2015-03-28 07:34:58 +08:00
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package storage
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import (
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"fmt"
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"os"
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"path/filepath"
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2020-05-23 01:54:42 +08:00
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"github.com/syndtr/goleveldb/leveldb/errors"
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2019-05-22 13:41:20 +08:00
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"github.com/syndtr/goleveldb/leveldb/opt"
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2020-05-23 01:54:42 +08:00
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"github.com/chrislusf/seaweedfs/weed/storage/idx"
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"github.com/syndtr/goleveldb/leveldb"
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2016-06-03 09:09:14 +08:00
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"github.com/chrislusf/seaweedfs/weed/glog"
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2019-04-19 12:43:36 +08:00
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"github.com/chrislusf/seaweedfs/weed/storage/needle_map"
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2018-07-08 17:28:04 +08:00
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. "github.com/chrislusf/seaweedfs/weed/storage/types"
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2016-06-03 09:09:14 +08:00
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"github.com/chrislusf/seaweedfs/weed/util"
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2015-03-28 07:34:58 +08:00
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)
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type LevelDbNeedleMap struct {
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2019-05-05 12:33:05 +08:00
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baseNeedleMapper
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2015-03-28 07:34:58 +08:00
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dbFileName string
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db *leveldb.DB
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}
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2019-04-10 00:42:06 +08:00
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func NewLevelDbNeedleMap(dbFileName string, indexFile *os.File, opts *opt.Options) (m *LevelDbNeedleMap, err error) {
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2015-05-26 15:58:41 +08:00
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m = &LevelDbNeedleMap{dbFileName: dbFileName}
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m.indexFile = indexFile
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2015-03-28 07:34:58 +08:00
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if !isLevelDbFresh(dbFileName, indexFile) {
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2018-08-23 04:59:04 +08:00
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glog.V(0).Infof("Start to Generate %s from %s", dbFileName, indexFile.Name())
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Add boltdb for volume needle map
boltdb is fairly slow to write, about 6 minutes for recreating index
for 1553934 files. Boltdb loads 1,553,934 x 16 = 24,862,944bytes from
disk, and generate the boltdb as large as 134,217,728 bytes in 6
minutes.
To compare, for leveldb, it recreates index in leveldb as large as
27,188,148 bytes in 8 seconds.
For in memory version, it loads the index in
To test the memory consumption, the leveldb or boltdb index are
created. And the server is restarted. Using the benchmark tool to read
lots of files. There are 7 volumes in benchmark collection, each with
about 1553K files.
For leveldb, the memory starts at 142,884KB, and stays at 179,340KB.
For boltdb, the memory starts at 73,756KB, and stays at 144,564KB.
For in-memory, the memory starts at 368,152KB, and stays at 448,032KB.
2015-03-30 02:04:32 +08:00
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generateLevelDbFile(dbFileName, indexFile)
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2018-08-23 04:59:04 +08:00
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glog.V(0).Infof("Finished Generating %s from %s", dbFileName, indexFile.Name())
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2015-03-28 07:34:58 +08:00
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}
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glog.V(1).Infof("Opening %s...", dbFileName)
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2019-04-10 00:42:06 +08:00
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if m.db, err = leveldb.OpenFile(dbFileName, opts); err != nil {
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2020-05-23 01:54:42 +08:00
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if errors.IsCorrupted(err) {
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m.db, err = leveldb.RecoverFile(dbFileName, opts)
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}
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2020-05-26 15:03:44 +08:00
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if err != nil {
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return
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}
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2015-03-28 07:34:58 +08:00
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}
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glog.V(1).Infof("Loading %s...", indexFile.Name())
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2018-07-07 15:51:17 +08:00
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mm, indexLoadError := newNeedleMapMetricFromIndexFile(indexFile)
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2015-03-28 07:34:58 +08:00
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if indexLoadError != nil {
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return nil, indexLoadError
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}
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2018-07-07 15:51:17 +08:00
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m.mapMetric = *mm
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2015-03-28 07:34:58 +08:00
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return
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}
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func isLevelDbFresh(dbFileName string, indexFile *os.File) bool {
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// normally we always write to index file first
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dbLogFile, err := os.Open(filepath.Join(dbFileName, "LOG"))
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if err != nil {
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return false
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}
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defer dbLogFile.Close()
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dbStat, dbStatErr := dbLogFile.Stat()
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indexStat, indexStatErr := indexFile.Stat()
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if dbStatErr != nil || indexStatErr != nil {
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glog.V(0).Infof("Can not stat file: %v and %v", dbStatErr, indexStatErr)
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return false
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}
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return dbStat.ModTime().After(indexStat.ModTime())
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}
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Add boltdb for volume needle map
boltdb is fairly slow to write, about 6 minutes for recreating index
for 1553934 files. Boltdb loads 1,553,934 x 16 = 24,862,944bytes from
disk, and generate the boltdb as large as 134,217,728 bytes in 6
minutes.
To compare, for leveldb, it recreates index in leveldb as large as
27,188,148 bytes in 8 seconds.
For in memory version, it loads the index in
To test the memory consumption, the leveldb or boltdb index are
created. And the server is restarted. Using the benchmark tool to read
lots of files. There are 7 volumes in benchmark collection, each with
about 1553K files.
For leveldb, the memory starts at 142,884KB, and stays at 179,340KB.
For boltdb, the memory starts at 73,756KB, and stays at 144,564KB.
For in-memory, the memory starts at 368,152KB, and stays at 448,032KB.
2015-03-30 02:04:32 +08:00
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func generateLevelDbFile(dbFileName string, indexFile *os.File) error {
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2015-03-28 07:34:58 +08:00
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db, err := leveldb.OpenFile(dbFileName, nil)
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if err != nil {
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return err
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}
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defer db.Close()
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2019-05-22 13:41:20 +08:00
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return idx.WalkIndexFile(indexFile, func(key NeedleId, offset Offset, size uint32) error {
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2019-04-09 10:40:56 +08:00
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if !offset.IsZero() && size != TombstoneFileSize {
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2015-03-28 07:34:58 +08:00
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levelDbWrite(db, key, offset, size)
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} else {
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levelDbDelete(db, key)
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}
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return nil
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})
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}
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2019-04-19 12:43:36 +08:00
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func (m *LevelDbNeedleMap) Get(key NeedleId) (element *needle_map.NeedleValue, ok bool) {
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2018-07-08 17:28:04 +08:00
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bytes := make([]byte, NeedleIdSize)
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NeedleIdToBytes(bytes[0:NeedleIdSize], key)
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2015-03-28 07:34:58 +08:00
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data, err := m.db.Get(bytes, nil)
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2018-07-08 17:28:04 +08:00
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if err != nil || len(data) != OffsetSize+SizeSize {
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2015-03-28 07:34:58 +08:00
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return nil, false
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}
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2018-07-08 17:28:04 +08:00
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offset := BytesToOffset(data[0:OffsetSize])
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2018-07-22 08:39:10 +08:00
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size := util.BytesToUint32(data[OffsetSize : OffsetSize+SizeSize])
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2019-06-21 16:14:10 +08:00
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return &needle_map.NeedleValue{Key: key, Offset: offset, Size: size}, true
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2015-03-28 07:34:58 +08:00
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}
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2018-07-08 17:28:04 +08:00
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func (m *LevelDbNeedleMap) Put(key NeedleId, offset Offset, size uint32) error {
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2015-03-28 07:34:58 +08:00
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var oldSize uint32
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if oldNeedle, ok := m.Get(key); ok {
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oldSize = oldNeedle.Size
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}
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m.logPut(key, oldSize, size)
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// write to index file first
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2015-05-26 15:58:41 +08:00
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if err := m.appendToIndexFile(key, offset, size); err != nil {
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2015-03-28 07:34:58 +08:00
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return fmt.Errorf("cannot write to indexfile %s: %v", m.indexFile.Name(), err)
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}
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return levelDbWrite(m.db, key, offset, size)
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}
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2019-07-22 04:50:24 +08:00
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func levelDbWrite(db *leveldb.DB, key NeedleId, offset Offset, size uint32) error {
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2018-07-08 17:28:04 +08:00
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2019-07-22 04:50:24 +08:00
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bytes := needle_map.ToBytes(key, offset, size)
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2018-07-08 17:28:04 +08:00
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if err := db.Put(bytes[0:NeedleIdSize], bytes[NeedleIdSize:NeedleIdSize+OffsetSize+SizeSize], nil); err != nil {
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2015-03-28 07:34:58 +08:00
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return fmt.Errorf("failed to write leveldb: %v", err)
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}
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return nil
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}
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2018-07-08 17:28:04 +08:00
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func levelDbDelete(db *leveldb.DB, key NeedleId) error {
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bytes := make([]byte, NeedleIdSize)
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NeedleIdToBytes(bytes, key)
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2015-03-28 07:34:58 +08:00
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return db.Delete(bytes, nil)
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}
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2018-07-08 17:28:04 +08:00
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func (m *LevelDbNeedleMap) Delete(key NeedleId, offset Offset) error {
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2015-03-28 07:34:58 +08:00
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if oldNeedle, ok := m.Get(key); ok {
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m.logDelete(oldNeedle.Size)
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}
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// write to index file first
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2017-01-07 02:22:20 +08:00
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if err := m.appendToIndexFile(key, offset, TombstoneFileSize); err != nil {
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2015-03-28 07:34:58 +08:00
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return err
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}
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return levelDbDelete(m.db, key)
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}
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func (m *LevelDbNeedleMap) Close() {
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2020-02-05 02:37:14 +08:00
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indexFileName := m.indexFile.Name()
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if err := m.indexFile.Sync(); err != nil {
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glog.Warningf("sync file %s failed: %v", indexFileName, err)
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}
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if err := m.indexFile.Close(); err != nil {
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glog.Warningf("close index file %s failed: %v", indexFileName, err)
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}
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if err := m.db.Close(); err != nil {
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glog.Warningf("close levelDB failed: %v", err)
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}
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2015-03-28 07:34:58 +08:00
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}
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func (m *LevelDbNeedleMap) Destroy() error {
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m.Close()
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os.Remove(m.indexFile.Name())
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2017-08-30 22:55:03 +08:00
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return os.RemoveAll(m.dbFileName)
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2015-03-28 07:34:58 +08:00
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}
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