mirror of
https://github.com/seaweedfs/seaweedfs.git
synced 2024-11-24 19:19:11 +08:00
328 lines
9.1 KiB
Go
328 lines
9.1 KiB
Go
package storage
|
|
|
|
import (
|
|
"fmt"
|
|
"os"
|
|
"path/filepath"
|
|
|
|
"github.com/syndtr/goleveldb/leveldb/errors"
|
|
"github.com/syndtr/goleveldb/leveldb/opt"
|
|
|
|
"github.com/seaweedfs/seaweedfs/weed/storage/idx"
|
|
"github.com/seaweedfs/seaweedfs/weed/storage/types"
|
|
"github.com/seaweedfs/seaweedfs/weed/util"
|
|
|
|
"github.com/syndtr/goleveldb/leveldb"
|
|
|
|
"github.com/seaweedfs/seaweedfs/weed/glog"
|
|
"github.com/seaweedfs/seaweedfs/weed/storage/needle_map"
|
|
. "github.com/seaweedfs/seaweedfs/weed/storage/types"
|
|
)
|
|
|
|
// mark it every watermarkBatchSize operations
|
|
const watermarkBatchSize = 10000
|
|
|
|
var watermarkKey = []byte("idx_entry_watermark")
|
|
|
|
type LevelDbNeedleMap struct {
|
|
baseNeedleMapper
|
|
dbFileName string
|
|
db *leveldb.DB
|
|
recordCount uint64
|
|
}
|
|
|
|
func NewLevelDbNeedleMap(dbFileName string, indexFile *os.File, opts *opt.Options) (m *LevelDbNeedleMap, err error) {
|
|
m = &LevelDbNeedleMap{dbFileName: dbFileName}
|
|
m.indexFile = indexFile
|
|
if !isLevelDbFresh(dbFileName, indexFile) {
|
|
glog.V(1).Infof("Start to Generate %s from %s", dbFileName, indexFile.Name())
|
|
generateLevelDbFile(dbFileName, indexFile)
|
|
glog.V(1).Infof("Finished Generating %s from %s", dbFileName, indexFile.Name())
|
|
}
|
|
if stat, err := indexFile.Stat(); err != nil {
|
|
glog.Fatalf("stat file %s: %v", indexFile.Name(), err)
|
|
} else {
|
|
m.indexFileOffset = stat.Size()
|
|
}
|
|
glog.V(1).Infof("Opening %s...", dbFileName)
|
|
|
|
if m.db, err = leveldb.OpenFile(dbFileName, opts); err != nil {
|
|
if errors.IsCorrupted(err) {
|
|
m.db, err = leveldb.RecoverFile(dbFileName, opts)
|
|
}
|
|
if err != nil {
|
|
return
|
|
}
|
|
}
|
|
glog.V(0).Infof("Loading %s... , watermark: %d", dbFileName, getWatermark(m.db))
|
|
m.recordCount = uint64(m.indexFileOffset / types.NeedleMapEntrySize)
|
|
watermark := (m.recordCount / watermarkBatchSize) * watermarkBatchSize
|
|
err = setWatermark(m.db, watermark)
|
|
if err != nil {
|
|
glog.Fatalf("set watermark for %s error: %s\n", dbFileName, err)
|
|
return
|
|
}
|
|
mm, indexLoadError := newNeedleMapMetricFromIndexFile(indexFile)
|
|
if indexLoadError != nil {
|
|
return nil, indexLoadError
|
|
}
|
|
m.mapMetric = *mm
|
|
return
|
|
}
|
|
|
|
func isLevelDbFresh(dbFileName string, indexFile *os.File) bool {
|
|
// normally we always write to index file first
|
|
dbLogFile, err := os.Open(filepath.Join(dbFileName, "LOG"))
|
|
if err != nil {
|
|
return false
|
|
}
|
|
defer dbLogFile.Close()
|
|
dbStat, dbStatErr := dbLogFile.Stat()
|
|
indexStat, indexStatErr := indexFile.Stat()
|
|
if dbStatErr != nil || indexStatErr != nil {
|
|
glog.V(0).Infof("Can not stat file: %v and %v", dbStatErr, indexStatErr)
|
|
return false
|
|
}
|
|
|
|
return dbStat.ModTime().After(indexStat.ModTime())
|
|
}
|
|
|
|
func generateLevelDbFile(dbFileName string, indexFile *os.File) error {
|
|
db, err := leveldb.OpenFile(dbFileName, nil)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer db.Close()
|
|
|
|
watermark := getWatermark(db)
|
|
if stat, err := indexFile.Stat(); err != nil {
|
|
glog.Fatalf("stat file %s: %v", indexFile.Name(), err)
|
|
return err
|
|
} else {
|
|
if watermark*types.NeedleMapEntrySize > uint64(stat.Size()) {
|
|
glog.Warningf("wrong watermark %d for filesize %d", watermark, stat.Size())
|
|
}
|
|
glog.V(0).Infof("generateLevelDbFile %s, watermark %d, num of entries:%d", dbFileName, watermark, (uint64(stat.Size())-watermark*types.NeedleMapEntrySize)/types.NeedleMapEntrySize)
|
|
}
|
|
return idx.WalkIndexFile(indexFile, watermark, func(key NeedleId, offset Offset, size Size) error {
|
|
if !offset.IsZero() && size.IsValid() {
|
|
levelDbWrite(db, key, offset, size, false, 0)
|
|
} else {
|
|
levelDbDelete(db, key)
|
|
}
|
|
return nil
|
|
})
|
|
}
|
|
|
|
func (m *LevelDbNeedleMap) Get(key NeedleId) (element *needle_map.NeedleValue, ok bool) {
|
|
bytes := make([]byte, NeedleIdSize)
|
|
NeedleIdToBytes(bytes[0:NeedleIdSize], key)
|
|
data, err := m.db.Get(bytes, nil)
|
|
if err != nil || len(data) != OffsetSize+SizeSize {
|
|
return nil, false
|
|
}
|
|
offset := BytesToOffset(data[0:OffsetSize])
|
|
size := BytesToSize(data[OffsetSize : OffsetSize+SizeSize])
|
|
return &needle_map.NeedleValue{Key: key, Offset: offset, Size: size}, true
|
|
}
|
|
|
|
func (m *LevelDbNeedleMap) Put(key NeedleId, offset Offset, size Size) error {
|
|
var oldSize Size
|
|
var watermark uint64
|
|
if oldNeedle, ok := m.Get(key); ok {
|
|
oldSize = oldNeedle.Size
|
|
}
|
|
m.logPut(key, oldSize, size)
|
|
// write to index file first
|
|
if err := m.appendToIndexFile(key, offset, size); err != nil {
|
|
return fmt.Errorf("cannot write to indexfile %s: %v", m.indexFile.Name(), err)
|
|
}
|
|
m.recordCount++
|
|
if m.recordCount%watermarkBatchSize != 0 {
|
|
watermark = 0
|
|
} else {
|
|
watermark = (m.recordCount / watermarkBatchSize) * watermarkBatchSize
|
|
glog.V(1).Infof("put cnt:%d for %s,watermark: %d", m.recordCount, m.dbFileName, watermark)
|
|
}
|
|
return levelDbWrite(m.db, key, offset, size, watermark == 0, watermark)
|
|
}
|
|
|
|
func getWatermark(db *leveldb.DB) uint64 {
|
|
data, err := db.Get(watermarkKey, nil)
|
|
if err != nil || len(data) != 8 {
|
|
glog.V(1).Infof("read previous watermark from db: %v, %d", err, len(data))
|
|
return 0
|
|
}
|
|
return util.BytesToUint64(data)
|
|
}
|
|
|
|
func setWatermark(db *leveldb.DB, watermark uint64) error {
|
|
glog.V(3).Infof("set watermark %d", watermark)
|
|
var wmBytes = make([]byte, 8)
|
|
util.Uint64toBytes(wmBytes, watermark)
|
|
if err := db.Put(watermarkKey, wmBytes, nil); err != nil {
|
|
return fmt.Errorf("failed to setWatermark: %v", err)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func levelDbWrite(db *leveldb.DB, key NeedleId, offset Offset, size Size, updateWatermark bool, watermark uint64) error {
|
|
|
|
bytes := needle_map.ToBytes(key, offset, size)
|
|
|
|
if err := db.Put(bytes[0:NeedleIdSize], bytes[NeedleIdSize:NeedleIdSize+OffsetSize+SizeSize], nil); err != nil {
|
|
return fmt.Errorf("failed to write leveldb: %v", err)
|
|
}
|
|
// set watermark
|
|
if updateWatermark {
|
|
return setWatermark(db, watermark)
|
|
}
|
|
return nil
|
|
}
|
|
func levelDbDelete(db *leveldb.DB, key NeedleId) error {
|
|
bytes := make([]byte, NeedleIdSize)
|
|
NeedleIdToBytes(bytes, key)
|
|
return db.Delete(bytes, nil)
|
|
}
|
|
|
|
func (m *LevelDbNeedleMap) Delete(key NeedleId, offset Offset) error {
|
|
var watermark uint64
|
|
oldNeedle, found := m.Get(key)
|
|
if !found || oldNeedle.Size.IsDeleted() {
|
|
return nil
|
|
}
|
|
m.logDelete(oldNeedle.Size)
|
|
|
|
// write to index file first
|
|
if err := m.appendToIndexFile(key, offset, TombstoneFileSize); err != nil {
|
|
return err
|
|
}
|
|
m.recordCount++
|
|
if m.recordCount%watermarkBatchSize != 0 {
|
|
watermark = 0
|
|
} else {
|
|
watermark = (m.recordCount / watermarkBatchSize) * watermarkBatchSize
|
|
}
|
|
return levelDbWrite(m.db, key, oldNeedle.Offset, -oldNeedle.Size, watermark == 0, watermark)
|
|
}
|
|
|
|
func (m *LevelDbNeedleMap) Close() {
|
|
if m.indexFile != nil {
|
|
indexFileName := m.indexFile.Name()
|
|
if err := m.indexFile.Sync(); err != nil {
|
|
glog.Warningf("sync file %s failed: %v", indexFileName, err)
|
|
}
|
|
if err := m.indexFile.Close(); err != nil {
|
|
glog.Warningf("close index file %s failed: %v", indexFileName, err)
|
|
}
|
|
}
|
|
|
|
if m.db != nil {
|
|
if err := m.db.Close(); err != nil {
|
|
glog.Warningf("close levelDB failed: %v", err)
|
|
}
|
|
}
|
|
}
|
|
|
|
func (m *LevelDbNeedleMap) Destroy() error {
|
|
m.Close()
|
|
os.Remove(m.indexFile.Name())
|
|
return os.RemoveAll(m.dbFileName)
|
|
}
|
|
|
|
func (m *LevelDbNeedleMap) UpdateNeedleMap(v *Volume, indexFile *os.File, opts *opt.Options) error {
|
|
if v.nm != nil {
|
|
v.nm.Close()
|
|
v.nm = nil
|
|
}
|
|
defer func() {
|
|
if v.tmpNm != nil {
|
|
v.tmpNm.Close()
|
|
v.tmpNm = nil
|
|
}
|
|
}()
|
|
levelDbFile := v.FileName(".ldb")
|
|
m.indexFile = indexFile
|
|
err := os.RemoveAll(levelDbFile)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if err = os.Rename(v.FileName(".cpldb"), levelDbFile); err != nil {
|
|
return fmt.Errorf("rename %s: %v", levelDbFile, err)
|
|
}
|
|
|
|
db, err := leveldb.OpenFile(levelDbFile, opts)
|
|
if err != nil {
|
|
if errors.IsCorrupted(err) {
|
|
db, err = leveldb.RecoverFile(levelDbFile, opts)
|
|
}
|
|
if err != nil {
|
|
return err
|
|
}
|
|
}
|
|
m.db = db
|
|
|
|
stat, e := indexFile.Stat()
|
|
if e != nil {
|
|
glog.Fatalf("stat file %s: %v", indexFile.Name(), e)
|
|
return e
|
|
}
|
|
m.indexFileOffset = stat.Size()
|
|
m.recordCount = uint64(stat.Size() / types.NeedleMapEntrySize)
|
|
|
|
//set watermark
|
|
watermark := (m.recordCount / watermarkBatchSize) * watermarkBatchSize
|
|
err = setWatermark(db, uint64(watermark))
|
|
if err != nil {
|
|
glog.Fatalf("setting watermark failed %s: %v", indexFile.Name(), err)
|
|
return err
|
|
}
|
|
v.nm = m
|
|
v.tmpNm = nil
|
|
return e
|
|
}
|
|
|
|
func (m *LevelDbNeedleMap) DoOffsetLoading(v *Volume, indexFile *os.File, startFrom uint64) (err error) {
|
|
glog.V(0).Infof("loading idx to leveldb from offset %d for file: %s", startFrom, indexFile.Name())
|
|
dbFileName := v.FileName(".cpldb")
|
|
db, dbErr := leveldb.OpenFile(dbFileName, nil)
|
|
defer func() {
|
|
if dbErr == nil {
|
|
db.Close()
|
|
}
|
|
if err != nil {
|
|
os.RemoveAll(dbFileName)
|
|
}
|
|
|
|
}()
|
|
if dbErr != nil {
|
|
if errors.IsCorrupted(err) {
|
|
db, dbErr = leveldb.RecoverFile(dbFileName, nil)
|
|
}
|
|
if dbErr != nil {
|
|
return dbErr
|
|
}
|
|
}
|
|
|
|
err = idx.WalkIndexFile(indexFile, startFrom, func(key NeedleId, offset Offset, size Size) (e error) {
|
|
if !offset.IsZero() && size.IsValid() {
|
|
e = levelDbWrite(db, key, offset, size, false, 0)
|
|
} else {
|
|
e = levelDbDelete(db, key)
|
|
}
|
|
return e
|
|
})
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if startFrom != 0 {
|
|
return needleMapMetricFromIndexFile(indexFile, &m.mapMetric)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (m *LevelDbNeedleMap) UpdateNeedleMapMetric(indexFile *os.File) error {
|
|
return needleMapMetricFromIndexFile(indexFile, &m.mapMetric)
|
|
}
|