[ceph-users] Re: Merge DB/WAL back to the main device?

On 4/2/25 15:46, Jan Kasprzak wrote:

I wonder whether is it possible to go the other way round as well, i.e. to remove a metadata device from an OSD and merge metadata back to the main storage?

Yes. I actually used ceph-volume last time I did this, so I wonder if I should be using a cephadm sequence to do so. I used https://docs.clyso.com/blog/ceph-volume-create-wal-db-on-separate-device-for... to figure out steps on test cluster, plus I used this to gather more info: ceph-bluestore-tool show-label --dev /dev/ceph-$fsid/osd-block-$osduuid | jq .[] `ceph-bluestore-tool bluefs-bdev-new-db` at https://docs.ceph.com/en/latest/man/8/ceph-bluestore-tool/ looks useful, but again I wonder about cephadm. HTH, Greg.