[gpfsug-discuss] Question regarding quorum nodes

[Robert Horton]

You can, although there's a curious restriction that you can only do one at a time (though I guess that's not an issue for you).

I've only ever tried it on a cluster I was in the process of decommissioning anyway but it worked as expected.

-----Original Message-----
From: gpfsug-discuss <gpfsug-discuss-bounces at gpfsug.org> On Behalf Of Tina Friedrich
Sent: 07 September 2023 14:45
To: Danny Lang <danny.lang at crick.ac.uk>; gpfsug-discuss at gpfsug.org
Cc: theteam at arc.ox.ac.uk
Subject: Re: [gpfsug-discuss] Question regarding quorum nodes

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Thanks - I know the command.

Can I remove quorum functionality from a node that is down - that's really what I want to know, I think. Is that safe to do?

Tina

On 07/09/2023 14:39, Danny Lang wrote:
> Hi Tina,
>
> The command you're looking for is:
>
>
> *mmchnode*
>
> https://www.ibm.com/docs/en/storage-scale/4.2.0?topic=commands-mmchnod
> e-command
> <https://www.ibm.com/docs/en/storage-scale/4.2.0?topic=commands-mmchno
> de-command>
>
> This will allow you to add quorum nodes and to remove.
>
> ------
>
> I would advise checking everything prior to running commands. 🙂
>
> Thanks
> Danny
>
> ----------------------------------------------------------------------
> --
> *From:* gpfsug-discuss <gpfsug-discuss-bounces at gpfsug.org> on behalf
> of Tina Friedrich <tina.friedrich at it.ox.ac.uk>
> *Sent:* 07 September 2023 2:28 PM
> *To:* gpfsug-discuss at gpfsug.org <gpfsug-discuss at gpfsug.org>
> *Cc:* theteam at arc.ox.ac.uk <theteam at arc.ox.ac.uk>
> *Subject:* [gpfsug-discuss] Question regarding quorum nodes
>
> External Sender: Use caution.
>
>
> Hello All,
>
> I hope someone can answer this quickly!
>
> We have - it seems - just lost one of our NSDs.The other took over as
> it should - but unfortunately, the protocol nodes (i.e. I have a
> number of nodes which now have stale file handles. (The file system is
> accessible on the remaining NSD server and a number of other clients.)
>
> Unfortunately, in the 'home' cluster - the one that ones the disks - I
> only have, five servers; three of which are quorum nodes, and of
> course the failed NSD server is one of them.
>
> The question is - can I add quorum nodes with one node down, and can I
> remove quorum functionality from a failed node?
>
> Tina
>
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