Commits on Mar 22, 2021

1. 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.
   
   Fixes: https://tracker.ceph.com/issues/45265
   Signed-off-by: Josh Durgin <jdurgin@redhat.com>
   (cherry picked from commit c3e7acb)

   

   jdurgin authored and neha-ojha committed Mar 22, 2021
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