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avoid clown shoes: only walk links for tracking in implicit writes/refs

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This commit is contained in:
vyzo 2021-07-02 15:41:10 +03:00
parent 484dfaebce
commit 9d6bcd7705
1 changed files with 22 additions and 12 deletions
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34
blockstore/splitstore/splitstore.go
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@ -150,7 +150,8 @@ type SplitStore struct {
txnProtect MarkSet
// pending write set
pendingWrites map[cid.Cid]struct{}
pendingWrites map[cid.Cid]struct{}
pendingWritesImplicit map[cid.Cid]struct{}
}
var _ bstore.Blockstore = (*SplitStore)(nil)
@ -232,11 +233,11 @@ func (s *SplitStore) Has(c cid.Cid) (bool, error) {
// treat it as an implicit Write, absence options -- the vm uses this check to avoid duplicate
// writes on Flush. When we have options in the API, the vm can explicitly signal that this is
// an implicit Write.
s.trackWrite(c)
s.trackWrite(c, true)
// also make sure the object is considered live during compaction in case we have already
// flushed pending writes and started compaction
s.trackTxnRef(c)
s.trackTxnRef(c, true)
return true, err
}
@ -252,7 +253,7 @@ func (s *SplitStore) Get(cid cid.Cid) (blocks.Block, error) {
switch err {
case nil:
s.trackTxnRef(cid)
s.trackTxnRef(cid, false)
return blk, err
case bstore.ErrNotFound:
@ -284,7 +285,7 @@ func (s *SplitStore) GetSize(cid cid.Cid) (int, error) {
switch err {
case nil:
s.trackTxnRef(cid)
s.trackTxnRef(cid, false)
return size, err
case bstore.ErrNotFound:
@ -313,8 +314,8 @@ func (s *SplitStore) Put(blk blocks.Block) error {
err := s.hot.Put(blk)
if err == nil {
s.trackWrite(blk.Cid())
s.trackTxnRef(blk.Cid())
s.trackWrite(blk.Cid(), false)
s.trackTxnRef(blk.Cid(), false)
}
return err
@ -384,7 +385,7 @@ func (s *SplitStore) View(cid cid.Cid, cb func([]byte) error) error {
err := s.hot.View(cid, cb)
switch err {
case nil:
s.trackTxnRef(cid)
s.trackTxnRef(cid, false)
return nil
case bstore.ErrNotFound:
@ -564,7 +565,7 @@ func (s *SplitStore) updateWriteEpoch() {
// Unfortunately we can't just directly tracker.Put one by one, as it is ridiculously slow with
// bbolt because of syncing (order of 10ms), so we batch them.
func (s *SplitStore) trackWrite(c cid.Cid) {
func (s *SplitStore) trackWrite(c cid.Cid, implicit bool) {
s.mx.Lock()
defer s.mx.Unlock()
@ -603,6 +604,11 @@ func (s *SplitStore) flushPendingWrites(locked bool) {
cids = append(cids, c)
seen[c] = struct{}{}
_, implicit := s.pendingWritesImplicit[c]
if !implicit {
continue
}
// recursively walk dags to propagate dependent references
if c.Prefix().Codec != cid.DagCBOR {
continue
@ -622,7 +628,11 @@ func (s *SplitStore) flushPendingWrites(locked bool) {
log.Warnf("error tracking dependent writes for cid %s: %s", c, err)
}
}
s.pendingWrites = make(map[cid.Cid]struct{})
if len(s.pendingWritesImplicit) > 0 {
s.pendingWritesImplicit = make(map[cid.Cid]struct{})
}
epoch := s.writeEpoch
err := s.tracker.PutBatch(cids, epoch)
@ -633,7 +643,7 @@ func (s *SplitStore) flushPendingWrites(locked bool) {
s.debug.LogWriteMany(s.curTs, cids, epoch)
}
func (s *SplitStore) trackTxnRef(c cid.Cid) {
func (s *SplitStore) trackTxnRef(c cid.Cid, implicit bool) {
if s.txnProtect == nil {
// not compacting
return
@ -653,7 +663,7 @@ func (s *SplitStore) trackTxnRef(c cid.Cid) {
if c.Prefix().Codec != cid.DagCBOR {
err = s.txnProtect.Mark(c)
} else {
} else if implicit {
err = s.walkLinks(c, cid.NewSet(), func(c cid.Cid) error {
return s.txnProtect.Mark(c)
})
@ -672,7 +682,7 @@ func (s *SplitStore) trackTxnRefMany(cids []cid.Cid) {
}
for _, c := range cids {
s.trackTxnRef(c)
s.trackTxnRef(c, false)
}
}