Many people have reported that they need to lower the osd recovery config
options to minimize the impact of recovery on client io. We are talking about
changing the defaults as follows:
osd_max_backfills to 1 (from 10)
osd_recovery_max_active to 3 (from 15)
osd_recovery_op_priority to 1 (from 1
On Fri, May 29, 2015 at 5:47 PM, Samuel Just wrote:
> Many people have reported that they need to lower the osd recovery config
> options to minimize the impact of recovery on client io. We are talking
> about changing the defaults as follows:
>
> osd_max_backfills to 1 (from 10)
> osd_recovery
7;ceph-us...@lists.ceph.com' (ceph-us...@lists.ceph.com)
Subject: Discuss: New default recovery config settings
Many people have reported that they need to lower the osd recovery config
options to minimize the impact of recovery on client io. We are talking about
changing the defaults as follows:
osd_ma
On Fri, May 29, 2015 at 2:47 PM, Samuel Just wrote:
> Many people have reported that they need to lower the osd recovery config
> options to minimize the impact of recovery on client io. We are talking
> about changing the defaults as follows:
>
> osd_max_backfills to 1 (from 10)
> osd_recovery
On Fri, May 29, 2015 at 5:47 PM, Samuel Just wrote:
> Many people have reported that they need to lower the osd recovery config
> options to minimize the impact of recovery on client io. We are talking
> about changing the defaults as follows:
>
> osd_max_backfills to 1 (from 10)
> osd_recovery
On Fri, May 29, 2015 at 4:18 PM, Gregory Farnum wrote:
> On Fri, May 29, 2015 at 2:47 PM, Samuel Just wrote:
> > Many people have reported that they need to lower the osd recovery config
> > options to minimize the impact of recovery on client io. We are talking
> > about changing the defaults
On Mon, Jun 1, 2015 at 6:39 PM, Paul Von-Stamwitz
wrote:
> On Fri, May 29, 2015 at 4:18 PM, Gregory Farnum wrote:
>> On Fri, May 29, 2015 at 2:47 PM, Samuel Just wrote:
>> > Many people have reported that they need to lower the osd recovery config
>> > options to minimize the impact of recovery
On Mon, 1 Jun 2015, Gregory Farnum wrote:
> On Mon, Jun 1, 2015 at 6:39 PM, Paul Von-Stamwitz
> wrote:
> > On Fri, May 29, 2015 at 4:18 PM, Gregory Farnum wrote:
> >> On Fri, May 29, 2015 at 2:47 PM, Samuel Just wrote:
> >> > Many people have reported that they need to lower the osd recovery
>
On Wed, Jun 3, 2015 at 3:44 PM, Sage Weil wrote:
> On Mon, 1 Jun 2015, Gregory Farnum wrote:
>> On Mon, Jun 1, 2015 at 6:39 PM, Paul Von-Stamwitz
>> wrote:
>> > On Fri, May 29, 2015 at 4:18 PM, Gregory Farnum wrote:
>> >> On Fri, May 29, 2015 at 2:47 PM, Samuel Just wrote:
>> >> > Many people h
With a write-heavy RBD workload, I add the following to ceph.conf:
osd_max_backfills = 2
osd_recovery_max_active = 2
If things are going well during recovery (i.e. guests happy and no slow
requests), I will often bump both up to three:
# ceph tell osd.* injectargs '--osd-max-backfills 3
--os
We had to disable deep scrub or the cluster would me unusable - we need to turn
it back on sooner or later, though.
With minimal scrubbing and recovery settings, everything is mostly good. Turned
out many issues we had were due to too few PGs - once we increased them from 4K
to 16K everything sp
On 06/01/15 09:43, Jan Schermer wrote:
> We had to disable deep scrub or the cluster would me unusable - we need to
> turn it back on sooner or later, though.
> With minimal scrubbing and recovery settings, everything is mostly good.
> Turned out many issues we had were due to too few PGs - once
hi,jan
2015-06-01 15:43 GMT+08:00 Jan Schermer :
> We had to disable deep scrub or the cluster would me unusable - we need to
> turn it back on sooner or later, though.
> With minimal scrubbing and recovery settings, everything is mostly good.
> Turned out many issues we had were due to too few
Slow requests are not exactly tied to the PG number, but we were getting slow
requests whenever backfills or recoveries fired up - increasing the number of
PGs helped with this as the “blocks” of work are much smaller than before.
We have roughly the same number of OSDs as you but only one reall
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