Hi, You should be able to remove a node from quorum and it should be fairly safe.
This is assuming you're on CCR. You can find the type with: mmlscluster Thanks Danny ________________________________ From: Ott Oopkaup <[email protected]> Sent: 07 September 2023 2:51 PM To: gpfsug main discussion list <[email protected]>; Tina Friedrich <[email protected]>; Danny Lang <[email protected]> Cc: [email protected] <[email protected]> Subject: Re: [gpfsug-discuss] Question regarding quorum nodes External Sender: Use caution. Hi Do you have quorum loss already, or just trying to remove a node that is currently offline. Over the years I have had little to no problems removing quorum from a defunct node. Just make sure mmgetstate for the node is down and it should be fine to remove, since it's already out of the cluster. Just make sure you don't induce quorum loss with the moves. I'd probably add the node first after making sure the defunct node is completely down. Best Ott Oopkaup University of Tartu, High Performance Computing Centre On 9/7/23 16:45, Tina Friedrich wrote: > 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://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<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<https://www.ibm.com/docs/en/storage-scale/4.2.0?topic=commands-mmchnode-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 <[email protected]> on behalf >> of Tina Friedrich <[email protected]> >> *Sent:* 07 September 2023 2:28 PM >> *To:* [email protected] <[email protected]> >> *Cc:* [email protected] <[email protected]> >> *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 >> >> _______________________________________________ >> gpfsug-discuss mailing list >> gpfsug-discuss at 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<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<http://gpfsug.org/mailman/listinfo/gpfsug-discuss_gpfsug.org>> >> >> 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 >> > > _______________________________________________ > gpfsug-discuss mailing list > gpfsug-discuss at 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<http://gpfsug.org/mailman/listinfo/gpfsug-discuss_gpfsug.org> 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
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