Hitless Reloads (computing)
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Hitless reloads[1][2] is a concept in Computer Science for managing an active Web server service, where it lets active connections gracefully finish using the old configuration while bringing up new connections with the new config. If you attempt a reload with a broken config, it will give an error, but will not interrupt the previously running service.
It is commonly referred to as a feature for managing Proxy servers (e.g. NGINX, HAProxy, Envoy, Apache Tomcat etc.), Caching proxy, API Gateway proxies etc.
References[edit]
- ↑ Mhedhbi, Moemen (2018-05-31). "Hitless Reloads / Hot Restarts with HAProxy!". HAProxy Technologies.
- ↑ Tarreau, Willy (2017-05-03). "Truly Seamless Reloads with HAProxy – No More Hacks!". HAProxy Technologies.
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