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@agoda.com 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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