On Tue, Jul 27, 2021 at 1:46 PM Marcel Kuiper wrote:
>
> We recently upgraded one of our clusters from 14.2.21 to 15.2.13 and had
> some troubles with osd performance. After reading some threads we
> manually compacted the rocksdb's on all osds and hope that that will
> alleviate the problem
>
> I
Hi Robert,
We are definitely aware of this issue. It appears to often be related
to snap trimming and we believe possibly related to excessive thrashing
of the rocksdb block cache. I suspect that when bluefs_buffered_io is
enabled it hides the issue and people don't notice the problem, but
And to add some references, there is a PR on hold here:
https://github.com/ceph/ceph/pull/38044 which links some relevant
trackers entries.
Outside of large block.db removals (e.g. from backfilling or snap
trimming) we didn't notice a huge difference -- though that is not
conclusive.
There are seve
Hi Marc and Dan,
thanks for your quick responses assuring me that we did nothing totally
wrong.
Regards
--
Robert Sander
Heinlein Support GmbH
Schwedter Str. 8/9b, 10119 Berlin
http://www.heinlein-support.de
Tel: 030 / 405051-43
Fax: 030 / 405051-19
Zwangsangaben lt. §35a GmbHG:
HRB 93818 B /
Hi,
This is not a normal, It's something different I think, like a crush changes on
restart. This option will be enabled by default again in Nautilus next, so you
can use it now with 14.2.19-20
k
Sent from my iPhone
> On 14 May 2021, at 08:21, Szabo, Istvan (Agoda)
> wrote:
>
> Hi,
>
>
