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splitstore_check.go
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splitstore_check.go
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package splitstore
import (
"fmt"
"os"
"path/filepath"
"sync/atomic"
"time"
"golang.org/x/xerrors"
cid "github.com/ipfs/go-cid"
bstore "github.com/filecoin-project/lotus/blockstore"
"github.com/filecoin-project/lotus/chain/types"
)
// performs an asynchronous health-check on the splitstore; results are appended to
// <splitstore-path>/check.txt
func (s *SplitStore) Check() error {
s.headChangeMx.Lock()
defer s.headChangeMx.Unlock()
// try to take compaction lock and inhibit compaction while the health-check is running
if !atomic.CompareAndSwapInt32(&s.compacting, 0, 1) {
return xerrors.Errorf("can't acquire compaction lock; compacting operation in progress")
}
if s.compactionIndex == 0 {
atomic.StoreInt32(&s.compacting, 0)
return xerrors.Errorf("splitstore hasn't compacted yet; health check is not meaningful")
}
// check if we are actually closing first
if err := s.checkClosing(); err != nil {
atomic.StoreInt32(&s.compacting, 0)
return err
}
curTs := s.chain.GetHeaviestTipSet()
go func() {
defer atomic.StoreInt32(&s.compacting, 0)
log.Info("checking splitstore health")
start := time.Now()
err := s.doCheck(curTs)
if err != nil {
log.Errorf("error checking splitstore health: %s", err)
return
}
log.Infow("health check done", "took", time.Since(start))
}()
return nil
}
func (s *SplitStore) doCheck(curTs *types.TipSet) error {
currentEpoch := curTs.Height()
boundaryEpoch := currentEpoch - CompactionBoundary
outputPath := filepath.Join(s.path, "check.txt")
output, err := os.OpenFile(outputPath, os.O_WRONLY|os.O_CREATE|os.O_APPEND, 0644)
if err != nil {
return xerrors.Errorf("error opening check output file %s: %w", outputPath, err)
}
defer output.Close() //nolint:errcheck
write := func(format string, args ...interface{}) {
_, err := fmt.Fprintf(output, format+"\n", args...)
if err != nil {
log.Warnf("error writing check output: %s", err)
}
}
ts, _ := time.Now().MarshalText()
write("---------------------------------------------")
write("start check at %s", ts)
write("current epoch: %d", currentEpoch)
write("boundary epoch: %d", boundaryEpoch)
write("compaction index: %d", s.compactionIndex)
write("--")
var coldCnt, missingCnt int64
visitor, err := s.markSetEnv.CreateVisitor("check", 0)
if err != nil {
return xerrors.Errorf("error creating visitor: %w", err)
}
defer visitor.Close() //nolint
err = s.walkChain(curTs, boundaryEpoch, boundaryEpoch, visitor,
func(c cid.Cid) error {
if isUnitaryObject(c) {
return errStopWalk
}
has, err := s.hot.Has(c)
if err != nil {
return xerrors.Errorf("error checking hotstore: %w", err)
}
if has {
return nil
}
has, err = s.cold.Has(c)
if err != nil {
return xerrors.Errorf("error checking coldstore: %w", err)
}
if has {
coldCnt++
write("cold object reference: %s", c)
} else {
missingCnt++
write("missing object reference: %s", c)
return errStopWalk
}
return nil
})
if err != nil {
err = xerrors.Errorf("error walking chain: %w", err)
write("ERROR: %s", err)
return err
}
log.Infow("check done", "cold", coldCnt, "missing", missingCnt)
write("--")
write("cold: %d missing: %d", coldCnt, missingCnt)
write("DONE")
return nil
}
// provides some basic information about the splitstore
func (s *SplitStore) Info() map[string]interface{} {
info := make(map[string]interface{})
info["base epoch"] = s.baseEpoch
info["warmup epoch"] = s.warmupEpoch
info["compactions"] = s.compactionIndex
sizer, ok := s.hot.(bstore.BlockstoreSize)
if ok {
size, err := sizer.Size()
if err != nil {
log.Warnf("error getting hotstore size: %s", err)
} else {
info["hotstore size"] = size
}
}
return info
}