adding volume type

weed/server/master_grpc_server_volume.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"fmt"
 	"github.com/chrislusf/raft"
+	"github.com/chrislusf/seaweedfs/weed/storage"
 
 	"github.com/chrislusf/seaweedfs/weed/pb/master_pb"
 	"github.com/chrislusf/seaweedfs/weed/security"
@@ -60,11 +61,16 @@ func (ms *MasterServer) Assign(ctx context.Context, req *master_pb.AssignRequest
 	if err != nil {
 		return nil, err
 	}
+	volumeType, err := storage.ToVolumeType(req.VolumeType)
+	if err != nil {
+		return nil, err
+	}
 
 	option := &topology.VolumeGrowOption{
 		Collection:         req.Collection,
 		ReplicaPlacement:   replicaPlacement,
 		Ttl:                ttl,
+		VolumeType:         volumeType,
 		Prealloacte:        ms.preallocateSize,
 		DataCenter:         req.DataCenter,
 		Rack:               req.Rack,
@@ -117,7 +123,7 @@ func (ms *MasterServer) Statistics(ctx context.Context, req *master_pb.Statistic
 		return nil, err
 	}
 
-	volumeLayout := ms.Topo.GetVolumeLayout(req.Collection, replicaPlacement, ttl)
+	volumeLayout := ms.Topo.GetVolumeLayout(req.Collection, replicaPlacement, ttl, storage.VolumeType(req.VolumeType))
 	stats := volumeLayout.Stats()
 
 	totalSize := ms.Topo.GetMaxVolumeCount() * int64(ms.option.VolumeSizeLimitMB) * 1024 * 1024