[ClusterLabs] Antw: [EXT] Re: temporary loss of quorum when member starts to rejoin

Ulrich Windl Ulrich.Windl at rz.uni-regensburg.de
Tue Apr 7 02:50:19 EDT 2020

>>> Andrei Borzenkov <arvidjaar at gmail.com> schrieb am 06.04.2020 um 22:10 in
<17546_1586203904_5E8B8D00_17546_12_1_73cdd72d-c884-05a4-6c64-2e354912c28f at gmail

> I cannot reproduce it, but I also do not use knet. From documentation I
> have impression that knet has artificial delay before it considers links
> operational, so may be that is the reason.

NICs may behave quite different: I can remember som early 1Gb model needing almost 5 seconds to negotiate a link with the switch, and the link went up/down at least twice while doing so. Recent NICs seem somewhat faster, but I think something in the 3-second area is still realistic. Maybe software waits a short while until it trusts the NIC status. I don't know...


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