broker: add profiling

weed/messaging/broker/broker_append.go

@@ -16,6 +16,10 @@ import (
 
 func (broker *MessageBroker) appendToFile(targetFile string, topicConfig *messaging_pb.TopicConfiguration, data []byte) error {
 
+	if topicConfig.IsTransient {
+		return nil
+	}
+
 	assignResult, uploadResult, err2 := broker.assignAndUpload(topicConfig, data)
 	if err2 != nil {
 		return err2

weed/messaging/broker/broker_grpc_server_publish.go

@@ -23,7 +23,7 @@ func (broker *MessageBroker) Publish(stream messaging_pb.SeaweedMessaging_Publis
 
 	// TODO look it up
 	topicConfig := &messaging_pb.TopicConfiguration{
-
+		IsTransient: true,
 	}
 
 	// send init response