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add tool to change replication or ttl

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fix https://github.com/chrislusf/seaweedfs/issues/386
This commit is contained in:
Chris Lu 2016-11-04 20:42:28 -07:00
parent 05eda424fc
commit df49692dff
1 changed files with 31 additions and 12 deletions
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43
unmaintained/change_replication/change_replication.go → unmaintained/change_superblock/change_superblock.go
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@ -16,6 +16,7 @@ var (
fixVolumeCollection = flag.String("collection", "", "the volume collection name")
fixVolumeId = flag.Int("volumeId", -1, "a volume id. The volume should already exist in the dir. The volume index file should not exist.")
targetReplica = flag.String("replication", "", "If just empty, only print out current replication setting.")
targetTTL = flag.String("ttl", "", "If just empty, only print out current ttl setting.")
)
/*
@ -58,27 +59,45 @@ func main() {
}
fmt.Printf("Current Volume Replication: %s\n", superBlock.ReplicaPlacement)
fmt.Printf("Current Volume TTL: %s\n", superBlock.Ttl.String())
if *targetReplica == "" {
return
hasChange := false
if *targetReplica != "" {
replica, err := storage.NewReplicaPlacementFromString(*targetReplica)
if err != nil {
glog.Fatalf("cannot parse target replica %s: %v", *targetReplica, err)
}
fmt.Printf("Changing replication to: %s\n", replica)
superBlock.ReplicaPlacement = replica
hasChange = true
}
replica, err := storage.NewReplicaPlacementFromString(*targetReplica)
if *targetTTL != "" {
ttl, err := storage.ReadTTL(*targetTTL)
if err != nil {
glog.Fatalf("cannot parse target replica %s: %v", *targetReplica, err)
if err != nil {
glog.Fatalf("cannot parse target ttl %s: %v", *targetTTL, err)
}
fmt.Printf("Changing ttl to: %s\n", ttl)
superBlock.Ttl = ttl
hasChange = true
}
fmt.Printf("Changing to: %s\n", replica)
if hasChange {
superBlock.ReplicaPlacement = replica
header = superBlock.Bytes()
header = superBlock.Bytes()
if n, e := datFile.WriteAt(header, 0); n == 0 || e != nil {
glog.Fatalf("cannot write super block: %v", e)
}
if n, e := datFile.WriteAt(header, 0); n == 0 || e != nil {
glog.Fatalf("cannot write super block: %v", e)
fmt.Println("Change Applied.")
}
fmt.Println("Done.")
}