mongodb重启引起数据丢失 续
今天看到官方Blog的一篇文章，http://blog.mongodb.org/post/248614779/fast-updates-with-mongodb-update-in-place上面写道：MongoDB disk writes are lazy.If we receive 1,000 increments in one second for the object, it will only be written once.Physical writes occur a couple of seconds after the operation.
以此可知，当1秒钟后写入第二次时，mongodb必定会物理写入磁盘，改方法已经测试通过。
linux下测试结果：一定时间之后会自动写入数据到磁盘。
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