ec: generate and copy .vif file

weed/storage/erasure_coding/ec_volume.go

@@ -9,6 +9,7 @@ import (
 	"sync"
 	"time"
 
+	"github.com/chrislusf/seaweedfs/weed/pb"
 	"github.com/chrislusf/seaweedfs/weed/pb/master_pb"
 	"github.com/chrislusf/seaweedfs/weed/storage/idx"
 	"github.com/chrislusf/seaweedfs/weed/storage/needle"
@@ -56,6 +57,12 @@ func NewEcVolume(dir string, collection string, vid needle.VolumeId) (ev *EcVolu
 		return nil, fmt.Errorf("cannot open ec volume journal %s.ecj: %v", baseFileName, err)
 	}
 
+	// read volume info
+	ev.Version = needle.Version3
+	if volumeInfo, found := pb.MaybeLoadVolumeInfo(baseFileName + ".vif"); found {
+		ev.Version = needle.Version(volumeInfo.Version)
+	}
+
 	ev.ShardLocations = make(map[ShardId][]string)
 
 	return