mirror of
https://github.com/seaweedfs/seaweedfs.git
synced 2024-01-19 02:48:24 +00:00
393 lines
13 KiB
Go
393 lines
13 KiB
Go
package storage
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import (
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"context"
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"fmt"
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"io"
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"os"
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"sort"
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"sync"
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"time"
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"github.com/klauspost/reedsolomon"
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"github.com/chrislusf/seaweedfs/weed/glog"
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"github.com/chrislusf/seaweedfs/weed/operation"
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"github.com/chrislusf/seaweedfs/weed/pb/master_pb"
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"github.com/chrislusf/seaweedfs/weed/pb/volume_server_pb"
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"github.com/chrislusf/seaweedfs/weed/stats"
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"github.com/chrislusf/seaweedfs/weed/storage/erasure_coding"
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"github.com/chrislusf/seaweedfs/weed/storage/needle"
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"github.com/chrislusf/seaweedfs/weed/storage/types"
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)
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func (s *Store) CollectErasureCodingHeartbeat() *master_pb.Heartbeat {
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var ecShardMessages []*master_pb.VolumeEcShardInformationMessage
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collectionEcShardSize := make(map[string]int64)
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for _, location := range s.Locations {
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location.ecVolumesLock.RLock()
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for _, ecShards := range location.ecVolumes {
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ecShardMessages = append(ecShardMessages, ecShards.ToVolumeEcShardInformationMessage()...)
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for _, ecShard := range ecShards.Shards {
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collectionEcShardSize[ecShards.Collection] += ecShard.Size()
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}
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}
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location.ecVolumesLock.RUnlock()
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}
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for col, size := range collectionEcShardSize {
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stats.VolumeServerDiskSizeGauge.WithLabelValues(col, "ec").Set(float64(size))
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}
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return &master_pb.Heartbeat{
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EcShards: ecShardMessages,
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HasNoEcShards: len(ecShardMessages) == 0,
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}
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}
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func (s *Store) MountEcShards(collection string, vid needle.VolumeId, shardId erasure_coding.ShardId) error {
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for _, location := range s.Locations {
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if err := location.LoadEcShard(collection, vid, shardId); err == nil {
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glog.V(0).Infof("MountEcShards %d.%d", vid, shardId)
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var shardBits erasure_coding.ShardBits
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s.NewEcShardsChan <- master_pb.VolumeEcShardInformationMessage{
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Id: uint32(vid),
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Collection: collection,
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EcIndexBits: uint32(shardBits.AddShardId(shardId)),
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DiskType: string(location.DiskType),
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}
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return nil
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} else if err == os.ErrNotExist {
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continue
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} else {
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return fmt.Errorf("%s load ec shard %d.%d: %v", location.Directory, vid, shardId, err)
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}
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}
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return fmt.Errorf("MountEcShards %d.%d not found on disk", vid, shardId)
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}
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func (s *Store) UnmountEcShards(vid needle.VolumeId, shardId erasure_coding.ShardId) error {
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ecShard, found := s.findEcShard(vid, shardId)
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if !found {
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return nil
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}
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var shardBits erasure_coding.ShardBits
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message := master_pb.VolumeEcShardInformationMessage{
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Id: uint32(vid),
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Collection: ecShard.Collection,
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EcIndexBits: uint32(shardBits.AddShardId(shardId)),
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DiskType: string(ecShard.DiskType),
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}
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for _, location := range s.Locations {
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if deleted := location.UnloadEcShard(vid, shardId); deleted {
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glog.V(0).Infof("UnmountEcShards %d.%d", vid, shardId)
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s.DeletedEcShardsChan <- message
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return nil
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}
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}
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return fmt.Errorf("UnmountEcShards %d.%d not found on disk", vid, shardId)
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}
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func (s *Store) findEcShard(vid needle.VolumeId, shardId erasure_coding.ShardId) (*erasure_coding.EcVolumeShard, bool) {
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for _, location := range s.Locations {
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if v, found := location.FindEcShard(vid, shardId); found {
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return v, found
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}
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}
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return nil, false
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}
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func (s *Store) FindEcVolume(vid needle.VolumeId) (*erasure_coding.EcVolume, bool) {
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for _, location := range s.Locations {
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if s, found := location.FindEcVolume(vid); found {
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return s, true
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}
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}
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return nil, false
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}
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func (s *Store) DestroyEcVolume(vid needle.VolumeId) {
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for _, location := range s.Locations {
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location.DestroyEcVolume(vid)
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}
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}
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func (s *Store) ReadEcShardNeedle(vid needle.VolumeId, n *needle.Needle) (int, error) {
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for _, location := range s.Locations {
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if localEcVolume, found := location.FindEcVolume(vid); found {
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offset, size, intervals, err := localEcVolume.LocateEcShardNeedle(n.Id, localEcVolume.Version)
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if err != nil {
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return 0, fmt.Errorf("locate in local ec volume: %v", err)
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}
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if size.IsDeleted() {
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return 0, ErrorDeleted
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}
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glog.V(3).Infof("read ec volume %d offset %d size %d intervals:%+v", vid, offset.ToActualOffset(), size, intervals)
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if len(intervals) > 1 {
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glog.V(3).Infof("ReadEcShardNeedle needle id %s intervals:%+v", n.String(), intervals)
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}
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bytes, isDeleted, err := s.readEcShardIntervals(vid, n.Id, localEcVolume, intervals)
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if err != nil {
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return 0, fmt.Errorf("ReadEcShardIntervals: %v", err)
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}
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if isDeleted {
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return 0, ErrorDeleted
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}
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err = n.ReadBytes(bytes, offset.ToActualOffset(), size, localEcVolume.Version)
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if err != nil {
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return 0, fmt.Errorf("readbytes: %v", err)
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}
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return len(bytes), nil
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}
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}
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return 0, fmt.Errorf("ec shard %d not found", vid)
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}
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func (s *Store) readEcShardIntervals(vid needle.VolumeId, needleId types.NeedleId, ecVolume *erasure_coding.EcVolume, intervals []erasure_coding.Interval) (data []byte, is_deleted bool, err error) {
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if err = s.cachedLookupEcShardLocations(ecVolume); err != nil {
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return nil, false, fmt.Errorf("failed to locate shard via master grpc %s: %v", s.MasterAddress, err)
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}
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for i, interval := range intervals {
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if d, isDeleted, e := s.readOneEcShardInterval(needleId, ecVolume, interval); e != nil {
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return nil, isDeleted, e
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} else {
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if isDeleted {
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is_deleted = true
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}
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if i == 0 {
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data = d
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} else {
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data = append(data, d...)
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}
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}
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}
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return
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}
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func (s *Store) readOneEcShardInterval(needleId types.NeedleId, ecVolume *erasure_coding.EcVolume, interval erasure_coding.Interval) (data []byte, is_deleted bool, err error) {
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shardId, actualOffset := interval.ToShardIdAndOffset(erasure_coding.ErasureCodingLargeBlockSize, erasure_coding.ErasureCodingSmallBlockSize)
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data = make([]byte, interval.Size)
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if shard, found := ecVolume.FindEcVolumeShard(shardId); found {
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if _, err = shard.ReadAt(data, actualOffset); err != nil {
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glog.V(0).Infof("read local ec shard %d.%d offset %d: %v", ecVolume.VolumeId, shardId, actualOffset, err)
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return
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}
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} else {
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ecVolume.ShardLocationsLock.RLock()
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sourceDataNodes, hasShardIdLocation := ecVolume.ShardLocations[shardId]
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ecVolume.ShardLocationsLock.RUnlock()
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// try reading directly
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if hasShardIdLocation {
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_, is_deleted, err = s.readRemoteEcShardInterval(sourceDataNodes, needleId, ecVolume.VolumeId, shardId, data, actualOffset)
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if err == nil {
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return
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}
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glog.V(0).Infof("clearing ec shard %d.%d locations: %v", ecVolume.VolumeId, shardId, err)
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forgetShardId(ecVolume, shardId)
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}
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// try reading by recovering from other shards
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_, is_deleted, err = s.recoverOneRemoteEcShardInterval(needleId, ecVolume, shardId, data, actualOffset)
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if err == nil {
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return
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}
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glog.V(0).Infof("recover ec shard %d.%d : %v", ecVolume.VolumeId, shardId, err)
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}
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return
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}
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func forgetShardId(ecVolume *erasure_coding.EcVolume, shardId erasure_coding.ShardId) {
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// failed to access the source data nodes, clear it up
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ecVolume.ShardLocationsLock.Lock()
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delete(ecVolume.ShardLocations, shardId)
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ecVolume.ShardLocationsLock.Unlock()
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}
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func (s *Store) cachedLookupEcShardLocations(ecVolume *erasure_coding.EcVolume) (err error) {
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shardCount := len(ecVolume.ShardLocations)
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if shardCount < erasure_coding.DataShardsCount &&
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ecVolume.ShardLocationsRefreshTime.Add(11*time.Second).After(time.Now()) ||
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shardCount == erasure_coding.TotalShardsCount &&
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ecVolume.ShardLocationsRefreshTime.Add(37*time.Minute).After(time.Now()) ||
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shardCount >= erasure_coding.DataShardsCount &&
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ecVolume.ShardLocationsRefreshTime.Add(7*time.Minute).After(time.Now()) {
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// still fresh
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return nil
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}
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glog.V(3).Infof("lookup and cache ec volume %d locations", ecVolume.VolumeId)
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err = operation.WithMasterServerClient(s.MasterAddress, s.grpcDialOption, func(masterClient master_pb.SeaweedClient) error {
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req := &master_pb.LookupEcVolumeRequest{
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VolumeId: uint32(ecVolume.VolumeId),
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}
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resp, err := masterClient.LookupEcVolume(context.Background(), req)
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if err != nil {
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return fmt.Errorf("lookup ec volume %d: %v", ecVolume.VolumeId, err)
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}
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if len(resp.ShardIdLocations) < erasure_coding.DataShardsCount {
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return fmt.Errorf("only %d shards found but %d required", len(resp.ShardIdLocations), erasure_coding.DataShardsCount)
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}
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ecVolume.ShardLocationsLock.Lock()
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for _, shardIdLocations := range resp.ShardIdLocations {
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shardId := erasure_coding.ShardId(shardIdLocations.ShardId)
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delete(ecVolume.ShardLocations, shardId)
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for _, loc := range shardIdLocations.Locations {
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ecVolume.ShardLocations[shardId] = append(ecVolume.ShardLocations[shardId], loc.Url)
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}
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}
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ecVolume.ShardLocationsRefreshTime = time.Now()
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ecVolume.ShardLocationsLock.Unlock()
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return nil
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})
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return
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}
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func (s *Store) readRemoteEcShardInterval(sourceDataNodes []string, needleId types.NeedleId, vid needle.VolumeId, shardId erasure_coding.ShardId, buf []byte, offset int64) (n int, is_deleted bool, err error) {
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if len(sourceDataNodes) == 0 {
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return 0, false, fmt.Errorf("failed to find ec shard %d.%d", vid, shardId)
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}
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for _, sourceDataNode := range sourceDataNodes {
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glog.V(3).Infof("read remote ec shard %d.%d from %s", vid, shardId, sourceDataNode)
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n, is_deleted, err = s.doReadRemoteEcShardInterval(sourceDataNode, needleId, vid, shardId, buf, offset)
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if err == nil {
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return
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}
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glog.V(1).Infof("read remote ec shard %d.%d from %s: %v", vid, shardId, sourceDataNode, err)
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}
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return
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}
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func (s *Store) doReadRemoteEcShardInterval(sourceDataNode string, needleId types.NeedleId, vid needle.VolumeId, shardId erasure_coding.ShardId, buf []byte, offset int64) (n int, is_deleted bool, err error) {
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err = operation.WithVolumeServerClient(sourceDataNode, s.grpcDialOption, func(client volume_server_pb.VolumeServerClient) error {
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// copy data slice
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shardReadClient, err := client.VolumeEcShardRead(context.Background(), &volume_server_pb.VolumeEcShardReadRequest{
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VolumeId: uint32(vid),
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ShardId: uint32(shardId),
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Offset: offset,
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Size: int64(len(buf)),
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FileKey: uint64(needleId),
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})
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if err != nil {
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return fmt.Errorf("failed to start reading ec shard %d.%d from %s: %v", vid, shardId, sourceDataNode, err)
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}
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for {
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resp, receiveErr := shardReadClient.Recv()
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if receiveErr == io.EOF {
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break
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}
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if receiveErr != nil {
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return fmt.Errorf("receiving ec shard %d.%d from %s: %v", vid, shardId, sourceDataNode, err)
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}
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if resp.IsDeleted {
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is_deleted = true
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}
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copy(buf[n:n+len(resp.Data)], resp.Data)
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n += len(resp.Data)
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}
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return nil
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})
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if err != nil {
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return 0, is_deleted, fmt.Errorf("read ec shard %d.%d from %s: %v", vid, shardId, sourceDataNode, err)
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}
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return
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}
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func (s *Store) recoverOneRemoteEcShardInterval(needleId types.NeedleId, ecVolume *erasure_coding.EcVolume, shardIdToRecover erasure_coding.ShardId, buf []byte, offset int64) (n int, is_deleted bool, err error) {
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glog.V(3).Infof("recover ec shard %d.%d from other locations", ecVolume.VolumeId, shardIdToRecover)
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enc, err := reedsolomon.New(erasure_coding.DataShardsCount, erasure_coding.ParityShardsCount)
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if err != nil {
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return 0, false, fmt.Errorf("failed to create encoder: %v", err)
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}
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bufs := make([][]byte, erasure_coding.TotalShardsCount)
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var wg sync.WaitGroup
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ecVolume.ShardLocationsLock.RLock()
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for shardId, locations := range ecVolume.ShardLocations {
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// skip currnent shard or empty shard
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if shardId == shardIdToRecover {
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continue
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}
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if len(locations) == 0 {
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glog.V(3).Infof("readRemoteEcShardInterval missing %d.%d from %+v", ecVolume.VolumeId, shardId, locations)
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continue
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}
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// read from remote locations
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wg.Add(1)
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go func(shardId erasure_coding.ShardId, locations []string) {
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defer wg.Done()
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data := make([]byte, len(buf))
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nRead, isDeleted, readErr := s.readRemoteEcShardInterval(locations, needleId, ecVolume.VolumeId, shardId, data, offset)
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if readErr != nil {
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glog.V(3).Infof("recover: readRemoteEcShardInterval %d.%d %d bytes from %+v: %v", ecVolume.VolumeId, shardId, nRead, locations, readErr)
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forgetShardId(ecVolume, shardId)
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}
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if isDeleted {
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is_deleted = true
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}
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if nRead == len(buf) {
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bufs[shardId] = data
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}
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}(shardId, locations)
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}
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ecVolume.ShardLocationsLock.RUnlock()
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wg.Wait()
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if err = enc.ReconstructData(bufs); err != nil {
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glog.V(3).Infof("recovered ec shard %d.%d failed: %v", ecVolume.VolumeId, shardIdToRecover, err)
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return 0, false, err
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}
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glog.V(4).Infof("recovered ec shard %d.%d from other locations", ecVolume.VolumeId, shardIdToRecover)
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copy(buf, bufs[shardIdToRecover])
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return len(buf), is_deleted, nil
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}
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func (s *Store) EcVolumes() (ecVolumes []*erasure_coding.EcVolume) {
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for _, location := range s.Locations {
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location.ecVolumesLock.RLock()
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for _, v := range location.ecVolumes {
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ecVolumes = append(ecVolumes, v)
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}
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location.ecVolumesLock.RUnlock()
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}
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sort.Slice(ecVolumes, func(i, j int) bool {
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return ecVolumes[i].VolumeId > ecVolumes[j].VolumeId
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})
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return ecVolumes
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}
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