		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,
-			store.NewDBBackedStore(store.NewDiskStore(diskCachePath, 2), localDb, false),
+			dbBackedDiskStore,
 		)
 
-		go cleanOldestBlobs(int(realCacheSize), localDb, wrapped, cleanerStopper)
+		go cleanOldestBlobs(int(realCacheSize), localDb, dbBackedDiskStore, cleanerStopper)
 	}
 
 	diskCacheMaxSize, diskCachePath = diskCacheParams(bufferReflectorCmdDiskCache)
@@ -246,8 +248,7 @@ func diskCacheParams(diskParams string) (int, string) {
 }
 
 func cleanOldestBlobs(maxItems int, db *db.SQL, store store.BlobStore, stopper *stop.Group) {
-	const cleanupInterval = 10 * time.Second
-
+	const cleanupInterval = 10 * time.Minute
 	for {
 		select {
 		case <-stopper.Ch():
@@ -288,4 +289,5 @@ func doClean(maxItems int, db *db.SQL, store store.BlobStore, stopper *stop.Grou
 			}
 		}
 	}
+	return nil
 }

db/db.go

@@ -3,11 +3,13 @@ package db
 import (
 	"context"
 	"database/sql"
+	"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/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
@@ -88,6 +90,27 @@ func (s *SQL) AddBlob(hash string, length int, isStored bool) error {
 	return err
 }
 
+// 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
+
+	for i := 0; i < len(hash); i += batch {
+		j := i + batch
+		if j > len(hash) {
+			j = len(hash)
+		}
+		err := s.insertBlobs(hash[i:j]) // Process the batch.
+		if err != nil {
+			log.Errorf("error while inserting batch: %s", errors.FullTrace(err))
+		}
+	}
+	return nil
+}
+
 func (s *SQL) insertBlob(hash string, length int, isStored bool) (int64, error) {
 	if length <= 0 {
 		return 0, errors.Err("length must be positive")
@@ -130,6 +153,26 @@ func (s *SQL) insertBlob(hash string, length int, isStored bool) (int64, error)
 	return blobID, nil
 }
 
+func (s *SQL) insertBlobs(hashes []string) error {
+	var (
+		q    string
+		args []interface{}
+	)
+	dayAgo := time.Now().AddDate(0, 0, -1)
+	q = "insert into blob_ (hash, is_stored, length, last_accessed_at) values "
+	for _, hash := range hashes {
+		q += "(?,?,?,?),"
+		args = append(args, hash, true, stream.MaxBlobSize, dayAgo)
+	}
+	q = strings.TrimSuffix(q, ",")
+	_, err := s.exec(q, args...)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
 func (s *SQL) insertStream(hash string, sdBlobID int64) (int64, error) {
 	var (
 		q    string
@@ -180,12 +223,13 @@ 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) {
 	exists, idsNeedingTouch, err := s.hasBlobs(hashes)
-
+	go func() {
 		if s.TrackAccess == TrackAccessBlobs {
 			s.touchBlobs(idsNeedingTouch)
 		} else if s.TrackAccess == TrackAccessStreams {
 			s.touchStreams(idsNeedingTouch)
 		}
+	}()
 
 	return exists, err
 }

store/dbbacked.go

@@ -44,18 +44,18 @@ func (d *DBBackedStore) Get(hash string) (stream.Blob, error) {
 	if !has {
 		return nil, ErrBlobNotFound
 	}
-	if d.deleteOnMiss {
+
 	b, err := d.blobs.Get(hash)
+	if d.deleteOnMiss {
 		if err != nil && 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, err
 		}
 	}
 
-	return d.blobs.Get(hash)
+	return b, err
 }
 
 // Put stores the blob in the S3 store and stores the blob information in the DB.

store/litedbbacked.go

@@ -1,160 +0,0 @@
-package store
-
-import (
-	"encoding/json"
-	"time"
-
-	"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/lite_db"
-
-	"github.com/lbryio/lbry.go/v2/extras/errors"
-	"github.com/lbryio/lbry.go/v2/stream"
-
-	log "github.com/sirupsen/logrus"
-)
-
-// DBBackedStore is a store that's backed by a DB. The DB contains data about what's in the store.
-type LiteDBBackedStore struct {
-	blobs     BlobStore
-	db        *lite_db.SQL
-	maxItems  int
-	stopper   *stop.Stopper
-	component string
-}
-
-// NewDBBackedStore returns an initialized store pointer.
-func NewLiteDBBackedStore(component string, blobs BlobStore, db *lite_db.SQL, maxItems int) *LiteDBBackedStore {
-	instance := &LiteDBBackedStore{blobs: blobs, db: db, maxItems: maxItems, stopper: stop.New(), component: component}
-	go func() {
-		instance.selfClean()
-	}()
-	return instance
-}
-
-const nameLiteDBBacked = "lite-db-backed"
-
-// Name is the cache type name
-func (d *LiteDBBackedStore) Name() string { return nameDBBacked }
-
-// Has returns true if the blob is in the store
-func (d *LiteDBBackedStore) Has(hash string) (bool, error) {
-	return d.db.HasBlob(hash)
-}
-
-// Get gets the blob
-func (d *LiteDBBackedStore) Get(hash string) (stream.Blob, error) {
-	has, err := d.db.HasBlob(hash)
-	if err != nil {
-		return nil, err
-	}
-	if !has {
-		return nil, ErrBlobNotFound
-	}
-	b, err := d.blobs.Get(hash)
-	if err != nil && errors.Is(err, ErrBlobNotFound) {
-		e2 := d.db.Delete(hash)
-		if e2 != nil {
-			log.Errorf("error while deleting blob from db: %s", errors.FullTrace(e2))
-		}
-		return b, err
-	}
-
-	return d.blobs.Get(hash)
-}
-
-// Put stores the blob in the S3 store and stores the blob information in the DB.
-func (d *LiteDBBackedStore) Put(hash string, blob stream.Blob) error {
-	err := d.blobs.Put(hash, blob)
-	if err != nil {
-		return err
-	}
-
-	return d.db.AddBlob(hash, len(blob))
-}
-
-// PutSD stores the SDBlob in the S3 store. It will return an error if the sd blob is missing the stream hash or if
-// there is an error storing the blob information in the DB.
-func (d *LiteDBBackedStore) PutSD(hash string, blob stream.Blob) error {
-	var blobContents db.SdBlob
-	err := json.Unmarshal(blob, &blobContents)
-	if err != nil {
-		return errors.Err(err)
-	}
-	if blobContents.StreamHash == "" {
-		return errors.Err("sd blob is missing stream hash")
-	}
-
-	err = d.blobs.PutSD(hash, blob)
-	if err != nil {
-		return err
-	}
-
-	return d.db.AddSDBlob(hash, len(blob))
-}
-
-func (d *LiteDBBackedStore) Delete(hash string) error {
-	err := d.blobs.Delete(hash)
-	if err != nil {
-		return err
-	}
-
-	return d.db.Delete(hash)
-}
-
-// list returns the hashes of blobs that already exist in the database
-func (d *LiteDBBackedStore) list() ([]string, error) {
-	blobs, err := d.db.AllBlobs()
-	return blobs, err
-}
-
-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()
-	}
-}
-
-// Shutdown shuts down the store gracefully
-func (d *LiteDBBackedStore) Shutdown() {
-	d.stopper.StopAndWait()
-	return
-}