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-to-modify-mclock-max-backfills-recovery-limits
for more information.
Best regards,
Pierre Riteau
On Sat, 27 Apr 2024 at 08:32, Götz Reinicke <goetz.reinicke@xxxxxxxxxxxxxxx>
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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Best Regards,
Mark Nelson
Head of Research and Development
Clyso GmbH
p: +49 89 21552391 12 | a: Minnesota, USA
w: https://clyso.com | e: mark.nelson@xxxxxxxxx
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