storj/satellite/gc/piecetracker.go
Michał Niewrzał 456aea727e satellite: use PieceIDDeriver for derivation
We can use PieceIDDeriver in all places where we are deriving id from
the same id multiple times. We have serveral such places: gc, segment
deletion, segment validation, order limit creation. Using it should
save some resources.

Change-Id: I24668d516c0f7cea4aec6470614067734149501d
2022-05-19 06:31:42 +00:00

93 lines
2.8 KiB
Go

// Copyright (C) 2019 Storj Labs, Inc.
// See LICENSE for copying information.
package gc
import (
"context"
"time"
"github.com/zeebo/errs"
"go.uber.org/zap"
"storj.io/common/bloomfilter"
"storj.io/common/memory"
"storj.io/common/storj"
"storj.io/storj/satellite/metabase/segmentloop"
)
var _ segmentloop.Observer = (*PieceTracker)(nil)
// PieceTracker implements the metainfo loop observer interface for garbage collection.
//
// architecture: Observer
type PieceTracker struct {
log *zap.Logger
config Config
creationDate time.Time
// TODO: should we use int or int64 consistently for piece count (db type is int64)?
pieceCounts map[storj.NodeID]int
RetainInfos map[storj.NodeID]*RetainInfo
}
// NewPieceTracker instantiates a new gc piece tracker to be subscribed to the metainfo loop.
func NewPieceTracker(log *zap.Logger, config Config, pieceCounts map[storj.NodeID]int) *PieceTracker {
return &PieceTracker{
log: log,
config: config,
creationDate: time.Now().UTC(),
pieceCounts: pieceCounts,
RetainInfos: make(map[storj.NodeID]*RetainInfo, len(pieceCounts)),
}
}
// LoopStarted is called at each start of a loop.
func (pieceTracker *PieceTracker) LoopStarted(ctx context.Context, info segmentloop.LoopInfo) (err error) {
if pieceTracker.creationDate.After(info.Started) {
return errs.New("Creation date after loop starting time.")
}
return nil
}
// RemoteSegment takes a remote segment found in metabase and adds pieces to bloom filters.
func (pieceTracker *PieceTracker) RemoteSegment(ctx context.Context, segment *segmentloop.Segment) (err error) {
defer mon.Task()(&ctx)(&err)
deriver := segment.RootPieceID.Deriver()
for _, piece := range segment.Pieces {
pieceID := deriver.Derive(piece.StorageNode, int32(piece.Number))
pieceTracker.add(piece.StorageNode, pieceID)
}
return nil
}
// InlineSegment returns nil because we're only doing gc for storage nodes for now.
func (pieceTracker *PieceTracker) InlineSegment(ctx context.Context, segment *segmentloop.Segment) (err error) {
return nil
}
// adds a pieceID to the relevant node's RetainInfo.
func (pieceTracker *PieceTracker) add(nodeID storj.NodeID, pieceID storj.PieceID) {
info, ok := pieceTracker.RetainInfos[nodeID]
if !ok {
// If we know how many pieces a node should be storing, use that number. Otherwise use default.
numPieces := pieceTracker.config.InitialPieces
if pieceTracker.pieceCounts[nodeID] > 0 {
numPieces = pieceTracker.pieceCounts[nodeID]
}
// limit size of bloom filter to ensure we are under the limit for RPC
filter := bloomfilter.NewOptimalMaxSize(numPieces, pieceTracker.config.FalsePositiveRate, 2*memory.MiB)
info = &RetainInfo{
Filter: filter,
CreationDate: pieceTracker.creationDate,
}
pieceTracker.RetainInfos[nodeID] = info
}
info.Filter.Add(pieceID)
info.Count++
}