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。

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These actions can be security configuration changes, key and certificate management, access control policy changes, bus and other system resources management, and so on.

这些操作可以是安全配置更改、密钥和证书管理、访问控制策略更改、总线和其他系统资源管理等等。

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Backup and restore capabilities are key to ensuring data recoverability for any database management system.

对于任何数据库管理系统来说，备份和恢复功能是确保数据可恢复性的关键。

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Importantly, you may choose to put in place a centralized key management system to help easily manage your encryption technology.

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The key offerings are in the server management services and system oriented architecture.

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