151 lines
3.5 KiB
Go
151 lines
3.5 KiB
Go
package splitstore
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import (
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"sync"
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"sync/atomic"
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"time"
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blocks "github.com/ipfs/go-block-format"
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"github.com/ipfs/go-cid"
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ipld "github.com/ipfs/go-ipld-format"
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"golang.org/x/xerrors"
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"github.com/filecoin-project/go-state-types/abi"
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"github.com/filecoin-project/lotus/build"
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"github.com/filecoin-project/lotus/chain/types"
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)
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var (
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// WarmupBoundary is the number of epochs to load state during warmup.
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WarmupBoundary = build.Finality
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)
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// warmup acuiqres the compaction lock and spawns a goroutine to warm up the hotstore;
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// this is necessary when we sync from a snapshot or when we enable the splitstore
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// on top of an existing blockstore (which becomes the coldstore).
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func (s *SplitStore) warmup(curTs *types.TipSet) error {
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if !atomic.CompareAndSwapInt32(&s.compacting, 0, 1) {
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return xerrors.Errorf("error locking compaction")
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}
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go func() {
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defer atomic.StoreInt32(&s.compacting, 0)
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log.Info("warming up hotstore")
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start := time.Now()
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err := s.doWarmup(curTs)
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if err != nil {
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log.Errorf("error warming up hotstore: %s", err)
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return
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}
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log.Infow("warm up done", "took", time.Since(start))
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}()
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return nil
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}
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// the actual warmup procedure; it walks the chain loading all state roots at the boundary
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// and headers all the way up to genesis.
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// objects are written in batches so as to minimize overhead.
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func (s *SplitStore) doWarmup(curTs *types.TipSet) error {
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var boundaryEpoch abi.ChainEpoch
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epoch := curTs.Height()
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if WarmupBoundary < epoch {
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boundaryEpoch = epoch - WarmupBoundary
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}
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var mx sync.Mutex
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batchHot := make([]blocks.Block, 0, batchSize)
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count := new(int64)
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xcount := new(int64)
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missing := new(int64)
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visitor, err := s.markSetEnv.New("warmup", 0)
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if err != nil {
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return xerrors.Errorf("error creating visitor: %w", err)
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}
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defer visitor.Close() //nolint
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err = s.walkChain(curTs, boundaryEpoch, epoch+1, // we don't load messages/receipts in warmup
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visitor,
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func(c cid.Cid) error {
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if isUnitaryObject(c) {
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return errStopWalk
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}
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atomic.AddInt64(count, 1)
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has, err := s.hot.Has(s.ctx, c)
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if err != nil {
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return err
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}
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if has {
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return nil
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}
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blk, err := s.cold.Get(s.ctx, c)
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if err != nil {
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if ipld.IsNotFound(err) {
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atomic.AddInt64(missing, 1)
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return errStopWalk
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}
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return err
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}
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atomic.AddInt64(xcount, 1)
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mx.Lock()
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batchHot = append(batchHot, blk)
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if len(batchHot) == batchSize {
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err = s.hot.PutMany(s.ctx, batchHot)
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if err != nil {
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mx.Unlock()
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return err
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}
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batchHot = batchHot[:0]
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}
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mx.Unlock()
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return nil
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})
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if err != nil {
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return err
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}
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if len(batchHot) > 0 {
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err = s.hot.PutMany(s.ctx, batchHot)
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if err != nil {
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return err
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}
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}
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log.Infow("warmup stats", "visited", *count, "warm", *xcount, "missing", *missing)
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s.markSetSize = *count + *count>>2 // overestimate a bit
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err = s.ds.Put(s.ctx, markSetSizeKey, int64ToBytes(s.markSetSize))
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if err != nil {
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log.Warnf("error saving mark set size: %s", err)
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}
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// save the warmup epoch
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err = s.ds.Put(s.ctx, warmupEpochKey, epochToBytes(epoch))
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if err != nil {
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return xerrors.Errorf("error saving warm up epoch: %w", err)
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}
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s.mx.Lock()
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s.warmupEpoch = epoch
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s.mx.Unlock()
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// also save the compactionIndex, as this is used as an indicator of warmup for upgraded nodes
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err = s.ds.Put(s.ctx, compactionIndexKey, int64ToBytes(s.compactionIndex))
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if err != nil {
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return xerrors.Errorf("error saving compaction index: %w", err)
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}
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return nil
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}
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