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Some other notes... I really wish there was better documentation for the individual resources. from the clusterlabs website, I cannot find a page that describes "ping" in any detail.</div>
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There's been some suggestions about using the same host more than once. I suspect that only really works if you disable fping (but I haven't tried.)</div>
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<span style="margin:0px;font-size:12pt">The description for timeout is "how long, in seconds, to wait before delcaring a ping lost". That kind of sounds like it means that each ping is allowed to take "<timeout> seconds", but in the fping case it really means
"the total time to wait, in seconds, before declaring the ping monitor has failed." I suppose it depends on how you interpret "a ping": does it mean one instance of the ping command or one ICMP echo?</span><br>
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>From the script, the timeout value allowed per ping is actually "timeout * 1000 / attempts". That's for fping. If fping isn't used, it's "timeout" per instance of ping being run.</div>
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As an example, using timeout=5,attempts=5 with fping results in fping retruing after a maximum of 6 seconds, whereas with ping, it can take 9-10 seconds to return. To get equivalent behaviour to ping with fping, there should be a "-i 1000" added to its command
line. This behaviour difference is very significant because a disruption to the network for 1 second can make fping report a failure when ping wouldn't. Unless you dig into the source code, and can comprehend the differences, there's no reason to want to use
one or the other.</div>
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The ping resource is very important and needs much better documentation, and perhaps should be more than one reasource ... if only there wasn't the problem of backwards compatibility.</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Users <users-bounces@clusterlabs.org> on behalf of martin doc <db1280@hotmail.com><br>
<b>Sent:</b> Monday, 18 October 2021 5:35 AM<br>
<b>To:</b> users@clusterlabs.org <users@clusterlabs.org><br>
<b>Subject:</b> Re: [ClusterLabs] Trying to understand dampening (ping)</font>
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The use case is to detect if the network path to the default gateway has failed in one of 3 hosts. The use of "ping" covers cable failure, SFP failure, or some other sort of failure that is local to a single host.</div>
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In none of the reading I did on the web was there ever a sentence that said "dampen is not active if failure_score is not 0."</div>
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Given the incompatibility between the two attributes, should both coexist on the same resource?</div>
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