For our customers we are still disabling mclock and using wpq. Might be worth trying. Mark On 4/30/24 09:08, Pierre Riteau wrote:
Hi Götz,
You can change the value of osd_max_backfills (for all OSDs or specific ones) using `ceph config`, but you need enable osd_mclock_override_recovery_settings. See https://docs.ceph.com/en/quincy/rados/configuration/mclock-config-ref/#steps... for more information.
Best regards, Pierre Riteau
On Sat, 27 Apr 2024 at 08:32, Götz Reinicke <goetz.reinicke@filmakademie.de> wrote:
Dear ceph community,
I’ve a ceph cluster which got upgraded from nautilus/pacific/…to reef over time. Now I added two new nodes to an existing EC pool as I did with the previous versions of ceph.
Now I face the fact, that the previous „backfilling tuning“ I’v used by increasing injectargs --osd-max-backfills=XX --osd-recovery-max-active=YY dose not work anymore.
With adjusting thous parameters the backfill was running with up to 2k +- objects/s.
As I’m not (yet) familiar with the reef opiont the only speed up so far I found is „ceph config set osd osd_mclock_profile high_recovery_ops“ which currently runs the backfill with up to 600 opbjects/s.
My question: What is a best (simple) way to speed that backfill up ?
I’v tried to understand the custom profiles (?) but without success - and did not apply anything other yet.
Thanks for feedback and suggestions ! Best regards . Götz
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