Hey,
Yes, you can use either of these commands depending on whether or not you are using containers to get live OSDs's bluestore fragmentation:
ceph daemon osd.0 bluestore allocator score block
or
cephadm shell ceph daemon osd.0 bluestore allocator score block
...
{
"fragmentation_rating": 0.060519485819245739
}
Regards,
Frédéric.
----- Le 16 Sep 24, à 8:27, Istvan Szabo, Agoda Istvan.Szabo@xxxxxxxxx a écrit :
> Hi,
>
> Is there any way to pull out the fragmentation value from the disk somehow
> without shutdown the osd and run the ceph-objectstore-tool command?
>
> We had a total outage last week which is based on multiple bugs but most of them
> are down to disk fragmentation which is super high in our case.
>
> I'm trying to find in the logs and in ceph metrics some hint but I couldn't find
> anything how I can monitor or at least check this value:
>
> ceph-bluestore-tool --path /var/lib/ceph/osd/ceph-218/ --command free-score
>
> block: { "fragmentation_rating": 0.90989583876508828 }
> bluefs-db: { "fragmentation_rating": 0.41012391001249843 }
>
> failure querying 'bluefs-wal'
> 2024-09-15T12:19:31.814+0700 7f90c66d00c0 -1 asok(0x55c637e7c000) AdminSocket:
> request '[{"prefix": "bluestore allocator score bluefs-wal"}]' not defined
>
> Thank you
>
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