filer.sync: replicate outside of either cluster, only need to see filers

weed/replication/sink/filersink/fetch_write.go

@@ -30,6 +30,7 @@ func (fs *FilerSink) replicateChunks(sourceChunks []*filer_pb.FileChunk, path st
 			replicatedChunk, e := fs.replicateOneChunk(chunk, path)
 			if e != nil {
 				err = e
+				return
 			}
 			replicatedChunks[index] = replicatedChunk
 		}(sourceChunk, chunkIndex)
@@ -97,6 +98,9 @@ func (fs *FilerSink) fetchAndWrite(sourceChunk *filer_pb.FileChunk, path string)
 	}
 
 	fileUrl := fmt.Sprintf("http://%s/%s", host, fileId)
+	if fs.writeChunkByFiler {
+		fileUrl = fmt.Sprintf("http://%s/?proxyChunkId=%s", fs.address, fileId)
+	}
 
 	glog.V(4).Infof("replicating %s to %s header:%+v", filename, fileUrl, header)