版本支持策略：同样的服务(方法)在整个系统中可能会有多个版本。
Versioning support policies: the same service (method) can exist in the overall system in multiple versions.
通过为实例准备备份与恢复策略，可在遇到实例损坏问题时，不必进行整个操作系统恢复。
By putting together a backup and recovery strategy for an instance, you can potentially avoid having to do a complete operating system restore when faced with a compromised instance.
因此，制定连续监测系统整体运行状况的良好策略，是整个故障诊断计划中一个重要的部分。
Therefore, having a good policy for continuous monitoring of the overall health of the system is an important part of an overall troubleshooting plan.
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