mirror of
https://github.com/seaweedfs/seaweedfs.git
synced 2024-12-15 02:59:06 +08:00
369 lines
12 KiB
Go
369 lines
12 KiB
Go
package storage
|
|
|
|
import (
|
|
"fmt"
|
|
"os"
|
|
"time"
|
|
|
|
"github.com/chrislusf/seaweedfs/weed/glog"
|
|
idx2 "github.com/chrislusf/seaweedfs/weed/storage/idx"
|
|
"github.com/chrislusf/seaweedfs/weed/storage/needle"
|
|
. "github.com/chrislusf/seaweedfs/weed/storage/types"
|
|
"github.com/chrislusf/seaweedfs/weed/util"
|
|
)
|
|
|
|
func (v *Volume) garbageLevel() float64 {
|
|
if v.ContentSize() == 0 {
|
|
return 0
|
|
}
|
|
return float64(v.nm.DeletedSize()) / float64(v.ContentSize())
|
|
}
|
|
|
|
func (v *Volume) Compact(preallocate int64, compactionBytePerSecond int64) error {
|
|
glog.V(3).Infof("Compacting volume %d ...", v.Id)
|
|
//no need to lock for copy on write
|
|
//v.accessLock.Lock()
|
|
//defer v.accessLock.Unlock()
|
|
//glog.V(3).Infof("Got Compaction lock...")
|
|
|
|
filePath := v.FileName()
|
|
v.lastCompactIndexOffset = v.nm.IndexFileSize()
|
|
v.lastCompactRevision = v.SuperBlock.CompactionRevision
|
|
glog.V(3).Infof("creating copies for volume %d ,last offset %d...", v.Id, v.lastCompactIndexOffset)
|
|
return v.copyDataAndGenerateIndexFile(filePath+".cpd", filePath+".cpx", preallocate, compactionBytePerSecond)
|
|
}
|
|
|
|
func (v *Volume) Compact2() error {
|
|
glog.V(3).Infof("Compact2 volume %d ...", v.Id)
|
|
filePath := v.FileName()
|
|
glog.V(3).Infof("creating copies for volume %d ...", v.Id)
|
|
return v.copyDataBasedOnIndexFile(filePath+".cpd", filePath+".cpx")
|
|
}
|
|
|
|
func (v *Volume) CommitCompact() error {
|
|
glog.V(0).Infof("Committing volume %d vacuuming...", v.Id)
|
|
v.dataFileAccessLock.Lock()
|
|
defer v.dataFileAccessLock.Unlock()
|
|
glog.V(3).Infof("Got volume %d committing lock...", v.Id)
|
|
v.compactingWg.Add(1)
|
|
defer v.compactingWg.Done()
|
|
v.nm.Close()
|
|
if err := v.dataFile.Close(); err != nil {
|
|
glog.V(0).Infof("fail to close volume %d", v.Id)
|
|
}
|
|
v.dataFile = nil
|
|
|
|
var e error
|
|
if e = v.makeupDiff(v.FileName()+".cpd", v.FileName()+".cpx", v.FileName()+".dat", v.FileName()+".idx"); e != nil {
|
|
glog.V(0).Infof("makeupDiff in CommitCompact volume %d failed %v", v.Id, e)
|
|
e = os.Remove(v.FileName() + ".cpd")
|
|
if e != nil {
|
|
return e
|
|
}
|
|
e = os.Remove(v.FileName() + ".cpx")
|
|
if e != nil {
|
|
return e
|
|
}
|
|
} else {
|
|
var e error
|
|
if e = os.Rename(v.FileName()+".cpd", v.FileName()+".dat"); e != nil {
|
|
return fmt.Errorf("rename %s: %v", v.FileName()+".cpd", e)
|
|
}
|
|
if e = os.Rename(v.FileName()+".cpx", v.FileName()+".idx"); e != nil {
|
|
return fmt.Errorf("rename %s: %v", v.FileName()+".cpx", e)
|
|
}
|
|
}
|
|
|
|
//glog.V(3).Infof("Pretending to be vacuuming...")
|
|
//time.Sleep(20 * time.Second)
|
|
|
|
os.RemoveAll(v.FileName() + ".ldb")
|
|
os.RemoveAll(v.FileName() + ".bdb")
|
|
|
|
glog.V(3).Infof("Loading volume %d commit file...", v.Id)
|
|
if e = v.load(true, false, v.needleMapKind, 0); e != nil {
|
|
return e
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (v *Volume) cleanupCompact() error {
|
|
glog.V(0).Infof("Cleaning up volume %d vacuuming...", v.Id)
|
|
|
|
e1 := os.Remove(v.FileName() + ".cpd")
|
|
e2 := os.Remove(v.FileName() + ".cpx")
|
|
if e1 != nil {
|
|
return e1
|
|
}
|
|
if e2 != nil {
|
|
return e2
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func fetchCompactRevisionFromDatFile(file *os.File) (compactRevision uint16, err error) {
|
|
superBlock, err := ReadSuperBlock(file)
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
return superBlock.CompactionRevision, nil
|
|
}
|
|
|
|
func (v *Volume) makeupDiff(newDatFileName, newIdxFileName, oldDatFileName, oldIdxFileName string) (err error) {
|
|
var indexSize int64
|
|
|
|
oldIdxFile, err := os.Open(oldIdxFileName)
|
|
defer oldIdxFile.Close()
|
|
|
|
oldDatFile, err := os.Open(oldDatFileName)
|
|
defer oldDatFile.Close()
|
|
|
|
if indexSize, err = verifyIndexFileIntegrity(oldIdxFile); err != nil {
|
|
return fmt.Errorf("verifyIndexFileIntegrity %s failed: %v", oldIdxFileName, err)
|
|
}
|
|
if indexSize == 0 || uint64(indexSize) <= v.lastCompactIndexOffset {
|
|
return nil
|
|
}
|
|
|
|
oldDatCompactRevision, err := fetchCompactRevisionFromDatFile(oldDatFile)
|
|
if err != nil {
|
|
return fmt.Errorf("fetchCompactRevisionFromDatFile src %s failed: %v", oldDatFile.Name(), err)
|
|
}
|
|
if oldDatCompactRevision != v.lastCompactRevision {
|
|
return fmt.Errorf("current old dat file's compact revision %d is not the expected one %d", oldDatCompactRevision, v.lastCompactRevision)
|
|
}
|
|
|
|
type keyField struct {
|
|
offset Offset
|
|
size uint32
|
|
}
|
|
incrementedHasUpdatedIndexEntry := make(map[NeedleId]keyField)
|
|
|
|
for idxOffset := indexSize - NeedleMapEntrySize; uint64(idxOffset) >= v.lastCompactIndexOffset; idxOffset -= NeedleMapEntrySize {
|
|
var IdxEntry []byte
|
|
if IdxEntry, err = readIndexEntryAtOffset(oldIdxFile, idxOffset); err != nil {
|
|
return fmt.Errorf("readIndexEntry %s at offset %d failed: %v", oldIdxFileName, idxOffset, err)
|
|
}
|
|
key, offset, size := idx2.IdxFileEntry(IdxEntry)
|
|
glog.V(4).Infof("key %d offset %d size %d", key, offset, size)
|
|
if _, found := incrementedHasUpdatedIndexEntry[key]; !found {
|
|
incrementedHasUpdatedIndexEntry[key] = keyField{
|
|
offset: offset,
|
|
size: size,
|
|
}
|
|
}
|
|
}
|
|
|
|
// no updates during commit step
|
|
if len(incrementedHasUpdatedIndexEntry) == 0 {
|
|
return nil
|
|
}
|
|
|
|
// deal with updates during commit step
|
|
var (
|
|
dst, idx *os.File
|
|
)
|
|
if dst, err = os.OpenFile(newDatFileName, os.O_RDWR, 0644); err != nil {
|
|
return fmt.Errorf("open dat file %s failed: %v", newDatFileName, err)
|
|
}
|
|
defer dst.Close()
|
|
|
|
if idx, err = os.OpenFile(newIdxFileName, os.O_RDWR, 0644); err != nil {
|
|
return fmt.Errorf("open idx file %s failed: %v", newIdxFileName, err)
|
|
}
|
|
defer idx.Close()
|
|
|
|
var newDatCompactRevision uint16
|
|
newDatCompactRevision, err = fetchCompactRevisionFromDatFile(dst)
|
|
if err != nil {
|
|
return fmt.Errorf("fetchCompactRevisionFromDatFile dst %s failed: %v", dst.Name(), err)
|
|
}
|
|
if oldDatCompactRevision+1 != newDatCompactRevision {
|
|
return fmt.Errorf("oldDatFile %s 's compact revision is %d while newDatFile %s 's compact revision is %d", oldDatFileName, oldDatCompactRevision, newDatFileName, newDatCompactRevision)
|
|
}
|
|
|
|
idxEntryBytes := make([]byte, NeedleIdSize+OffsetSize+SizeSize)
|
|
for key, increIdxEntry := range incrementedHasUpdatedIndexEntry {
|
|
NeedleIdToBytes(idxEntryBytes[0:NeedleIdSize], key)
|
|
OffsetToBytes(idxEntryBytes[NeedleIdSize:NeedleIdSize+OffsetSize], increIdxEntry.offset)
|
|
util.Uint32toBytes(idxEntryBytes[NeedleIdSize+OffsetSize:NeedleIdSize+OffsetSize+SizeSize], increIdxEntry.size)
|
|
|
|
var offset int64
|
|
if offset, err = dst.Seek(0, 2); err != nil {
|
|
glog.V(0).Infof("failed to seek the end of file: %v", err)
|
|
return
|
|
}
|
|
//ensure file writing starting from aligned positions
|
|
if offset%NeedlePaddingSize != 0 {
|
|
offset = offset + (NeedlePaddingSize - offset%NeedlePaddingSize)
|
|
if offset, err = v.dataFile.Seek(offset, 0); err != nil {
|
|
glog.V(0).Infof("failed to align in datafile %s: %v", v.dataFile.Name(), err)
|
|
return
|
|
}
|
|
}
|
|
|
|
//updated needle
|
|
if !increIdxEntry.offset.IsZero() && increIdxEntry.size != 0 && increIdxEntry.size != TombstoneFileSize {
|
|
//even the needle cache in memory is hit, the need_bytes is correct
|
|
glog.V(4).Infof("file %d offset %d size %d", key, increIdxEntry.offset.ToAcutalOffset(), increIdxEntry.size)
|
|
var needleBytes []byte
|
|
needleBytes, err = needle.ReadNeedleBlob(oldDatFile, increIdxEntry.offset.ToAcutalOffset(), increIdxEntry.size, v.Version())
|
|
if err != nil {
|
|
return fmt.Errorf("ReadNeedleBlob %s key %d offset %d size %d failed: %v", oldDatFile.Name(), key, increIdxEntry.offset.ToAcutalOffset(), increIdxEntry.size, err)
|
|
}
|
|
dst.Write(needleBytes)
|
|
util.Uint32toBytes(idxEntryBytes[8:12], uint32(offset/NeedlePaddingSize))
|
|
} else { //deleted needle
|
|
//fakeDelNeedle 's default Data field is nil
|
|
fakeDelNeedle := new(needle.Needle)
|
|
fakeDelNeedle.Id = key
|
|
fakeDelNeedle.Cookie = 0x12345678
|
|
fakeDelNeedle.AppendAtNs = uint64(time.Now().UnixNano())
|
|
_, _, _, err = fakeDelNeedle.Append(dst, v.Version())
|
|
if err != nil {
|
|
return fmt.Errorf("append deleted %d failed: %v", key, err)
|
|
}
|
|
util.Uint32toBytes(idxEntryBytes[8:12], uint32(0))
|
|
}
|
|
|
|
if _, err := idx.Seek(0, 2); err != nil {
|
|
return fmt.Errorf("cannot seek end of indexfile %s: %v",
|
|
newIdxFileName, err)
|
|
}
|
|
_, err = idx.Write(idxEntryBytes)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
type VolumeFileScanner4Vacuum struct {
|
|
version needle.Version
|
|
v *Volume
|
|
dst *os.File
|
|
nm *NeedleMap
|
|
newOffset int64
|
|
now uint64
|
|
writeThrottler *util.WriteThrottler
|
|
}
|
|
|
|
func (scanner *VolumeFileScanner4Vacuum) VisitSuperBlock(superBlock SuperBlock) error {
|
|
scanner.version = superBlock.Version()
|
|
superBlock.CompactionRevision++
|
|
_, err := scanner.dst.Write(superBlock.Bytes())
|
|
scanner.newOffset = int64(superBlock.BlockSize())
|
|
return err
|
|
|
|
}
|
|
func (scanner *VolumeFileScanner4Vacuum) ReadNeedleBody() bool {
|
|
return true
|
|
}
|
|
|
|
func (scanner *VolumeFileScanner4Vacuum) VisitNeedle(n *needle.Needle, offset int64) error {
|
|
if n.HasTtl() && scanner.now >= n.LastModified+uint64(scanner.v.Ttl.Minutes()*60) {
|
|
return nil
|
|
}
|
|
nv, ok := scanner.v.nm.Get(n.Id)
|
|
glog.V(4).Infoln("needle expected offset ", offset, "ok", ok, "nv", nv)
|
|
if ok && nv.Offset.ToAcutalOffset() == offset && nv.Size > 0 && nv.Size != TombstoneFileSize {
|
|
if err := scanner.nm.Put(n.Id, ToOffset(scanner.newOffset), n.Size); err != nil {
|
|
return fmt.Errorf("cannot put needle: %s", err)
|
|
}
|
|
if _, _, _, err := n.Append(scanner.dst, scanner.v.Version()); err != nil {
|
|
return fmt.Errorf("cannot append needle: %s", err)
|
|
}
|
|
delta := n.DiskSize(scanner.version)
|
|
scanner.newOffset += delta
|
|
scanner.writeThrottler.MaybeSlowdown(delta)
|
|
glog.V(4).Infoln("saving key", n.Id, "volume offset", offset, "=>", scanner.newOffset, "data_size", n.Size)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (v *Volume) copyDataAndGenerateIndexFile(dstName, idxName string, preallocate int64, compactionBytePerSecond int64) (err error) {
|
|
var (
|
|
dst, idx *os.File
|
|
)
|
|
if dst, err = createVolumeFile(dstName, preallocate); err != nil {
|
|
return
|
|
}
|
|
defer dst.Close()
|
|
|
|
if idx, err = os.OpenFile(idxName, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644); err != nil {
|
|
return
|
|
}
|
|
defer idx.Close()
|
|
|
|
scanner := &VolumeFileScanner4Vacuum{
|
|
v: v,
|
|
now: uint64(time.Now().Unix()),
|
|
nm: NewBtreeNeedleMap(idx),
|
|
dst: dst,
|
|
writeThrottler: util.NewWriteThrottler(compactionBytePerSecond),
|
|
}
|
|
err = ScanVolumeFile(v.dir, v.Collection, v.Id, v.needleMapKind, scanner)
|
|
return
|
|
}
|
|
|
|
func (v *Volume) copyDataBasedOnIndexFile(dstName, idxName string) (err error) {
|
|
var (
|
|
dst, idx, oldIndexFile *os.File
|
|
)
|
|
if dst, err = os.OpenFile(dstName, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644); err != nil {
|
|
return
|
|
}
|
|
defer dst.Close()
|
|
|
|
if idx, err = os.OpenFile(idxName, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644); err != nil {
|
|
return
|
|
}
|
|
defer idx.Close()
|
|
|
|
if oldIndexFile, err = os.OpenFile(v.FileName()+".idx", os.O_RDONLY, 0644); err != nil {
|
|
return
|
|
}
|
|
defer oldIndexFile.Close()
|
|
|
|
nm := NewBtreeNeedleMap(idx)
|
|
now := uint64(time.Now().Unix())
|
|
|
|
v.SuperBlock.CompactionRevision++
|
|
dst.Write(v.SuperBlock.Bytes())
|
|
newOffset := int64(v.SuperBlock.BlockSize())
|
|
|
|
idx2.WalkIndexFile(oldIndexFile, func(key NeedleId, offset Offset, size uint32) error {
|
|
if offset.IsZero() || size == TombstoneFileSize {
|
|
return nil
|
|
}
|
|
|
|
nv, ok := v.nm.Get(key)
|
|
if !ok {
|
|
return nil
|
|
}
|
|
|
|
n := new(needle.Needle)
|
|
err := n.ReadData(v.dataFile, offset.ToAcutalOffset(), size, v.Version())
|
|
if err != nil {
|
|
return nil
|
|
}
|
|
|
|
if n.HasTtl() && now >= n.LastModified+uint64(v.Ttl.Minutes()*60) {
|
|
return nil
|
|
}
|
|
|
|
glog.V(4).Infoln("needle expected offset ", offset, "ok", ok, "nv", nv)
|
|
if nv.Offset == offset && nv.Size > 0 {
|
|
if err = nm.Put(n.Id, ToOffset(newOffset), n.Size); err != nil {
|
|
return fmt.Errorf("cannot put needle: %s", err)
|
|
}
|
|
if _, _, _, err = n.Append(dst, v.Version()); err != nil {
|
|
return fmt.Errorf("cannot append needle: %s", err)
|
|
}
|
|
newOffset += n.DiskSize(v.Version())
|
|
glog.V(3).Infoln("saving key", n.Id, "volume offset", offset, "=>", newOffset, "data_size", n.Size)
|
|
}
|
|
return nil
|
|
})
|
|
|
|
return
|
|
}
|