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|
package storage
import (
"fmt"
"io/ioutil"
"path"
"regexp"
"sort"
"strconv"
"github.com/chrislusf/seaweedfs/weed/storage/erasure_coding"
"github.com/chrislusf/seaweedfs/weed/storage/needle"
)
var (
re = regexp.MustCompile("\\.ec[0-9][0-9]")
)
func (l *DiskLocation) HasEcShard(vid needle.VolumeId) (erasure_coding.EcVolumeShards, bool) {
l.ecShardsLock.RLock()
defer l.ecShardsLock.RUnlock()
ecShards, ok := l.ecShards[vid]
if ok {
return ecShards, true
}
return nil, false
}
func (l *DiskLocation) FindEcShard(vid needle.VolumeId, shardId erasure_coding.ShardId) (*erasure_coding.EcVolumeShard, bool) {
l.ecShardsLock.RLock()
defer l.ecShardsLock.RUnlock()
ecShards, ok := l.ecShards[vid]
if !ok {
return nil, false
}
for _, ecShard := range ecShards {
if ecShard.ShardId == shardId {
return ecShard, true
}
}
return nil, false
}
func (l *DiskLocation) LoadEcShard(collection string, vid needle.VolumeId, shardId erasure_coding.ShardId) (err error) {
ecVolumeShard, err := erasure_coding.NewEcVolumeShard(l.Directory, collection, vid, shardId)
if err != nil {
return fmt.Errorf("failed to create ec shard %d.%d: %v", vid, shardId, err)
}
l.ecShardsLock.Lock()
l.ecShards[vid] = append(l.ecShards[vid], ecVolumeShard)
l.ecShardsLock.Unlock()
return nil
}
func (l *DiskLocation) UnloadEcShard(vid needle.VolumeId, shardId erasure_coding.ShardId) bool {
l.ecShardsLock.Lock()
defer l.ecShardsLock.Unlock()
vidShards, found := l.ecShards[vid]
if !found {
return false
}
shardIndex := -1
for i, shard := range vidShards {
if shard.ShardId == shardId {
shardIndex = i
break
}
}
if shardIndex < 0 {
return false
}
if len(vidShards) == 1 {
delete(l.ecShards, vid)
return true
}
l.ecShards[vid] = append(vidShards[:shardIndex], vidShards[shardIndex+1:]...)
return true
}
func (l *DiskLocation) loadEcShards(shards []string, collection string, vid needle.VolumeId) (err error) {
for _, shard := range shards {
shardId, err := strconv.ParseInt(path.Ext(shard)[3:], 10, 64)
if err != nil {
return fmt.Errorf("failed to parse ec shard name %v: %v", shard, err)
}
err = l.LoadEcShard(collection, vid, erasure_coding.ShardId(shardId))
if err != nil {
return fmt.Errorf("failed to load ec shard %v: %v", shard, err)
}
}
return nil
}
func (l *DiskLocation) loadAllEcShards() (err error) {
fileInfos, err := ioutil.ReadDir(l.Directory)
if err != nil {
return fmt.Errorf("load all ec shards in dir %s: %v", l.Directory, err)
}
sort.Slice(fileInfos, func(i, j int) bool {
return fileInfos[i].Name() < fileInfos[j].Name()
})
var sameVolumeShards []string
var prevVolumeId needle.VolumeId
for _, fileInfo := range fileInfos {
if fileInfo.IsDir() {
continue
}
ext := path.Ext(fileInfo.Name())
name := fileInfo.Name()
baseName := name[:len(name)-len(ext)]
collection, volumeId, err := parseCollectionVolumeId(baseName)
if err != nil {
continue
}
if re.MatchString(ext) {
if prevVolumeId == 0 || volumeId == prevVolumeId {
sameVolumeShards = append(sameVolumeShards, fileInfo.Name())
} else {
sameVolumeShards = []string{fileInfo.Name()}
}
prevVolumeId = volumeId
continue
}
if ext == ".ecx" && volumeId == prevVolumeId {
if err = l.loadEcShards(sameVolumeShards, collection, volumeId); err != nil {
return fmt.Errorf("loadEcShards collection:%v volumeId:%d : %v", collection, volumeId, err)
}
prevVolumeId = volumeId
continue
}
}
return nil
}
|
