default cacheDirWrite to cacheDir

weed/command/mount.go

@@ -57,7 +57,7 @@ func init() {
 	mountOptions.concurrentWriters = cmdMount.Flag.Int("concurrentWriters", 32, "limit concurrent goroutine writers")
 	mountOptions.cacheDirForRead = cmdMount.Flag.String("cacheDir", os.TempDir(), "local cache directory for file chunks and meta data")
 	mountOptions.cacheSizeMBForRead = cmdMount.Flag.Int64("cacheCapacityMB", 0, "file chunk read cache capacity in MB")
-	mountOptions.cacheDirForWrite = cmdMount.Flag.String("cacheDirWrite", os.TempDir(), "buffer writes mostly for large files")
+	mountOptions.cacheDirForWrite = cmdMount.Flag.String("cacheDirWrite", "", "buffer writes mostly for large files")
 	mountOptions.dataCenter = cmdMount.Flag.String("dataCenter", "", "prefer to write to the data center")
 	mountOptions.allowOthers = cmdMount.Flag.Bool("allowOthers", true, "allows other users to access the file system")
 	mountOptions.umaskString = cmdMount.Flag.String("umask", "022", "octal umask, e.g., 022, 0111")

weed/command/mount_std.go

@@ -216,6 +216,11 @@ func RunMount(option *MountOptions, umask os.FileMode) bool {
 		mountRoot = mountRoot[0 : len(mountRoot)-1]
 	}
 
+	cacheDirForWrite := *option.cacheDirForWrite
+	if cacheDirForWrite == "" {
+		cacheDirForWrite = *option.cacheDirForRead
+	}
+
 	seaweedFileSystem := mount.NewSeaweedFileSystem(&mount.Option{
 		MountDirectory:     dir,
 		FilerAddresses:     filerAddresses,
@@ -229,7 +234,7 @@ func RunMount(option *MountOptions, umask os.FileMode) bool {
 		ConcurrentWriters:  *option.concurrentWriters,
 		CacheDirForRead:    *option.cacheDirForRead,
 		CacheSizeMBForRead: *option.cacheSizeMBForRead,
-		CacheDirForWrite:   *option.cacheDirForWrite,
+		CacheDirForWrite:   cacheDirForWrite,
 		DataCenter:         *option.dataCenter,
 		Quota:              int64(*option.collectionQuota) * 1024 * 1024,
 		MountUid:           uid,