Hi Jimmy, As you rightly pointed out, the OSD recovery priority does not work because of the change to mClock. By default, the "high_client_ops" profile is enabled and this optimizes client ops when compared to recovery ops. Recovery ops will take the longest time to complete with this profile and this is expected.
When you say "load avg on my servers is high", I am assuming it's the recovery load. If you want recovery ops to complete faster, then you can first try changing the mClock profile to the "balanced" profile on all OSDs and see if it improves the situation. The "high_recovery_ops" profile would be the next option as it will provide the best recovery performance. But with both the "balanced" and the "high_recovery_ops" profiles, improved recovery performance will be at the expense of client ops which will experience slightly higher latencies. For more details on the mClock profiles, see mClock Config Reference: https://docs.ceph.com/en/quincy/rados/configuration/mclock-config-ref/ To switch Profiles, see: https://docs.ceph.com/en/quincy/rados/configuration/mclock-config-ref/#steps-to-enable-mclock-profile The recommendation would be to change the profile on all OSDs to get the best performance for the operation you are interested in. -Sridhar _______________________________________________ ceph-users mailing list -- ceph-users@ceph.io To unsubscribe send an email to ceph-users-le...@ceph.io
