[ceph-users] Re: Move WAL/DB to SSD for existing OSD?

Hi Lindays, Am 29.06.20 um 15:37 schrieb Lindsay Mathieson:

Nautilus - Bluestore OSD's created with everything on disk. Now I have some spare SSD's - can I move the location of the existing WAL and/or DB to SSD partitions without recreating the OSD?

I suspect  not - saw emails from 2018, in the negative :(

Yes you can. You need to use: ceph-bluestore-tool --path /var/lib/ceph/osd/ceph-${OSD} bluefs-bdev-new-db --dev-target /dev/bluesfs_db/db-osd${OSD} and ceph-bluestore-tool --path dev/osd1/ --devs-source dev/osd1/block --dev-target dev/osd1/block.db bluefs-bdev-migrate those are not tested and just what i remembered but it should point you in the richt direction. greets, Stefan

Failing that - is it difficult to add lvmcache to a osd?