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搭建高可用mongo分布式---具体操作-技术成就梦想
source link: https://blog.51cto.com/xinsir/2358314
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首先还是上图看看mongodb通过哪些机制实现路由、分片：从图中可以看到有四个组件：mongos、config server、shard、replica set。mongos，数据库集群请求的入口，所有的请求都通过mongos进行协调，不需要在应用程序添加一个路由选择器，mongos自己就是一个请求分发中心，它负责把对应的数据请求请求转发到对应的shard服务器上。在生产环境通常有多mongos作
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