However, by making the server fault-tolerant, as discussed above, the client can simply resubmit the log message and wait for the acknowledgementmessage to arrive.
Once it has completed, it sends an acknowledgementmessage back to the client.
一旦处理完毕，它将发送一条确认消息给客户端。
3
If not, in other words an entry does not exist, the server processes the log message and, if successful, creates an entry in the persistence log before the acknowledgementmessage is sent.