Re: Using multiple SSDs as DB

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Thank you!

Robert Sander <r.sander@xxxxxxxxxxxxxxxxxxx> schrieb am Fr. 21. Okt. 2022

> This is a bug in certain versions of ceph-volume:
>
> https://tracker.ceph.com/issues/56031
>
> It should be fixed in the latest releases.


For completeness's sake: The cluster is on 16.2.10.
Issue is resolved and marked as backported. 16.2.10 was released shortly
before the backport.
Fixed version for Pacific should be 16.2.11.

A partial workaround I found, was limiting data_devices to 8 and db_devices
to 1. This resulted in correct db usage for one db device.
I then tried 16 data 2 db: This did not work: it (would have) resulted in
extra 8 Ceph OSDs with no db device.

Best,
Christian
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