86 lines
2.7 KiB
Go
86 lines
2.7 KiB
Go
// Copyright (C) 2019 Storj Labs, Inc.
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// See LICENSE for copying information.
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package gc
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import (
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"context"
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"time"
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"go.uber.org/zap"
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"storj.io/common/bloomfilter"
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"storj.io/common/memory"
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"storj.io/common/storj"
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"storj.io/storj/satellite/metainfo"
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)
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var _ metainfo.Observer = (*PieceTracker)(nil)
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// PieceTracker implements the metainfo loop observer interface for garbage collection.
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//
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// architecture: Observer
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type PieceTracker struct {
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log *zap.Logger
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config Config
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creationDate time.Time
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// TODO: should we use int or int64 consistently for piece count (db type is int64)?
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pieceCounts map[storj.NodeID]int
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RetainInfos map[storj.NodeID]*RetainInfo
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}
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// NewPieceTracker instantiates a new gc piece tracker to be subscribed to the metainfo loop.
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func NewPieceTracker(log *zap.Logger, config Config, pieceCounts map[storj.NodeID]int) *PieceTracker {
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return &PieceTracker{
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log: log,
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config: config,
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creationDate: time.Now().UTC(),
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pieceCounts: pieceCounts,
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RetainInfos: make(map[storj.NodeID]*RetainInfo, len(pieceCounts)),
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}
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}
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// RemoteSegment takes a remote segment found in metainfo and adds pieces to bloom filters.
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func (pieceTracker *PieceTracker) RemoteSegment(ctx context.Context, segment *metainfo.Segment) (err error) {
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defer mon.Task()(&ctx)(&err)
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for _, piece := range segment.Pieces {
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pieceID := segment.RootPieceID.Derive(piece.StorageNode, int32(piece.Number))
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pieceTracker.add(piece.StorageNode, pieceID)
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}
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return nil
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}
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// Object returns nil because gc does not interact with remote objects.
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func (pieceTracker *PieceTracker) Object(ctx context.Context, object *metainfo.Object) (err error) {
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return nil
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}
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// InlineSegment returns nil because we're only doing gc for storage nodes for now.
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func (pieceTracker *PieceTracker) InlineSegment(ctx context.Context, segment *metainfo.Segment) (err error) {
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return nil
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}
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// adds a pieceID to the relevant node's RetainInfo.
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func (pieceTracker *PieceTracker) add(nodeID storj.NodeID, pieceID storj.PieceID) {
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if _, ok := pieceTracker.RetainInfos[nodeID]; !ok {
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// If we know how many pieces a node should be storing, use that number. Otherwise use default.
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numPieces := pieceTracker.config.InitialPieces
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if pieceTracker.pieceCounts[nodeID] > 0 {
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numPieces = pieceTracker.pieceCounts[nodeID]
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}
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// limit size of bloom filter to ensure we are under the limit for RPC
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filter := bloomfilter.NewOptimalMaxSize(numPieces, pieceTracker.config.FalsePositiveRate, 2*memory.MiB)
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pieceTracker.RetainInfos[nodeID] = &RetainInfo{
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Filter: filter,
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CreationDate: pieceTracker.creationDate,
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}
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}
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pieceTracker.RetainInfos[nodeID].Filter.Add(pieceID)
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pieceTracker.RetainInfos[nodeID].Count++
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}
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