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You should be able to remove a node from quorum and it should be fairly safe. </div>
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This is assuming you're on CCR. <br>
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You can find the type with:</div>
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mmlscluster</div>
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Thanks</div>
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Danny<br>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Ott Oopkaup <ott.oopkaup@ut.ee><br>
<b>Sent:</b> 07 September 2023 2:51 PM<br>
<b>To:</b> gpfsug main discussion list <gpfsug-discuss@gpfsug.org>; Tina Friedrich <tina.friedrich@it.ox.ac.uk>; Danny Lang <danny.lang@crick.ac.uk><br>
<b>Cc:</b> theteam@arc.ox.ac.uk <theteam@arc.ox.ac.uk><br>
<b>Subject:</b> Re: [gpfsug-discuss] Question regarding quorum nodes</font>
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External Sender: Use caution.<br>
<br>
<br>
Hi<br>
Do you have quorum loss already, or just trying to remove a node that is<br>
currently offline. Over the years I have had little to no problems<br>
removing quorum from a defunct node. Just make sure mmgetstate for the<br>
node is down and it should be fine to remove, since it's already out of<br>
the cluster.<br>
Just make sure you don't induce quorum loss with the moves. I'd probably<br>
add the node first after making sure the defunct node is completely down.<br>
<br>
Best<br>
<br>
Ott Oopkaup<br>
University of Tartu, High Performance Computing Centre<br>
<br>
On 9/7/23 16:45, Tina Friedrich wrote:<br>
> Thanks - I know the command.<br>
><br>
> Can I remove quorum functionality from a node that is down - that's<br>
> really what I want to know, I think. Is that safe to do?<br>
><br>
> Tina<br>
><br>
> On 07/09/2023 14:39, Danny Lang wrote:<br>
>> Hi Tina,<br>
>><br>
>> The command you're looking for is:<br>
>><br>
>><br>
>> *mmchnode*<br>
>><br>
>> <a href="https://www.ibm.com/docs/en/storage-scale/4.2.0?topic=commands-mmchnode-command">
https://eur03.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ibm.com%2Fdocs%2Fen%2Fstorage-scale%2F4.2.0%3Ftopic%3Dcommands-mmchnode-command&data=05%7C01%7C%7Ccdb5b906ab3b4d93d75f08dbafa98ff2%7C4eed7807ebad415aa7a99170947f4eae%7C0%7C0%7C638296915030390070%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=qS0JSTfvO01vihhdvIVXc2N4%2BwkXeCxINM%2F4yhd9s9A%3D&reserved=0</a><br>
>> <<a href="https://www.ibm.com/docs/en/storage-scale/4.2.0?topic=commands-mmchnode-command">https://eur03.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ibm.com%2Fdocs%2Fen%2Fstorage-scale%2F4.2.0%3Ftopic%3Dcommands-mmchnode-command&data=05%7C01%7C%7Ccdb5b906ab3b4d93d75f08dbafa98ff2%7C4eed7807ebad415aa7a99170947f4eae%7C0%7C0%7C638296915030390070%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=qS0JSTfvO01vihhdvIVXc2N4%2BwkXeCxINM%2F4yhd9s9A%3D&reserved=0</a>><br>
>><br>
>><br>
>> This will allow you to add quorum nodes and to remove.<br>
>><br>
>> ------<br>
>><br>
>> I would advise checking everything prior to running commands. ðŸ™‚<br>
>><br>
>> Thanks<br>
>> Danny<br>
>><br>
>> ------------------------------------------------------------------------<br>
>> *From:* gpfsug-discuss <gpfsug-discuss-bounces@gpfsug.org> on behalf<br>
>> of Tina Friedrich <tina.friedrich@it.ox.ac.uk><br>
>> *Sent:* 07 September 2023 2:28 PM<br>
>> *To:* gpfsug-discuss@gpfsug.org <gpfsug-discuss@gpfsug.org><br>
>> *Cc:* theteam@arc.ox.ac.uk <theteam@arc.ox.ac.uk><br>
>> *Subject:* [gpfsug-discuss] Question regarding quorum nodes<br>
>><br>
>> External Sender: Use caution.<br>
>><br>
>><br>
>> Hello All,<br>
>><br>
>> I hope someone can answer this quickly!<br>
>><br>
>> We have - it seems - just lost one of our NSDs.The other took over as it<br>
>> should - but unfortunately, the protocol nodes (i.e. I have a number of<br>
>> nodes which now have stale file handles. (The file system is accessible<br>
>> on the remaining NSD server and a number of other clients.)<br>
>><br>
>> Unfortunately, in the 'home' cluster - the one that ones the disks - I<br>
>> only have, five servers; three of which are quorum nodes, and of course<br>
>> the failed NSD server is one of them.<br>
>><br>
>> The question is - can I add quorum nodes with one node down, and can I<br>
>> remove quorum functionality from a failed node?<br>
>><br>
>> Tina<br>
>><br>
>> _______________________________________________<br>
>> gpfsug-discuss mailing list<br>
>> gpfsug-discuss at gpfsug.org<br>
>> <a href="http://gpfsug.org/mailman/listinfo/gpfsug-discuss_gpfsug.org">https://eur03.safelinks.protection.outlook.com/?url=http%3A%2F%2Fgpfsug.org%2Fmailman%2Flistinfo%2Fgpfsug-discuss_gpfsug.org&data=05%7C01%7C%7Ccdb5b906ab3b4d93d75f08dbafa98ff2%7C4eed7807ebad415aa7a99170947f4eae%7C0%7C0%7C638296915030390070%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=qMXTGt6c8Oc8voYd1MLVOfYXTzgob6YSDsYTrk%2BUIAM%3D&reserved=0</a><br>
>> <<a href="http://gpfsug.org/mailman/listinfo/gpfsug-discuss_gpfsug.org">https://eur03.safelinks.protection.outlook.com/?url=http%3A%2F%2Fgpfsug.org%2Fmailman%2Flistinfo%2Fgpfsug-discuss_gpfsug.org&data=05%7C01%7C%7Ccdb5b906ab3b4d93d75f08dbafa98ff2%7C4eed7807ebad415aa7a99170947f4eae%7C0%7C0%7C638296915030390070%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=qMXTGt6c8Oc8voYd1MLVOfYXTzgob6YSDsYTrk%2BUIAM%3D&reserved=0</a>><br>
>><br>
>> The Francis Crick Institute Limited is a registered charity in<br>
>> England and Wales no. 1140062 and a company registered in England and<br>
>> Wales no. 06885462, with its registered office at 1 Midland Road<br>
>> London NW1 1AT<br>
>><br>
><br>
> _______________________________________________<br>
> gpfsug-discuss mailing list<br>
> gpfsug-discuss at gpfsug.org<br>
> <a href="http://gpfsug.org/mailman/listinfo/gpfsug-discuss_gpfsug.org">https://eur03.safelinks.protection.outlook.com/?url=http%3A%2F%2Fgpfsug.org%2Fmailman%2Flistinfo%2Fgpfsug-discuss_gpfsug.org&data=05%7C01%7C%7Ccdb5b906ab3b4d93d75f08dbafa98ff2%7C4eed7807ebad415aa7a99170947f4eae%7C0%7C0%7C638296915030390070%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=qMXTGt6c8Oc8voYd1MLVOfYXTzgob6YSDsYTrk%2BUIAM%3D&reserved=0</a><br>
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The Francis Crick Institute Limited is a registered charity in England and Wales no. 1140062 and a company registered in England and Wales no. 06885462, with its registered office at 1 Midland Road London NW1 1AT</p>
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