ACE http health probes - best practice for interval and passdetect interval?
Is there a recommended standard for http health probes in terms of interval and passdetect interval timings, i.e. should the passdetect interval always be less than the interval or visa versa? Can a http probe be 'mis-configured', i.e. return a 'false positive' by configuring an interval timeout thats 'incompatible' with the device it's polling?
I have a http probe for a serverfarm consisting of two Apache http servers and get intermittent 'server reply timeout' probe failures. I'm keen to ensure that the configuration of the probe isn't at fault so I can be confident that a failed probe indicates a problem with the server and not my configuration.
The probe is currently configured as below:-
probe http http-apache interval 30 passdetect interval 15 passdetect count 6 request method get url /cs/images/ACE.html expect status 200 304
Any advice on the subject woud be gratefully received.
"(The) "Probe interval" should always be less then (open+recieve) timeout value. Default open & receive timeouts are 10 seconds."
Are you able to advise on whether the above is correct and if so, why? I currently have an interval value of 30 that obviously goes against the advice above (which I've interpretted to mean that if you leave the open & receive timeouts at their default settings your probe interval should be less than 20 seconds?).
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