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224 lines
7.9 KiB
224 lines
7.9 KiB
package storage
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import (
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"fmt"
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"os"
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"github.com/seaweedfs/seaweedfs/weed/storage/types"
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"github.com/syndtr/goleveldb/leveldb/opt"
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"github.com/seaweedfs/seaweedfs/weed/glog"
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"github.com/seaweedfs/seaweedfs/weed/stats"
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"github.com/seaweedfs/seaweedfs/weed/storage/backend"
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"github.com/seaweedfs/seaweedfs/weed/storage/needle"
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"github.com/seaweedfs/seaweedfs/weed/storage/super_block"
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"github.com/seaweedfs/seaweedfs/weed/util"
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)
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func loadVolumeWithoutIndex(dirname string, collection string, id needle.VolumeId, needleMapKind NeedleMapKind) (v *Volume, err error) {
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v = &Volume{dir: dirname, Collection: collection, Id: id}
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v.SuperBlock = super_block.SuperBlock{}
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v.needleMapKind = needleMapKind
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err = v.load(false, false, needleMapKind, 0)
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return
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}
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func (v *Volume) load(alsoLoadIndex bool, createDatIfMissing bool, needleMapKind NeedleMapKind, preallocate int64) (err error) {
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alreadyHasSuperBlock := false
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hasLoadedVolume := false
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defer func() {
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if !hasLoadedVolume {
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if v.nm != nil {
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v.nm.Close()
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v.nm = nil
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}
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if v.DataBackend != nil {
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v.DataBackend.Close()
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v.DataBackend = nil
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}
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}
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}()
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hasVolumeInfoFile := v.maybeLoadVolumeInfo()
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if v.volumeInfo.ReadOnly && !v.HasRemoteFile() {
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// this covers the case where the volume is marked as read-only and has no remote file
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v.noWriteOrDelete = true
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}
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if v.HasRemoteFile() {
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v.noWriteCanDelete = true
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v.noWriteOrDelete = false
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glog.V(0).Infof("loading volume %d from remote %v", v.Id, v.volumeInfo)
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v.LoadRemoteFile()
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alreadyHasSuperBlock = true
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} else if exists, canRead, canWrite, modifiedTime, fileSize := util.CheckFile(v.FileName(".dat")); exists {
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// open dat file
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if !canRead {
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return fmt.Errorf("cannot read Volume Data file %s", v.FileName(".dat"))
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}
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var dataFile *os.File
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if canWrite {
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dataFile, err = os.OpenFile(v.FileName(".dat"), os.O_RDWR|os.O_CREATE, 0644)
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} else {
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glog.V(0).Infof("opening %s in READONLY mode", v.FileName(".dat"))
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dataFile, err = os.Open(v.FileName(".dat"))
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v.noWriteOrDelete = true
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}
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v.lastModifiedTsSeconds = uint64(modifiedTime.Unix())
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if fileSize >= super_block.SuperBlockSize {
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alreadyHasSuperBlock = true
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}
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v.DataBackend = backend.NewDiskFile(dataFile)
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} else {
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if createDatIfMissing {
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v.DataBackend, err = backend.CreateVolumeFile(v.FileName(".dat"), preallocate, v.MemoryMapMaxSizeMb)
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} else {
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return fmt.Errorf("volume data file %s does not exist", v.FileName(".dat"))
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}
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}
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if err != nil {
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if !os.IsPermission(err) {
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return fmt.Errorf("cannot load volume data %s: %v", v.FileName(".dat"), err)
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} else {
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return fmt.Errorf("load data file %s: %v", v.FileName(".dat"), err)
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}
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}
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if alreadyHasSuperBlock {
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err = v.readSuperBlock()
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if err == nil {
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v.volumeInfo.Version = uint32(v.SuperBlock.Version)
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}
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glog.V(0).Infof("readSuperBlock volume %d version %v", v.Id, v.SuperBlock.Version)
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if v.HasRemoteFile() {
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// maybe temporary network problem
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glog.Errorf("readSuperBlock remote volume %d: %v", v.Id, err)
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err = nil
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}
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} else {
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if !v.SuperBlock.Initialized() {
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return fmt.Errorf("volume %s not initialized", v.FileName(".dat"))
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}
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err = v.maybeWriteSuperBlock()
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}
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if err == nil && alsoLoadIndex {
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// adjust for existing volumes with .idx together with .dat files
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if v.dirIdx != v.dir {
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if util.FileExists(v.DataFileName() + ".idx") {
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v.dirIdx = v.dir
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}
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}
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// check volume idx files
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if err := v.checkIdxFile(); err != nil {
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glog.Fatalf("check volume idx file %s: %v", v.FileName(".idx"), err)
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}
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var indexFile *os.File
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if v.noWriteOrDelete {
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glog.V(0).Infoln("open to read file", v.FileName(".idx"))
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if indexFile, err = os.OpenFile(v.FileName(".idx"), os.O_RDONLY, 0644); err != nil {
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return fmt.Errorf("cannot read Volume Index %s: %v", v.FileName(".idx"), err)
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}
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} else {
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glog.V(1).Infoln("open to write file", v.FileName(".idx"))
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if indexFile, err = os.OpenFile(v.FileName(".idx"), os.O_RDWR|os.O_CREATE, 0644); err != nil {
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return fmt.Errorf("cannot write Volume Index %s: %v", v.FileName(".idx"), err)
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}
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}
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// Do not need to check the data integrity for remote volumes,
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// since the remote storage tier may have larger capacity, the volume
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// data read will trigger the ReadAt() function to read from the remote
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// storage tier, and download to local storage, which may cause the
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// capactiy overloading.
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if !v.HasRemoteFile() {
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glog.V(0).Infof("checking volume data integrity for volume %d", v.Id)
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if v.lastAppendAtNs, err = CheckAndFixVolumeDataIntegrity(v, indexFile); err != nil {
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v.noWriteOrDelete = true
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glog.V(0).Infof("volumeDataIntegrityChecking failed %v", err)
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}
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}
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if v.noWriteOrDelete || v.noWriteCanDelete {
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if v.nm, err = NewSortedFileNeedleMap(v.IndexFileName(), indexFile); err != nil {
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glog.V(0).Infof("loading sorted db %s error: %v", v.FileName(".sdx"), err)
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}
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} else {
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switch needleMapKind {
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case NeedleMapInMemory:
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if v.tmpNm != nil {
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glog.V(0).Infof("updating memory compact index %s ", v.FileName(".idx"))
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err = v.tmpNm.UpdateNeedleMap(v, indexFile, nil, 0)
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} else {
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glog.V(0).Infoln("loading memory index", v.FileName(".idx"), "to memory")
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if v.nm, err = LoadCompactNeedleMap(indexFile); err != nil {
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glog.V(0).Infof("loading index %s to memory error: %v", v.FileName(".idx"), err)
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}
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}
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case NeedleMapLevelDb:
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opts := &opt.Options{
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BlockCacheCapacity: 2 * 1024 * 1024, // default value is 8MiB
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WriteBuffer: 1 * 1024 * 1024, // default value is 4MiB
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CompactionTableSizeMultiplier: 10, // default value is 1
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}
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if v.tmpNm != nil {
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glog.V(0).Infoln("updating leveldb index", v.FileName(".ldb"))
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err = v.tmpNm.UpdateNeedleMap(v, indexFile, opts, v.ldbTimeout)
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} else {
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glog.V(0).Infoln("loading leveldb index", v.FileName(".ldb"))
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if v.nm, err = NewLevelDbNeedleMap(v.FileName(".ldb"), indexFile, opts, v.ldbTimeout); err != nil {
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glog.V(0).Infof("loading leveldb %s error: %v", v.FileName(".ldb"), err)
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}
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}
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case NeedleMapLevelDbMedium:
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opts := &opt.Options{
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BlockCacheCapacity: 4 * 1024 * 1024, // default value is 8MiB
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WriteBuffer: 2 * 1024 * 1024, // default value is 4MiB
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CompactionTableSizeMultiplier: 10, // default value is 1
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}
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if v.tmpNm != nil {
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glog.V(0).Infoln("updating leveldb medium index", v.FileName(".ldb"))
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err = v.tmpNm.UpdateNeedleMap(v, indexFile, opts, v.ldbTimeout)
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} else {
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glog.V(0).Infoln("loading leveldb medium index", v.FileName(".ldb"))
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if v.nm, err = NewLevelDbNeedleMap(v.FileName(".ldb"), indexFile, opts, v.ldbTimeout); err != nil {
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glog.V(0).Infof("loading leveldb %s error: %v", v.FileName(".ldb"), err)
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}
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}
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case NeedleMapLevelDbLarge:
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opts := &opt.Options{
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BlockCacheCapacity: 8 * 1024 * 1024, // default value is 8MiB
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WriteBuffer: 4 * 1024 * 1024, // default value is 4MiB
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CompactionTableSizeMultiplier: 10, // default value is 1
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}
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if v.tmpNm != nil {
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glog.V(0).Infoln("updating leveldb large index", v.FileName(".ldb"))
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err = v.tmpNm.UpdateNeedleMap(v, indexFile, opts, v.ldbTimeout)
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} else {
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glog.V(0).Infoln("loading leveldb large index", v.FileName(".ldb"))
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if v.nm, err = NewLevelDbNeedleMap(v.FileName(".ldb"), indexFile, opts, v.ldbTimeout); err != nil {
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glog.V(0).Infof("loading leveldb %s error: %v", v.FileName(".ldb"), err)
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}
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}
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}
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}
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}
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if !hasVolumeInfoFile {
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v.volumeInfo.Version = uint32(v.SuperBlock.Version)
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v.volumeInfo.BytesOffset = uint32(types.OffsetSize)
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if err := v.SaveVolumeInfo(); err != nil {
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glog.Warningf("volume %d failed to save file info: %v", v.Id, err)
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}
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}
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stats.VolumeServerVolumeGauge.WithLabelValues(v.Collection, "volume").Inc()
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if err == nil {
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hasLoadedVolume = true
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}
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return err
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}
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