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package storage
import (
"fmt"
"os"
"github.com/syndtr/goleveldb/leveldb/opt"
"github.com/chrislusf/seaweedfs/weed/glog"
"github.com/chrislusf/seaweedfs/weed/stats"
"github.com/chrislusf/seaweedfs/weed/storage/backend"
"github.com/chrislusf/seaweedfs/weed/storage/needle"
"github.com/chrislusf/seaweedfs/weed/storage/super_block"
"github.com/chrislusf/seaweedfs/weed/util"
)
func loadVolumeWithoutIndex(dirname string, collection string, id needle.VolumeId, needleMapKind NeedleMapKind) (v *Volume, err error) {
v = &Volume{dir: dirname, Collection: collection, Id: id}
v.SuperBlock = super_block.SuperBlock{}
v.needleMapKind = needleMapKind
err = v.load(false, false, needleMapKind, 0)
return
}
func (v *Volume) load(alsoLoadIndex bool, createDatIfMissing bool, needleMapKind NeedleMapKind, preallocate int64) (err error) {
alreadyHasSuperBlock := false
hasLoadedVolume := false
defer func() {
if !hasLoadedVolume {
if v.nm != nil {
v.nm.Close()
v.nm = nil
}
if v.DataBackend != nil {
v.DataBackend.Close()
v.DataBackend = nil
}
}
}()
hasVolumeInfoFile := v.maybeLoadVolumeInfo() && v.volumeInfo.Version != 0
if v.HasRemoteFile() {
v.noWriteCanDelete = true
v.noWriteOrDelete = false
glog.V(0).Infof("loading volume %d from remote %v", v.Id, v.volumeInfo.Files)
v.LoadRemoteFile()
alreadyHasSuperBlock = true
} else if exists, canRead, canWrite, modifiedTime, fileSize := util.CheckFile(v.FileName(".dat")); exists {
// open dat file
if !canRead {
return fmt.Errorf("cannot read Volume Data file %s", v.FileName(".dat"))
}
var dataFile *os.File
if canWrite {
dataFile, err = os.OpenFile(v.FileName(".dat"), os.O_RDWR|os.O_CREATE, 0644)
} else {
glog.V(0).Infof("opening %s in READONLY mode", v.FileName(".dat"))
dataFile, err = os.Open(v.FileName(".dat"))
v.noWriteOrDelete = true
}
v.lastModifiedTsSeconds = uint64(modifiedTime.Unix())
if fileSize >= super_block.SuperBlockSize {
alreadyHasSuperBlock = true
}
v.DataBackend = backend.NewDiskFile(dataFile)
} else {
if createDatIfMissing {
v.DataBackend, err = backend.CreateVolumeFile(v.FileName(".dat"), preallocate, v.MemoryMapMaxSizeMb)
} else {
return fmt.Errorf("volume data file %s does not exist", v.FileName(".dat"))
}
}
if err != nil {
if !os.IsPermission(err) {
return fmt.Errorf("cannot load volume data %s: %v", v.FileName(".dat"), err)
} else {
return fmt.Errorf("load data file %s: %v", v.FileName(".dat"), err)
}
}
if alreadyHasSuperBlock {
err = v.readSuperBlock()
} else {
if !v.SuperBlock.Initialized() {
return fmt.Errorf("volume %s not initialized", v.FileName(".dat"))
}
err = v.maybeWriteSuperBlock()
}
if err == nil && alsoLoadIndex {
// adjust for existing volumes with .idx together with .dat files
if v.dirIdx != v.dir {
if util.FileExists(v.DataFileName() + ".idx") {
v.dirIdx = v.dir
}
}
var indexFile *os.File
if v.noWriteOrDelete {
glog.V(0).Infoln("open to read file", v.FileName(".idx"))
if indexFile, err = os.OpenFile(v.FileName(".idx"), os.O_RDONLY, 0644); err != nil {
return fmt.Errorf("cannot read Volume Index %s: %v", v.FileName(".idx"), err)
}
} else {
glog.V(1).Infoln("open to write file", v.FileName(".idx"))
if indexFile, err = os.OpenFile(v.FileName(".idx"), os.O_RDWR|os.O_CREATE, 0644); err != nil {
return fmt.Errorf("cannot write Volume Index %s: %v", v.FileName(".idx"), err)
}
}
if v.lastAppendAtNs, err = CheckAndFixVolumeDataIntegrity(v, indexFile); err != nil {
v.noWriteOrDelete = true
glog.V(0).Infof("volumeDataIntegrityChecking failed %v", err)
}
if v.noWriteOrDelete || v.noWriteCanDelete {
if v.nm, err = NewSortedFileNeedleMap(v.IndexFileName(), indexFile); err != nil {
glog.V(0).Infof("loading sorted db %s error: %v", v.FileName(".sdx"), err)
}
} else {
switch needleMapKind {
case NeedleMapInMemory:
glog.V(0).Infoln("loading index", v.FileName(".idx"), "to memory")
if v.nm, err = LoadCompactNeedleMap(indexFile); err != nil {
glog.V(0).Infof("loading index %s to memory error: %v", v.FileName(".idx"), err)
}
case NeedleMapLevelDb:
glog.V(0).Infoln("loading leveldb", v.FileName(".ldb"))
opts := &opt.Options{
BlockCacheCapacity: 2 * 1024 * 1024, // default value is 8MiB
WriteBuffer: 1 * 1024 * 1024, // default value is 4MiB
CompactionTableSizeMultiplier: 10, // default value is 1
}
if v.nm, err = NewLevelDbNeedleMap(v.FileName(".ldb"), indexFile, opts); err != nil {
glog.V(0).Infof("loading leveldb %s error: %v", v.FileName(".ldb"), err)
}
case NeedleMapLevelDbMedium:
glog.V(0).Infoln("loading leveldb medium", v.FileName(".ldb"))
opts := &opt.Options{
BlockCacheCapacity: 4 * 1024 * 1024, // default value is 8MiB
WriteBuffer: 2 * 1024 * 1024, // default value is 4MiB
CompactionTableSizeMultiplier: 10, // default value is 1
}
if v.nm, err = NewLevelDbNeedleMap(v.FileName(".ldb"), indexFile, opts); err != nil {
glog.V(0).Infof("loading leveldb %s error: %v", v.FileName(".ldb"), err)
}
case NeedleMapLevelDbLarge:
glog.V(0).Infoln("loading leveldb large", v.FileName(".ldb"))
opts := &opt.Options{
BlockCacheCapacity: 8 * 1024 * 1024, // default value is 8MiB
WriteBuffer: 4 * 1024 * 1024, // default value is 4MiB
CompactionTableSizeMultiplier: 10, // default value is 1
}
if v.nm, err = NewLevelDbNeedleMap(v.FileName(".ldb"), indexFile, opts); err != nil {
glog.V(0).Infof("loading leveldb %s error: %v", v.FileName(".ldb"), err)
}
}
}
}
if !hasVolumeInfoFile {
v.volumeInfo.Version = uint32(v.SuperBlock.Version)
v.SaveVolumeInfo()
}
stats.VolumeServerVolumeCounter.WithLabelValues(v.Collection, "volume").Inc()
if err == nil {
hasLoadedVolume = true
}
return err
}
|
