With redundancy being the key feature of an ha cluster, the components that are essential in this example are node management, a distributed file system, volume management, and monitoring.
由于冗余是ha集群的关键特性，因而在这个例子中基本的组成部分包括节点管理、分布式文件系统、卷管理和监控。
Storage system (volume) can be assigned to more than one storage group.
存储系统(卷)可指派给一个以上的存储组。
Objects on a system could be files, file systems, volume groups, devices, and more.
系统上的对象可以是文件、文件系统、卷组、设备等。
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