You're right - WAL/DB expansion capability is present in Luminous+ releases.
But David meant volume migration stuff which appeared in Nautilus, see:
https://github.com/ceph/ceph/pull/23103
Thanks,
Igor
On 2/20/2019 9:22 AM, Konstantin Shalygin wrote:
On 2/19/19 11:46 PM, David Turner wrote:
I don't know that there's anything that can be done to resolve this
yet without rebuilding the OSD. Based on a Nautilus tool being able
to resize the DB device, I'm assuming that Nautilus is also capable
of migrating the DB/WAL between devices. That functionality would
allow anyone to migrate their DB back off of their spinner which is
what's happening to you. I don't believe that sort of tooling exists
yet, though, without compiling the Nautilus Beta tooling for yourself.
I think there you are wrong, initially bluestore tool can expand only
wal/db devices [1]. With last releases of mimic and luminous this
should work fine.
And only master received feature for main device expanding [2].
[1]
https://github.com/ceph/ceph/commit/2184e3077caa9de5f21cc901d26f6ecfb76de9e1
[2]
https://github.com/ceph/ceph/commit/d07c10dfc02e4cdeda288bf39b8060b10da5bbf9
k
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