common/options: turn off bluestore_fsck_quick_fix_on_mount by default
This option enables 3 conversions:
1) pool stats, added in nautilus
2) per-pool omap, added in octopus
3) per-pg omap (replacing (2)) in pacific
Upgrading the long running cluster in sepia from octopus to pacific
resulted in conversion (3). This conversion isn't particularly useful
yet since the follow-on optimization of pg removal aren't in pacific
yet.
This took 25 minutes for the SSD-based osds with <10GB of omap. That's
a lot of disruption, and some clusters have 10x that much omap data.
Upgrades going from nautilus to pacific will miss the finer-grained
stats granularity, but isn't such an important feature it's worth
causing potential availability problems.
In the future we can orchestrate these format changes via cephadm/rook
to minimize the impact on the whole cluster, e.g. going an osd at a
time or doing it during an off-peak period, and not necessarily at the
same time as an upgrade.
projects / ceph.git / commit