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From "Akins, Brian" <>
Subject Re: ping for http in mod_proxy
Date Wed, 13 Feb 2008 17:34:07 GMT
On 2/13/08 12:27 PM, "Plüm, Rüdiger, VF-Group" <>

> This does not help with race conditions on HTTP keepalive connections.
> Nevertheless active healthchecking could be useful. But on a busy site
> I guess a real request will notice before the healthcheck that one backend
> is down or the frequence of health checks needs to be insane.

On a busy site you want to know if a server is down before you send a few
thousand requests to it and want to know that it's up as soon as it's
available so you can send a few thousand requests to it.

Brian Akins
Chief Operations Engineer
Turner Digital Media Technologies

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