remove gc from storage, but implement it in memory
This commit is contained in:
parent
d3f153c938
commit
6fddcb8eea
4 changed files with 95 additions and 79 deletions
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@ -22,10 +22,11 @@ import (
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type ConfigFile struct {
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MainConfigBlock struct {
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middleware.Config
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PrometheusAddr string `yaml:"prometheus_addr"`
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HTTPConfig httpfrontend.Config `yaml:"http"`
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UDPConfig udpfrontend.Config `yaml:"udp"`
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middleware.Config
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Storage memory.Config `yaml:"storage"`
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} `yaml:"trakr"`
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}
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@ -95,15 +96,18 @@ func main() {
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}
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}()
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// TODO create PeerStore
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// TODO create Hooks
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logic := middleware.NewLogic(cfg.Config, nil, nil, nil, nil, nil)
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// Force the compiler to enforce memory against the storage interface.
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peerStore, err := memory.New(cfg.Storage)
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if err != nil {
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return err
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}
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// Force the compiler to enforce memory against the storage interface.
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_, _ = memory.New(memory.Config{1})
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// TODO create PeerStore
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// TODO create Hooks
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logic := middleware.NewLogic(cfg.Config, peerStore, nil, nil, nil, nil)
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if err != nil {
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return err
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}
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errChan := make(chan error)
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closedChan := make(chan struct{})
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@ -18,8 +18,8 @@ trakr:
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name: memory
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config:
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shards: 1
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gc_interval: 15m
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gc_expiration: 15m
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gc_interval: 14m
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peer_lifetime: 15m
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prehooks:
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- name: jwt
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@ -16,27 +16,41 @@ import (
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// Config holds the configuration of a memory PeerStore.
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type Config struct {
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ShardCount int `yaml:"shard_count"`
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GarbageCollectionInterval time.Duration `yaml:"gc_interval"`
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PeerLifetime time.Duration `yaml:"peer_lifetime"`
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ShardCount int `yaml:"shard_count"`
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}
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// New creates a new memory PeerStore.
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//
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// The PeerStore will have at least one shard.
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// New creates a new PeerStore backed by memory.
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func New(cfg Config) (storage.PeerStore, error) {
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shardCount := 1
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if cfg.ShardCount > 0 {
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shardCount = cfg.ShardCount
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}
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shards := make([]*peerShard, shardCount*2)
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for i := 0; i < shardCount*2; i++ {
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shards[i] = &peerShard{swarms: make(map[bittorrent.InfoHash]swarm)}
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ps := &peerStore{
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shards: make([]*peerShard, shardCount*2),
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closed: make(chan struct{}),
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}
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return &peerStore{
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shards: shards,
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closed: make(chan struct{}),
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}, nil
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for i := 0; i < shardCount*2; i++ {
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ps.shards[i] = &peerShard{swarms: make(map[bittorrent.InfoHash]swarm)}
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}
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go func() {
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for {
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select {
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case <-ps.closed:
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return
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case <-time.After(cfg.GarbageCollectionInterval):
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before := time.Now().Add(-cfg.GarbageCollectionInterval)
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log.Println("memory: purging peers with no announces since ", before)
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ps.collectGarbage(before)
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}
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}
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}()
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return ps, nil
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}
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type serializedPeer string
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@ -225,59 +239,6 @@ func (s *peerStore) GraduateLeecher(ih bittorrent.InfoHash, p bittorrent.Peer) e
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return nil
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}
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func (s *peerStore) CollectGarbage(cutoff time.Time) error {
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select {
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case <-s.closed:
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panic("attempted to interact with stopped memory store")
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default:
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}
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log.Printf("memory: collecting garbage. Cutoff time: %s", cutoff.String())
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cutoffUnix := cutoff.UnixNano()
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for _, shard := range s.shards {
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shard.RLock()
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var infohashes []bittorrent.InfoHash
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for ih := range shard.swarms {
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infohashes = append(infohashes, ih)
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}
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shard.RUnlock()
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runtime.Gosched()
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for _, ih := range infohashes {
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shard.Lock()
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if _, stillExists := shard.swarms[ih]; !stillExists {
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shard.Unlock()
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runtime.Gosched()
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continue
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}
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for pk, mtime := range shard.swarms[ih].leechers {
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if mtime <= cutoffUnix {
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delete(shard.swarms[ih].leechers, pk)
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}
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}
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for pk, mtime := range shard.swarms[ih].seeders {
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if mtime <= cutoffUnix {
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delete(shard.swarms[ih].seeders, pk)
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}
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}
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if len(shard.swarms[ih].seeders)|len(shard.swarms[ih].leechers) == 0 {
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delete(shard.swarms, ih)
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}
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shard.Unlock()
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runtime.Gosched()
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}
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runtime.Gosched()
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}
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return nil
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}
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func (s *peerStore) AnnouncePeers(ih bittorrent.InfoHash, seeder bool, numWant int, announcer bittorrent.Peer) (peers []bittorrent.Peer, err error) {
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select {
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case <-s.closed:
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@ -340,6 +301,64 @@ func (s *peerStore) AnnouncePeers(ih bittorrent.InfoHash, seeder bool, numWant i
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return
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}
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// collectGarbage deletes all Peers from the PeerStore which are older than the
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// cutoff time.
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//
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// This function must be able to execute while other methods on this interface
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// are being executed in parallel.
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func (s *peerStore) collectGarbage(cutoff time.Time) error {
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select {
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case <-s.closed:
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panic("attempted to interact with stopped memory store")
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default:
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}
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log.Printf("memory: collecting garbage. Cutoff time: %s", cutoff.String())
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cutoffUnix := cutoff.UnixNano()
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for _, shard := range s.shards {
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shard.RLock()
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var infohashes []bittorrent.InfoHash
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for ih := range shard.swarms {
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infohashes = append(infohashes, ih)
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}
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shard.RUnlock()
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runtime.Gosched()
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for _, ih := range infohashes {
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shard.Lock()
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if _, stillExists := shard.swarms[ih]; !stillExists {
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shard.Unlock()
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runtime.Gosched()
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continue
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}
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for pk, mtime := range shard.swarms[ih].leechers {
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if mtime <= cutoffUnix {
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delete(shard.swarms[ih].leechers, pk)
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}
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}
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for pk, mtime := range shard.swarms[ih].seeders {
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if mtime <= cutoffUnix {
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delete(shard.swarms[ih].seeders, pk)
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}
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}
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if len(shard.swarms[ih].seeders)|len(shard.swarms[ih].leechers) == 0 {
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delete(shard.swarms, ih)
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}
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shard.Unlock()
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runtime.Gosched()
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}
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runtime.Gosched()
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}
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return nil
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}
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func (s *peerStore) Stop() <-chan error {
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toReturn := make(chan error)
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go func() {
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@ -1,8 +1,6 @@
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package storage
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import (
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"time"
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"github.com/jzelinskie/trakr/bittorrent"
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"github.com/jzelinskie/trakr/stopper"
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)
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@ -53,11 +51,6 @@ type PeerStore interface {
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// - if seeder is false, should ideally return more seeders than leechers
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AnnouncePeers(infoHash bittorrent.InfoHash, seeder bool, numWant int, p bittorrent.Peer) (peers []bittorrent.Peer, err error)
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// CollectGarbage deletes all Peers from the PeerStore which are older than
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// the cutoff time. This function must be able to execute while other methods
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// on this interface are being executed in parallel.
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CollectGarbage(cutoff time.Time) error
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// Stopper is an interface that expects a Stop method to stops the PeerStore.
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// For more details see the documentation in the stopper package.
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stopper.Stopper
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