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package storage
import ( "fmt" "os"
"github.com/syndtr/goleveldb/leveldb/opt"
"github.com/seaweedfs/seaweedfs/weed/glog" "github.com/seaweedfs/seaweedfs/weed/stats" "github.com/seaweedfs/seaweedfs/weed/storage/backend" "github.com/seaweedfs/seaweedfs/weed/storage/needle" "github.com/seaweedfs/seaweedfs/weed/storage/super_block" "github.com/seaweedfs/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()
if v.HasRemoteFile() { v.noWriteCanDelete = true v.noWriteOrDelete = false glog.V(0).Infof("loading volume %d from remote %v", v.Id, v.volumeInfo) 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() if err == nil { v.volumeInfo.Version = uint32(v.SuperBlock.Version) } glog.V(0).Infof("readSuperBlock volume %d version %v", v.Id, v.SuperBlock.Version) if v.HasRemoteFile() { // maybe temporary network problem
glog.Errorf("readSuperBlock remote volume %d: %v", v.Id, err) err = nil } } 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 } } // check volume idx files
if err := v.checkIdxFile(); err != nil { glog.Fatalf("check volume idx file %s: %v", v.FileName(".idx"), err) } 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: if v.tmpNm != nil { glog.V(0).Infof("updating memory compact index %s ", v.FileName(".idx")) err = v.tmpNm.UpdateNeedleMap(v, indexFile, nil) } else { glog.V(0).Infoln("loading memory 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: 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.tmpNm != nil { glog.V(0).Infoln("updating leveldb index", v.FileName(".ldb")) err = v.tmpNm.UpdateNeedleMap(v, indexFile, opts) } else { glog.V(0).Infoln("loading leveldb index", v.FileName(".ldb")) 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: 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.tmpNm != nil { glog.V(0).Infoln("updating leveldb medium index", v.FileName(".ldb")) err = v.tmpNm.UpdateNeedleMap(v, indexFile, opts) } else { glog.V(0).Infoln("loading leveldb medium index", v.FileName(".ldb")) 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: 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.tmpNm != nil { glog.V(0).Infoln("updating leveldb large index", v.FileName(".ldb")) err = v.tmpNm.UpdateNeedleMap(v, indexFile, opts) } else { glog.V(0).Infoln("loading leveldb large index", v.FileName(".ldb")) 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 }
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