系统会为所有应用程序实例考虑负载均衡和高可用方面的事情。

The system takes care of load balancing and high-availability for all application instances.

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如果提供负载均衡的这个实例出现故障，在动态dns映像到另一个EC2实例前，整个系统就不可用了。

If the instance that provides the load balancing fails, the whole system can become unavailable until the dynamic DNS maps the domain to another EC2 instance.

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在这里，文件系统本身会在不同节点之间切换，以实现负载均衡。

Here the file system itself moves around different nodes to do load balancing.

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