Hi Eugen,
Reminder: I'm looking for guidance / hints on how to migrate from
filestore to bluestore using a "per-osd device copy":
https://docs.ceph.com/en/latest/rados/operations/bluestore-migration/#per-osd-device-copy
On Fri, Oct 09, 2020 at 07:03:33AM +0000, Eugen Block wrote:
I think by "copy function" would be the "bluefs-bdev-migrate" command
from ceph-bluestore-tool, this is an excerpt from the man paage:
It looks like ceph-bluestore-tool is purely about dealing with bluestore
osds, there's no facility to migrate from filestore to bluestore.
There have been several threads about the process on this list, I
don't have a link at hand right now.
I've not been able to find any threads relating to migrating from
filestore to bluestore using a per-osd device copy - i.e. where the osd
data is copied directly from an original filestore store to
a new bluestore store, then the new store "becomes" the original osd.
The advantage of doing this would be to remove the rebalancing involved in
the simple method of creating a new bluestore osd and marking out the old
filestore osd (then rinse and repeat until all filestores have been
replaced).
Cheers,
Chris
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