DMDS adopts pair of system back-up and mirror-back-up memory technology. So the system has high reliability of metadata management.

具有容错能力的双元数据服务器采用双系统备份、镜像复制存储技术，从而保证了元数据管理的高可靠。

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At a convenient time, we'd want to shut down the system, replace the failed drive, and start the system back up again.

在方便的时侯，我们将希望关闭系统，更换故障驱动器，并且重新启动系统。

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At a convenient time, we'd want to shut down the system, replace the failed drive, and start the system back up again.

在方便的时侯，我们将希望关闭系统，更换故障驱动器，并且重新启动系统。

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