[ClusterLabs] Antw: Re: design of a two-node cluster

Andrei Borzenkov arvidjaar at gmail.com
Tue Dec 8 03:01:30 EST 2015

On Tue, Dec 8, 2015 at 10:44 AM, Ulrich Windl
<Ulrich.Windl at rz.uni-regensburg.de> wrote:
>>>> Digimer <lists at alteeve.ca> schrieb am 07.12.2015 um 22:40 in Nachricht
> <5665FCDC.1030001 at alteeve.ca>:
> [...]
>> Node 1 looks up how to fence node 2, sees no delay and fences
>> immediately. Node 2 looks up how to fence node 1, sees a delay and
>> pauses. Node 2 will be dead long before the delay expires, ensuring that
>> node 2 always loses in such a case. If you have VMs on both nodes, then
>> no matter which node the delay is on, some servers will be interrupted.
> AFAIK, the cluster will try to migrate resources if a fencing is pending, but not yet complete. Is that true?

If under "migrate" you really mean "restart resources that were
located on node that became inaccessible" I seriously hope the answer
is "not", otherwise what is the point in attempting fencing in the
first place?

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