他们有时完全停机了，陷入了惊愕的状态。
最重要的“免麻烦”特性可能是完全支持滚动升级，这意味着不需要为了进行维护而停机。
And perhaps the most important "hassle-free" feature is full support for rolling upgrades-meaning zero downtime for maintenance.
在你的停机时间选择进行一项你喜欢的活动，将使你完全放松并让你精神焕发。
During your down time choose activities that you enjoy, that allow you to really relax and clear your mind.
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