rename, fix wrong logic.

other/java/client/src/main/proto/filer.proto

@@ -96,7 +96,7 @@ message ListEntriesResponse {
 
 message RemoteEntry {
     string storage_name = 1;
-    int64 local_mtime = 2;
+    int64 last_local_sync_ts_ms = 2;
     string remote_e_tag = 3;
     int64 remote_mtime = 4;
     int64 remote_size = 5;

weed/command/filer_remote_sync.go

@@ -239,7 +239,7 @@ func shouldSendToRemote(entry *filer_pb.Entry) bool {
 	if entry.RemoteEntry == nil {
 		return true
 	}
-	if entry.RemoteEntry.LocalMtime < entry.Attributes.Mtime {
+	if entry.RemoteEntry.LastLocalSyncTsNs/1e9 < entry.Attributes.Mtime {
 		return true
 	}
 	return false

weed/pb/filer.proto

@@ -96,7 +96,7 @@ message ListEntriesResponse {
 
 message RemoteEntry {
     string storage_name = 1;
-    int64 local_mtime = 2;
+    int64 last_local_sync_ts_ns = 2;
     string remote_e_tag = 3;
     int64 remote_mtime = 4;
     int64 remote_size = 5;

weed/server/filer_grpc_server_remote.go

@@ -153,7 +153,7 @@ func (fs *FilerServer) DownloadToLocal(ctx context.Context, req *filer_pb.Downlo
 	newEntry := entry.ShallowClone()
 	newEntry.Chunks = chunks
 	newEntry.Remote = proto.Clone(entry.Remote).(*filer_pb.RemoteEntry)
-	newEntry.Remote.LocalMtime = entry.Mtime.Unix()
+	newEntry.Remote.LastLocalSyncTsNs = time.Now().UnixNano()
 
 	// this skips meta data log events
 

weed/shell/command_remote_cache.go

@@ -118,7 +118,7 @@ func shouldCacheToLocal(entry *filer_pb.Entry) bool {
 	if entry.RemoteEntry == nil {
 		return false
 	}
-	if entry.RemoteEntry.LocalMtime < entry.Attributes.Mtime && entry.RemoteEntry.RemoteSize > 0 {
+	if entry.RemoteEntry.LastLocalSyncTsNs == 0 && entry.RemoteEntry.RemoteSize > 0 {
 		return true
 	}
 	return false
@@ -131,7 +131,7 @@ func mayHaveCachedToLocal(entry *filer_pb.Entry) bool {
 	if entry.RemoteEntry == nil {
 		return false // should not uncache an entry that is not in remote
 	}
-	if entry.RemoteEntry.LocalMtime > 0 && len(entry.Chunks) > 0 {
+	if entry.RemoteEntry.LastLocalSyncTsNs > 0 && len(entry.Chunks) > 0 {
 		return true
 	}
 	return false

weed/shell/command_remote_mount.go

@@ -234,6 +234,16 @@ func (c *commandRemoteMount) saveMountMapping(commandEnv *CommandEnv, writer io.
 	return nil
 }
 
+// if an entry has synchronized metadata but has not synchronized content
+//    entry.Attributes.FileSize == entry.RemoteEntry.RemoteSize
+//    entry.Attributes.Mtime    == entry.RemoteEntry.RemoteMtime
+//    entry.RemoteEntry.LastLocalSyncTsNs == 0
+// if an entry has synchronized metadata but has synchronized content before
+//    entry.Attributes.FileSize == entry.RemoteEntry.RemoteSize
+//    entry.Attributes.Mtime    == entry.RemoteEntry.RemoteMtime
+//    entry.RemoteEntry.LastLocalSyncTsNs > 0
+// if an entry has synchronized metadata but has new updates
+//    entry.Attributes.Mtime * 1,000,000,000    > entry.RemoteEntry.LastLocalSyncTsNs
 func doSaveRemoteEntry(client filer_pb.SeaweedFilerClient, localDir string, existingEntry *filer_pb.Entry, remoteEntry *filer_pb.RemoteEntry) error {
 	existingEntry.RemoteEntry = remoteEntry
 	existingEntry.Attributes.FileSize = uint64(remoteEntry.RemoteSize)

weed/shell/command_remote_uncache.go

@@ -89,11 +89,11 @@ func (c *commandRemoteUncache) uncacheContentData(commandEnv *CommandEnv, writer
 			return true
 		}
 
-		if entry.RemoteEntry.LocalMtime < entry.Attributes.Mtime {
+		if entry.RemoteEntry.LastLocalSyncTsNs/1e9 < entry.Attributes.Mtime {
 			return true // should not uncache an entry that is not synchronized with remote
 		}
 
-		entry.RemoteEntry.LocalMtime = 0
+		entry.RemoteEntry.LastLocalSyncTsNs = 0
 		entry.Chunks = nil
 
 		println(dir, entry.Name)