Re: Rocksdb compaction and OSD timeout

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The bluestore configuration was 100% default when we did the upgrade and the issue happened. We have provided Igor with an OSD dump and a db dump last Friday, so hopefully you can figure out something from it.

On 9/8/23 02:48, Konstantin Shalygin wrote:
This cluster use the default settings or something for Bluestore was changed?

You can check this via `ceph config diff`

As Mark said, it will be nice to have a tracker, if this really release problem

Sent from my iPhone

On 7 Sep 2023, at 20:22, J-P Methot <jp.methot@xxxxxxxxxxxxxxxxx> wrote:

We went from 16.2.13 to 16.2.14

Also, timeout is 15 seconds because it's the default in Ceph. Basically, 15 seconds before Ceph shows a warning that OSD is timing out.

We may have found the solution, but it would be, in fact, related to bluestore_allocator and not the compaction process. I'll post the actual resolution when we confirm 100% that it works.

Jean-Philippe Méthot
Senior Openstack system administrator
Administrateur système Openstack sénior
PlanetHoster inc.
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