使用滚动升级特性允许您使用最少的、甚至零停机时间升级集群。

Using the rolling upgrade feature allows you to upgrade the cluster with zero or minimal down time.

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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.

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在本文中，术语滚动升级（rolling upgrade） 用于指这个特性。

Throughout this article, the term rolling upgrade is used to refer to this feature.

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