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【推荐】负载均衡很难？看完这篇全懂了
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互联网早期，业务流量比较小并且业务逻辑比较简单，单台服务器便可以满足基本的需求；但随着互联网的发展，业务流量越来越大并且业务逻辑也越来越复杂，单台机器的性能问题以及单点问题凸显了出来，因此需要多台机器来进行性能的水平扩展以及避免单点故障。
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