Re: Lousy recovery for mclock and reef

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Hey Chris,

A number of users have been reporting issues with recovery on Reef
with mClock. Most folks have had success reverting to
osd_op_queue=wpq. AIUI 18.2.3 should have some mClock improvements but
I haven't looked at the list myself yet.

Josh

On Fri, May 24, 2024 at 10:55 AM Mazzystr <mazzystr@xxxxxxxxx> wrote:
>
> Hi all,
> Goodness I'd say it's been at least 3 major releases since I had to do a
> recovery.  I have disks with 60-75,000 power_on_hours.  I just updated from
> Octopus to Reef last month and I'm hit with 3 disk failures and the mclock
> ugliness.  My recovery is moving at a wondrous 21 mb/sec after some serious
> hacking.  It started out at 9 mb/sec.
>
> My hosts are showing minimal cpu use.  normal mem use.  0-6% disk
> business.  Load is minimal so processes aren't blocked by disk io.
>
> I tried the changing all the sleeps and recovery_max and
> setting osd_mclock_profile high_recovery_ops to no change in performance.
>
> Does anyone have any suggestions to improve performance?
>
> Thanks,
> /Chris C
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