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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,215 @@ | ||
| package db | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "path/filepath" | ||
|
|
||
| "github.com/cockroachdb/pebble" | ||
| ) | ||
|
|
||
| func init() { | ||
| dbCreator := func(name string, dir string) (DB, error) { | ||
| return NewPebbleDB(name, dir) | ||
| } | ||
| registerDBCreator(PebbleDBBackend, dbCreator, false) | ||
| } | ||
|
|
||
| // PebbleDB is a PebbleDB backend. | ||
| type PebbleDB struct { | ||
| db *pebble.DB | ||
| } | ||
|
|
||
| var _ DB = (*PebbleDB)(nil) | ||
|
|
||
| func NewPebbleDB(name string, dir string) (DB, error) { | ||
| dbPath := filepath.Join(dir, name+".db") | ||
| // cache := pebble.NewCache(1024 * 1024 * 32) | ||
| // defer cache.Unref() | ||
| opts := &pebble.Options{ | ||
| // Cache: cache, | ||
| // FormatMajorVersion: pebble.FormatNewest, | ||
| // L0CompactionThreshold: 2, | ||
| // L0StopWritesThreshold: 1000, | ||
| // LBaseMaxBytes: 64 << 20, // 64 MB | ||
| // Levels: make([]pebble.LevelOptions, 7), | ||
| // MaxConcurrentCompactions: 3, | ||
| // MaxOpenFiles: 1024, | ||
| // MemTableSize: 64 << 20, | ||
| // MemTableStopWritesThreshold: 4, | ||
| } | ||
| /* | ||
| for i := 0; i < len(opts.Levels); i++ { | ||
| l := &opts.Levels[i] | ||
| l.BlockSize = 32 << 10 // 32 KB | ||
| l.IndexBlockSize = 256 << 10 // 256 KB | ||
| l.FilterPolicy = bloom.FilterPolicy(10) | ||
| l.FilterType = pebble.TableFilter | ||
| if i > 0 { | ||
| l.TargetFileSize = opts.Levels[i-1].TargetFileSize * 2 | ||
| } | ||
| l.EnsureDefaults() | ||
| } | ||
| */ | ||
| // opts.Levels[6].FilterPolicy = nil | ||
| // opts.FlushSplitBytes = opts.Levels[0].TargetFileSize | ||
|
|
||
| opts.EnsureDefaults() | ||
|
|
||
| p, err := pebble.Open(dbPath, opts) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return &PebbleDB{ | ||
| db: p, | ||
| }, err | ||
| } | ||
|
|
||
| // Get implements DB. | ||
| func (db *PebbleDB) Get(key []byte) ([]byte, error) { | ||
| if len(key) == 0 { | ||
| return nil, errKeyEmpty | ||
| } | ||
| res, closer, err := db.db.Get(key) | ||
| if err != nil { | ||
| return res, nil | ||
| } | ||
| closer.Close() | ||
| return res, nil | ||
| } | ||
|
|
||
| // Has implements DB. | ||
| func (db *PebbleDB) Has(key []byte) (bool, error) { | ||
| if len(key) == 0 { | ||
| return false, errKeyEmpty | ||
| } | ||
| bytes, err := db.Get(key) | ||
| if err != nil { | ||
| return false, err | ||
| } | ||
| return bytes != nil, nil | ||
| } | ||
|
|
||
| // Set implements DB. | ||
| func (db *PebbleDB) Set(key []byte, value []byte) error { | ||
| if len(key) == 0 { | ||
| return errKeyEmpty | ||
| } | ||
| if value == nil { | ||
| return errValueNil | ||
| } | ||
| err := db.db.Set(key, value, pebble.NoSync) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| // SetSync implements DB. | ||
| func (db *PebbleDB) SetSync(key []byte, value []byte) error { | ||
| if len(key) == 0 { | ||
| return errKeyEmpty | ||
| } | ||
| if value == nil { | ||
| return errValueNil | ||
| } | ||
| err := db.db.Set(key, value, pebble.Sync) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| // Delete implements DB. | ||
| func (db *PebbleDB) Delete(key []byte) error { | ||
| if len(key) == 0 { | ||
| return errKeyEmpty | ||
| } | ||
| err := db.db.Delete(key, pebble.NoSync) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| // DeleteSync implements DB. | ||
| func (db PebbleDB) DeleteSync(key []byte) error { | ||
| if len(key) == 0 { | ||
| return errKeyEmpty | ||
| } | ||
| err := db.db.Delete(key, pebble.Sync) | ||
| if err != nil { | ||
| return nil | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| func (db *PebbleDB) DB() *pebble.DB { | ||
| return db.db | ||
| } | ||
|
|
||
| // Close implements DB. | ||
| func (db PebbleDB) Close() error { | ||
| db.db.Close() | ||
| return nil | ||
| } | ||
|
|
||
| // Print implements DB. | ||
| func (db *PebbleDB) Print() error { | ||
| itr, err := db.Iterator(nil, nil) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| defer itr.Close() | ||
| for ; itr.Valid(); itr.Next() { | ||
| key := itr.Key() | ||
| value := itr.Value() | ||
| fmt.Printf("[%X]:\t[%X]\n", key, value) | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| // Stats implements DB. | ||
| func (db *PebbleDB) Stats() map[string]string { | ||
| /* | ||
| keys := []string{"rocksdb.stats"} | ||
| stats := make(map[string]string, len(keys)) | ||
| for _, key := range keys { | ||
| stats[key] = db.(key) | ||
| } | ||
| */ | ||
| return nil | ||
| } | ||
|
|
||
| // NewBatch implements DB. | ||
| func (db *PebbleDB) NewBatch() Batch { | ||
| return newPebbleDBBatch(db) | ||
| } | ||
|
|
||
| // Iterator implements DB. | ||
| func (db *PebbleDB) Iterator(start, end []byte) (Iterator, error) { | ||
| if (start != nil && len(start) == 0) || (end != nil && len(end) == 0) { | ||
| return nil, errKeyEmpty | ||
| } | ||
| o := pebble.IterOptions{ | ||
| LowerBound: start, | ||
| UpperBound: end, | ||
| } | ||
| itr := db.db.NewIter(&o) | ||
| itr.First() | ||
|
|
||
| return newPebbleDBIterator(itr, start, end, false), nil | ||
| } | ||
|
|
||
| // ReverseIterator implements DB. | ||
| func (db *PebbleDB) ReverseIterator(start, end []byte) (Iterator, error) { | ||
| if (start != nil && len(start) == 0) || (end != nil && len(end) == 0) { | ||
| return nil, errKeyEmpty | ||
| } | ||
| o := pebble.IterOptions{ | ||
| LowerBound: start, | ||
| UpperBound: end, | ||
| } | ||
| itr := db.db.NewIter(&o) | ||
| itr.Last() | ||
| return newPebbleDBIterator(itr, start, end, true), nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,83 @@ | ||
| package db | ||
|
|
||
| import "github.com/cockroachdb/pebble" | ||
|
|
||
| type pebbleDBBatch struct { | ||
| db *PebbleDB | ||
| batch *pebble.Batch | ||
| } | ||
|
|
||
| var _ Batch = (*pebbleDBBatch)(nil) | ||
|
|
||
| func newPebbleDBBatch(db *PebbleDB) *pebbleDBBatch { | ||
| return &pebbleDBBatch{ | ||
| batch: db.db.NewBatch(), | ||
| } | ||
| } | ||
|
|
||
| // Set implements Batch. | ||
| func (b *pebbleDBBatch) Set(key, value []byte) error { | ||
| if len(key) == 0 { | ||
| return errKeyEmpty | ||
| } | ||
| if value == nil { | ||
| return errValueNil | ||
| } | ||
| if b.batch == nil { | ||
| return errBatchClosed | ||
| } | ||
| b.batch.Set(key, value, nil) | ||
| return nil | ||
| } | ||
|
|
||
| // Delete implements Batch. | ||
| func (b *pebbleDBBatch) Delete(key []byte) error { | ||
| if len(key) == 0 { | ||
| return errKeyEmpty | ||
| } | ||
| if b.batch == nil { | ||
| return errBatchClosed | ||
| } | ||
| b.batch.Delete(key, nil) | ||
| return nil | ||
| } | ||
|
|
||
| // Write implements Batch. | ||
| func (b *pebbleDBBatch) Write() error { | ||
| if b.batch == nil { | ||
| return errBatchClosed | ||
| } | ||
| err := b.batch.Commit(pebble.NoSync) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| // Make sure batch cannot be used afterwards. Callers should still call Close(), for errors. | ||
|
|
||
| return b.Close() | ||
| } | ||
|
|
||
| // WriteSync implements Batch. | ||
| func (b *pebbleDBBatch) WriteSync() error { | ||
| if b.batch == nil { | ||
| return errBatchClosed | ||
| } | ||
| err := b.batch.Commit(pebble.Sync) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| // Make sure batch cannot be used afterwards. Callers should still call Close(), for errors. | ||
| return b.Close() | ||
| } | ||
|
|
||
| // Close implements Batch. | ||
| func (b *pebbleDBBatch) Close() error { | ||
| if b.batch != nil { | ||
| err := b.batch.Close() | ||
| if err != nil { | ||
| return err | ||
| } | ||
| b.batch = nil | ||
| } | ||
|
|
||
| return nil | ||
| } |
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