MongoDB分片杂谈
MongoDB的分片很是火热，但是问题是，我们什么时候才真的需要使用分片呢？当你需要使用到如下的几个标志性的事件时，就意味着该考
什么时候需要分片？
MongoDB的分片很是火热，，但是问题是，我们什么时候才真的需要使用分片呢？当你需要使用到如下的几个标志性的事件时，就意味着该考虑使用分片了！
1、你用光了当前机器的磁盘空间
2、单个的Mongod已经无法提供你要的写入性能了
3、你想把大部分数据驻留在内存中籍此来提供更好的性能
一般意义而言，我们应该从非分片安装开始，只是到了非需要不可的时候才将Mongod转变为分片集群。
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