Great! I have raised an Enhancement tracker for a patch to make the balancer smarter about alerting users on this. You are welcome to follow it or add any comments: https://tracker.ceph.com/issues/70615 Thanks, Laura On Sat, Mar 22, 2025 at 6:53 AM Marek Szuba <scriptkiddie@wp.pl> wrote:
On 2025-03-21 18:37, Laura Flores wrote:
If you have been using the read balancer, you may see `pg_upmap_primary` mappings in the osdmap despite changing the mode back to just upmap. Changing the mode to "upmap" only means that no further read balancing will occur, so at this time, the mappings need to be manually cleared if you don't want them anymore.
Ah, that explains it! I have indeed seen such mappings in the osdmap but didn't realise they wouldn't go away on its own.
To remove the mappings, first run: [...]
Done, and afterwards I was indeed able to switch back to Luminous compatibility. Thank you for your help!
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-- Laura Flores She/Her/Hers Software Engineer, Ceph Storage <https://ceph.io> Chicago, IL lflores@ibm.com | lflores@redhat.com <lflores@redhat.com> M: +17087388804