May I ask if enabling pool compression helps for the future space amplification? > George Yil <georgeyil75@xxxxxxxxx> şunları yazdı (27 Oca 2021 18:57): > > Thank you. This helps a lot. > >> Josh Baergen <jbaergen@xxxxxxxxxxxxxxxx> şunları yazdı (27 Oca 2021 17:08): >> >> On Wed, Jan 27, 2021 at 12:24 AM George Yil <georgeyil75@xxxxxxxxx> wrote: >>> May I ask if it can be dynamically changed and any disadvantages should be expected? >> >> Unless there's some magic I'm unaware of, there is no way to >> dynamically change this. Each OSD must be recreated with the new >> min_alloc_size setting. In production systems this can be quite the >> chore, since the safest way to accomplish this is to drain the OSD >> (set it 'out', use CRUSH map changes, or use upmaps), recreate it, and >> then repopulate it. With automation this can run in the background. >> Given how much room you have currently you may be able to do this >> host-at-a-time by storing a host's data on the other hosts in a given >> rack (though I don't remember what your CRUSH tree looks like so maybe >> you can't do this and maintain host independence). >> >> The downside is potentially more tracking metadata at the OSD level, >> though I understand that Nautilus has made improvements here. I'm not >> up to speed on the latest state in this area, though. >> >> Josh _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
 |