Serving cached expired content?

[Marcus Clyne]

ryanjwh wrote:
> Our current solution works, but wastes system resources since this means that for every connection to a web server, a corresponding 2nd connection is created (to squid). What we'd prefer to do is replace the Apache+Squid solution with Nginx, but I haven't found anything in the documentation or forums/mailing lists with any mention of if Nginx can be configured to serve stale cached content if the source is down.
>
> Can anyone shed any light? Thanks!
>   
http://wiki.nginx.org/NginxHttpProxyModule#proxy_cache_use_stale