> For the complete documentation index, see [llms.txt](https://docs.natsclub.cn/cn/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.natsclub.cn/cn/yi-chan/stan/intro/ft/standby-server.md).

# Standby Servers

There can be as many standby servers as you want in the same group. These servers do not access the store and do not receive any data from the streaming clients. They are just running waiting for the detection of the active server failure.