灾难恢复演习（Disaster Recovery Exercise） 是应用容灾的测试方案，通过灾难恢复演习可用来验证整个方案的可恢复性以及容灾服 务器的可用性，包括实战演习和模拟演习两种方...
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You change the A record when a disaster recovery exercise is run and in an actual disaster.
在执行灾难恢复测试和发生实际灾难时要修改 A 记录。
You should now focus on actually running a full disaster recovery exercise: Just recording data and "thinking seriously" about this step won't cut it.
现在应该实际运行一次完整的灾难恢复测试：仅仅记录数据并“认真考虑”这个步骤是不够的。
The disaster recovery exercise also gives your operation another benefit: You now have a ready-to-run, complete, and up-to-date testing environment.
灾难恢复计划还提供另一个好处：您现在有一个随时可以运行的完整的最新的测试环境。
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