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这已经有成熟的解决方案了，不用再造轮子，可以了解一下brdb及heartbeat

试试LVS吧

请问张师兄：
    如何使用PHP+Socket编程发送数据包（或文件）？
    条件：系统双方具有重发机制：每次发送数据包的时候，带有发送次数，当另一端接受数据包后，将返回应答信息，如果在规定的时间内（每30S），没有收到应答信息，将重新发送，发送次数加+1，达到N次后（N值=100），将不再重新发送。在双方的界面上能体现失败。
   张师兄能否给个例子程序？在此感谢！！

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