[PVE-User] osd replacement to bluestore or filestore

[Eneko Lacunza]

Hi MJ,

El 29/2/20 a las 12:21, mj escribió:
> Hi,
>
> We have a failing filestore OSD HDD in our pve 5.4 cluster on ceph 
> 12.2.13.
>
> I have ordered a replacement SSD, but we have the following doubt:
>
> Should we now replace the filestore HDD (journal on an SSD) with a 
> bluestore SSD? Or should we keep the new SSD in filestore config, in 
> order to minimise the time we run in 'mixed mode'.
>
> We have the intention to replace all filestore HDD OSDs with bluestore 
> SSDs, but not short term, starting in half year or so.
>
> So the question is really: can we run mixed bluestore/filestore ceph 
> cluster for an extended period of time? Anything particular to consider?
>
We have mixed bluestore/filestore clusters in production. Other than the 
increased RAM use by bluestore OSDs, we haven't noticed anything 
special. There was a CRC-related bug generating false warnings in 
filestore OSDs but it was fixed some time ago and eventually warnings 
stopped popping up.

Cheers
Eneko


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