package shell import ( "flag" "fmt" "github.com/chrislusf/seaweedfs/weed/pb/master_pb" "github.com/chrislusf/seaweedfs/weed/storage/types" "github.com/chrislusf/seaweedfs/weed/wdclient" "io" "time" "github.com/chrislusf/seaweedfs/weed/storage/needle" ) func init() { Commands = append(Commands, &commandVolumeTierMove{}) } type commandVolumeTierMove struct { } func (c *commandVolumeTierMove) Name() string { return "volume.tier.move" } func (c *commandVolumeTierMove) Help() string { return `change a volume from one disk type to another volume.tier.move -fromDiskType=hdd -toDiskType=ssd [-collection=""] [-fullPercent=95] [-quietFor=1h] Even if the volume is replicated, only one replica will be changed and the rest replicas will be dropped. So "volume.fix.replication" and "volume.balance" should be followed. ` } func (c *commandVolumeTierMove) Do(args []string, commandEnv *CommandEnv, writer io.Writer) (err error) { if err = commandEnv.confirmIsLocked(); err != nil { return } tierCommand := flag.NewFlagSet(c.Name(), flag.ContinueOnError) collection := tierCommand.String("collection", "", "the collection name") fullPercentage := tierCommand.Float64("fullPercent", 95, "the volume reaches the percentage of max volume size") quietPeriod := tierCommand.Duration("quietFor", 24*time.Hour, "select volumes without no writes for this period") source := tierCommand.String("fromDiskType", "", "the source disk type") target := tierCommand.String("toDiskType", "", "the target disk type") applyChange := tierCommand.Bool("force", false, "actually apply the changes") if err = tierCommand.Parse(args); err != nil { return nil } fromDiskType := types.ToDiskType(*source) toDiskType := types.ToDiskType(*target) if fromDiskType == toDiskType { return fmt.Errorf("source tier %s is the same as target tier %s", fromDiskType, toDiskType) } // collect topology information topologyInfo, volumeSizeLimitMb, err := collectTopologyInfo(commandEnv) if err != nil { return err } // collect all volumes that should change volumeIds, err := collectVolumeIdsForTierChange(commandEnv, topologyInfo, volumeSizeLimitMb, fromDiskType, *collection, *fullPercentage, *quietPeriod) if err != nil { return err } fmt.Printf("tier move volumes: %v\n", volumeIds) _, allLocations := collectVolumeReplicaLocations(topologyInfo) for _, vid := range volumeIds { if err = doVolumeTierMove(commandEnv, writer, *collection, vid, toDiskType, allLocations, *applyChange); err != nil { fmt.Printf("tier move volume %d: %v\n", vid, err) } } return nil } func isOneOf(server string, locations []wdclient.Location) bool { for _, loc := range locations { if server == loc.Url { return true } } return false } func doVolumeTierMove(commandEnv *CommandEnv, writer io.Writer, collection string, vid needle.VolumeId, toDiskType types.DiskType, allLocations []location, applyChanges bool) (err error) { // find volume location locations, found := commandEnv.MasterClient.GetLocations(uint32(vid)) if !found { return fmt.Errorf("volume %d not found", vid) } // find one server with the most empty volume slots with target disk type hasFoundTarget := false keepDataNodesSorted(allLocations, toDiskType) fn := capacityByFreeVolumeCount(toDiskType) for _, dst := range allLocations { if fn(dst.dataNode) > 0 && !hasFoundTarget { // ask the volume server to replicate the volume if isOneOf(dst.dataNode.Id, locations) { continue } sourceVolumeServer := "" for _, loc := range locations { if loc.Url != dst.dataNode.Id { sourceVolumeServer = loc.Url } } if sourceVolumeServer == "" { continue } fmt.Fprintf(writer, "moving volume %d from %s to %s with disk type %s ...\n", vid, sourceVolumeServer, dst.dataNode.Id, toDiskType.ReadableString()) hasFoundTarget = true if !applyChanges { break } // mark all replicas as read only if err = markVolumeReadonly(commandEnv.option.GrpcDialOption, vid, locations); err != nil { return fmt.Errorf("mark volume %d as readonly on %s: %v", vid, locations[0].Url, err) } if err = LiveMoveVolume(commandEnv.option.GrpcDialOption, vid, sourceVolumeServer, dst.dataNode.Id, 5*time.Second, toDiskType.ReadableString()); err != nil { return fmt.Errorf("move volume %d %s => %s : %v", vid, locations[0].Url, dst.dataNode.Id, err) } // remove the remaining replicas for _, loc := range locations { if loc.Url != dst.dataNode.Id { if err = deleteVolume(commandEnv.option.GrpcDialOption, vid, loc.Url); err != nil { fmt.Fprintf(writer, "failed to delete volume %d on %s\n", vid, loc.Url) } } } } } if !hasFoundTarget { fmt.Fprintf(writer, "can not find disk type %s for volume %d\n", toDiskType.ReadableString(), vid) } return nil } func collectVolumeIdsForTierChange(commandEnv *CommandEnv, topologyInfo *master_pb.TopologyInfo, volumeSizeLimitMb uint64, sourceTier types.DiskType, selectedCollection string, fullPercentage float64, quietPeriod time.Duration) (vids []needle.VolumeId, err error) { quietSeconds := int64(quietPeriod / time.Second) nowUnixSeconds := time.Now().Unix() fmt.Printf("collect %s volumes quiet for: %d seconds\n", sourceTier, quietSeconds) vidMap := make(map[uint32]bool) eachDataNode(topologyInfo, func(dc string, rack RackId, dn *master_pb.DataNodeInfo) { for _, diskInfo := range dn.DiskInfos { for _, v := range diskInfo.VolumeInfos { if v.Collection == selectedCollection && v.ModifiedAtSecond+quietSeconds < nowUnixSeconds && types.ToDiskType(v.DiskType) == sourceTier { if float64(v.Size) > fullPercentage/100*float64(volumeSizeLimitMb)*1024*1024 { vidMap[v.Id] = true } } } } }) for vid := range vidMap { vids = append(vids, needle.VolumeId(vid)) } return }