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mvcc: do not hash consistent index

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This commit is contained in:
Xiang Li
2016-06-28 08:49:44 -07:00
committed by Gyu-Ho Lee
parent 8bbccf1047
commit 269de67bde
4 changed files with 29 additions and 14 deletions
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16
mvcc/backend/backend.go
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@ -55,7 +55,7 @@ const (
type Backend interface {
BatchTx() BatchTx
Snapshot() Snapshot
Hash() (uint32, error)
Hash(ignores map[IgnoreKey]struct{}) (uint32, error)
// Size returns the current size of the backend.
Size() int64
Defrag() error
@ -144,7 +144,12 @@ func (b *backend) Snapshot() Snapshot {
return &snapshot{tx}
}
func (b *backend) Hash() (uint32, error) {
type IgnoreKey struct {
Bucket string
Key string
}
func (b *backend) Hash(ignores map[IgnoreKey]struct{}) (uint32, error) {
h := crc32.New(crc32.MakeTable(crc32.Castagnoli))
b.mu.RLock()
@ -158,8 +163,11 @@ func (b *backend) Hash() (uint32, error) {
}
h.Write(next)
b.ForEach(func(k, v []byte) error {
h.Write(k)
h.Write(v)
bk := IgnoreKey{Bucket: string(next), Key: string(k)}
if _, ok := ignores[bk]; !ok {
h.Write(k)
h.Write(v)
}
return nil
})
}