如何远程同步两套？

Question

I need to synchronize two large sets of strings in Java, one of the on the client and the other on the server. Most probably the client is missing a couple of entries which it should receive from the server. I don't want to transfer all members, I want to minimize the communication and the computation on the server (the client may work harder).

Any idea besides divide-and-conquer?

I'm not asking about the communication technology or alike, I'm only interested in a good algorithm. I think something like what version control does would be optimal, but I'm afraid I can't do it this way.

Answer 1

You can keep a generation counter for the set on the server along with a change log for each generation. The client can request all changes since the last synchronization. It can then integrate those changes and also (if applicable) send back any remaining client-side changes since the last synchronization.

Answer 2

你可以使用套接字，首先同步所有成员然后使用自定义方法添加和删除本地集中的成员并发送数据+指令到另一端你也可以使用jmx active mq