mirror of
https://github.com/seaweedfs/seaweedfs.git
synced 2024-01-19 02:48:24 +00:00
448 lines
14 KiB
Go
448 lines
14 KiB
Go
package storage
|
|
|
|
import (
|
|
"fmt"
|
|
"os"
|
|
"runtime"
|
|
"time"
|
|
|
|
"github.com/chrislusf/seaweedfs/weed/glog"
|
|
"github.com/chrislusf/seaweedfs/weed/stats"
|
|
"github.com/chrislusf/seaweedfs/weed/storage/backend"
|
|
idx2 "github.com/chrislusf/seaweedfs/weed/storage/idx"
|
|
"github.com/chrislusf/seaweedfs/weed/storage/needle"
|
|
"github.com/chrislusf/seaweedfs/weed/storage/needle_map"
|
|
"github.com/chrislusf/seaweedfs/weed/storage/super_block"
|
|
. "github.com/chrislusf/seaweedfs/weed/storage/types"
|
|
"github.com/chrislusf/seaweedfs/weed/util"
|
|
)
|
|
|
|
func (v *Volume) garbageLevel() float64 {
|
|
if v.ContentSize() == 0 {
|
|
return 0
|
|
}
|
|
deletedSize := v.DeletedSize()
|
|
fileSize := v.ContentSize()
|
|
if v.DeletedCount() > 0 && v.DeletedSize() == 0 {
|
|
// this happens for .sdx converted back to normal .idx
|
|
// where deleted entry size is missing
|
|
datFileSize, _, _ := v.FileStat()
|
|
deletedSize = datFileSize - fileSize - super_block.SuperBlockSize
|
|
fileSize = datFileSize
|
|
}
|
|
return float64(deletedSize) / float64(fileSize)
|
|
}
|
|
|
|
// compact a volume based on deletions in .dat files
|
|
func (v *Volume) Compact(preallocate int64, compactionBytePerSecond int64) error {
|
|
|
|
if v.MemoryMapMaxSizeMb != 0 { //it makes no sense to compact in memory
|
|
return nil
|
|
}
|
|
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...")
|
|
v.isCompacting = true
|
|
defer func() {
|
|
v.isCompacting = false
|
|
}()
|
|
|
|
filePath := v.FileName()
|
|
v.lastCompactIndexOffset = v.IndexFileSize()
|
|
v.lastCompactRevision = v.SuperBlock.CompactionRevision
|
|
glog.V(3).Infof("creating copies for volume %d ,last offset %d...", v.Id, v.lastCompactIndexOffset)
|
|
if err := v.DataBackend.Sync(); err != nil {
|
|
glog.V(0).Infof("compact fail to sync volume %d", v.Id)
|
|
}
|
|
if err := v.nm.Sync(); err != nil {
|
|
glog.V(0).Infof("compact fail to sync volume idx %d", v.Id)
|
|
}
|
|
return v.copyDataAndGenerateIndexFile(filePath+".cpd", filePath+".cpx", preallocate, compactionBytePerSecond)
|
|
}
|
|
|
|
// compact a volume based on deletions in .idx files
|
|
func (v *Volume) Compact2(preallocate int64, compactionBytePerSecond int64) error {
|
|
|
|
if v.MemoryMapMaxSizeMb != 0 { //it makes no sense to compact in memory
|
|
return nil
|
|
}
|
|
glog.V(3).Infof("Compact2 volume %d ...", v.Id)
|
|
|
|
v.isCompacting = true
|
|
defer func() {
|
|
v.isCompacting = false
|
|
}()
|
|
|
|
filePath := v.FileName()
|
|
v.lastCompactIndexOffset = v.IndexFileSize()
|
|
v.lastCompactRevision = v.SuperBlock.CompactionRevision
|
|
glog.V(3).Infof("creating copies for volume %d ...", v.Id)
|
|
if err := v.DataBackend.Sync(); err != nil {
|
|
glog.V(0).Infof("compact2 fail to sync volume dat %d: %v", v.Id, err)
|
|
}
|
|
if err := v.nm.Sync(); err != nil {
|
|
glog.V(0).Infof("compact2 fail to sync volume idx %d: %v", v.Id, err)
|
|
}
|
|
return copyDataBasedOnIndexFile(filePath+".dat", filePath+".idx", filePath+".cpd", filePath+".cpx", v.SuperBlock, v.Version(), preallocate, compactionBytePerSecond)
|
|
}
|
|
|
|
func (v *Volume) CommitCompact() error {
|
|
if v.MemoryMapMaxSizeMb != 0 { //it makes no sense to compact in memory
|
|
return nil
|
|
}
|
|
glog.V(0).Infof("Committing volume %d vacuuming...", v.Id)
|
|
|
|
v.isCompacting = true
|
|
defer func() {
|
|
v.isCompacting = false
|
|
}()
|
|
|
|
v.dataFileAccessLock.Lock()
|
|
defer v.dataFileAccessLock.Unlock()
|
|
|
|
glog.V(3).Infof("Got volume %d committing lock...", v.Id)
|
|
v.nm.Close()
|
|
if v.DataBackend != nil {
|
|
if err := v.DataBackend.Close(); err != nil {
|
|
glog.V(0).Infof("fail to close volume %d", v.Id)
|
|
}
|
|
}
|
|
v.DataBackend = nil
|
|
stats.VolumeServerVolumeCounter.WithLabelValues(v.Collection, "volume").Dec()
|
|
|
|
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 {
|
|
if runtime.GOOS == "windows" {
|
|
e = os.RemoveAll(v.FileName() + ".dat")
|
|
if e != nil {
|
|
return e
|
|
}
|
|
e = os.RemoveAll(v.FileName() + ".idx")
|
|
if e != nil {
|
|
return e
|
|
}
|
|
}
|
|
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")
|
|
|
|
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(datBackend backend.BackendStorageFile) (compactRevision uint16, err error) {
|
|
superBlock, err := super_block.ReadSuperBlock(datBackend)
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
return superBlock.CompactionRevision, nil
|
|
}
|
|
|
|
// if old .dat and .idx files are updated, this func tries to apply the same changes to new files accordingly
|
|
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)
|
|
oldDatBackend := backend.NewDiskFile(oldDatFile)
|
|
defer oldDatBackend.Close()
|
|
|
|
// skip if the old .idx file has not changed
|
|
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
|
|
}
|
|
|
|
// fail if the old .dat file has changed to a new revision
|
|
oldDatCompactRevision, err := fetchCompactRevisionFromDatFile(oldDatBackend)
|
|
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 Size
|
|
}
|
|
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)
|
|
}
|
|
dstDatBackend := backend.NewDiskFile(dst)
|
|
defer dstDatBackend.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(dstDatBackend)
|
|
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)
|
|
}
|
|
|
|
for key, increIdxEntry := range incrementedHasUpdatedIndexEntry {
|
|
|
|
idxEntryBytes := needle_map.ToBytes(key, increIdxEntry.offset, 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 = dst.Seek(offset, 0); err != nil {
|
|
glog.V(0).Infof("failed to align in datafile %s: %v", dst.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(oldDatBackend, 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(dstDatBackend, 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
|
|
dstBackend backend.BackendStorageFile
|
|
nm *needle_map.MemDb
|
|
newOffset int64
|
|
now uint64
|
|
writeThrottler *util.WriteThrottler
|
|
}
|
|
|
|
func (scanner *VolumeFileScanner4Vacuum) VisitSuperBlock(superBlock super_block.SuperBlock) error {
|
|
scanner.version = superBlock.Version
|
|
superBlock.CompactionRevision++
|
|
_, err := scanner.dstBackend.WriteAt(superBlock.Bytes(), 0)
|
|
scanner.newOffset = int64(superBlock.BlockSize())
|
|
return err
|
|
|
|
}
|
|
func (scanner *VolumeFileScanner4Vacuum) ReadNeedleBody() bool {
|
|
return true
|
|
}
|
|
|
|
func (scanner *VolumeFileScanner4Vacuum) VisitNeedle(n *needle.Needle, offset int64, needleHeader, needleBody []byte) 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.Set(n.Id, ToOffset(scanner.newOffset), n.Size); err != nil {
|
|
return fmt.Errorf("cannot put needle: %s", err)
|
|
}
|
|
if _, _, _, err := n.Append(scanner.dstBackend, 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 backend.BackendStorageFile
|
|
)
|
|
if dst, err = backend.CreateVolumeFile(dstName, preallocate, 0); err != nil {
|
|
return
|
|
}
|
|
defer dst.Close()
|
|
|
|
nm := needle_map.NewMemDb()
|
|
defer nm.Close()
|
|
|
|
scanner := &VolumeFileScanner4Vacuum{
|
|
v: v,
|
|
now: uint64(time.Now().Unix()),
|
|
nm: nm,
|
|
dstBackend: dst,
|
|
writeThrottler: util.NewWriteThrottler(compactionBytePerSecond),
|
|
}
|
|
err = ScanVolumeFile(v.dir, v.Collection, v.Id, v.needleMapKind, scanner)
|
|
if err != nil {
|
|
return nil
|
|
}
|
|
|
|
err = nm.SaveToIdx(idxName)
|
|
return
|
|
}
|
|
|
|
func copyDataBasedOnIndexFile(srcDatName, srcIdxName, dstDatName, datIdxName string, sb super_block.SuperBlock, version needle.Version, preallocate int64, compactionBytePerSecond int64) (err error) {
|
|
var (
|
|
srcDatBackend, dstDatBackend backend.BackendStorageFile
|
|
dataFile *os.File
|
|
)
|
|
if dstDatBackend, err = backend.CreateVolumeFile(dstDatName, preallocate, 0); err != nil {
|
|
return
|
|
}
|
|
defer dstDatBackend.Close()
|
|
|
|
oldNm := needle_map.NewMemDb()
|
|
defer oldNm.Close()
|
|
newNm := needle_map.NewMemDb()
|
|
defer newNm.Close()
|
|
if err = oldNm.LoadFromIdx(srcIdxName); err != nil {
|
|
return
|
|
}
|
|
if dataFile, err = os.Open(srcDatName); err != nil {
|
|
return err
|
|
}
|
|
srcDatBackend = backend.NewDiskFile(dataFile)
|
|
defer srcDatBackend.Close()
|
|
|
|
now := uint64(time.Now().Unix())
|
|
|
|
sb.CompactionRevision++
|
|
dstDatBackend.WriteAt(sb.Bytes(), 0)
|
|
newOffset := int64(sb.BlockSize())
|
|
|
|
writeThrottler := util.NewWriteThrottler(compactionBytePerSecond)
|
|
|
|
oldNm.AscendingVisit(func(value needle_map.NeedleValue) error {
|
|
|
|
offset, size := value.Offset, value.Size
|
|
|
|
if offset.IsZero() || size == TombstoneFileSize {
|
|
return nil
|
|
}
|
|
|
|
n := new(needle.Needle)
|
|
err := n.ReadData(srcDatBackend, offset.ToAcutalOffset(), size, version)
|
|
if err != nil {
|
|
return nil
|
|
}
|
|
|
|
if n.HasTtl() && now >= n.LastModified+uint64(sb.Ttl.Minutes()*60) {
|
|
return nil
|
|
}
|
|
|
|
if err = newNm.Set(n.Id, ToOffset(newOffset), n.Size); err != nil {
|
|
return fmt.Errorf("cannot put needle: %s", err)
|
|
}
|
|
if _, _, _, err = n.Append(dstDatBackend, sb.Version); err != nil {
|
|
return fmt.Errorf("cannot append needle: %s", err)
|
|
}
|
|
delta := n.DiskSize(version)
|
|
newOffset += delta
|
|
writeThrottler.MaybeSlowdown(delta)
|
|
glog.V(4).Infoln("saving key", n.Id, "volume offset", offset, "=>", newOffset, "data_size", n.Size)
|
|
|
|
return nil
|
|
})
|
|
|
|
newNm.SaveToIdx(datIdxName)
|
|
|
|
return
|
|
}
|