You could, for example, set auto scaling to fire up new instances based on some metric, such as incoming traffic.

例如，您可以设置自动伸缩功能，基于一些指标(比如入站流量)自动启动新实例。

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Auto scaling is an exceptionally powerful aspect of Beanstalk, putting application scalability directly into your hands.

自动伸缩功能是Beanstalk的一个极其强大的功能，将应用程序可伸缩性直接交到您手里。

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With auto scaling, you decide how many instances of your application you want running and how to trigger each new instance.

使用自动伸缩功能，能够决定要运行多少应用程序实例以及如何触发每个新实例。

youdao

Finally, application deployment and management on a PaaS provider typically comes with handy features such as auto provisioning and auto scaling.

FORBES: ROI of the Cloud, Part 1: PaaS