从Varnish重新验证过期缓存 [英] Stale-while-revalidate cache replacement from Varnish

问题描述

我们目前正在将服务器迁移到新的PLESK 12.5服务器上，该服务器不支持PHP应用程序的Varnish缓存.

We are currently moving our servers to a new one, with PLESK 12.5 which doesn't support Varnish cache for our PHP applications.

我们使用Varnish，主要是为了实现重新验证时有效"功能，以便我们可以在刷新缓存时发送整页或部分内容(使用ESI)，而无需等待任何客户的时间.

We use Varnish, mostly for the 'stale-while-revalidate' capability, so that we can send whole pages or parts (using ESI) without any waiting time for any customer while cache is refreshing.

对于类似的缓存，Varnish是否可以替代?可以在PLESK上运行的另一个程序"，还是任何PHP/服务器缓存?

Is there any alternative to Varnish for a similar kind of cache ? Either another "program" that could run on PLESK, or any PHP/server cache ?

PLESK随NGINX一起提供，但似乎没有提供过时验证"功能；我也知道PLESK不支持Squid.

PLESK comes with NGINX, but it does not seem to provide 'stale-while-revalidate' capabilities ; I also know Squid isn't supported on PLESK.

推荐答案

实际上，nginx通过 Nginx支持缓存-自1.11.10起的控制扩展名:

Actually nginx provides stale-while-revalidate by proxy_cache_use_stale and Nginx supports Cache-Control extensions since 1.11.10:

location / {
    ...
    proxy_cache_use_stale updating error timeout http_500 http_502 http_503 http_504;
    proxy_cache_background_update on;
}

是的，它不支持Cache-Control扩展，因此，如果您的应用程序不使用Cache-Control头中的stale-while-revalidate，nginx就足够了.

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