Comment 7 for bug 1704106

Reviewed: https://review.openstack.org/541285
Committed: https://git.openstack.org/cgit/openstack/cinder/commit/?id=f33baccc3544cbda6cd5908328a56096046657ed
Submitter: Zuul
Branch: master

commit f33baccc3544cbda6cd5908328a56096046657ed
Author: Gorka Eguileor <email address hidden>
Date: Tue Feb 6 14:54:57 2018 +0100

    RBD: Don't query Ceph on stats for exclusive pools

    Collecting stats for provisioned_capacity_gb takes a long time since we
    have to query each individual image for the provisioned size. If we are
    using the pool just for Cinder and/or are willing to accept a potential
    deviation in Cinder stats we could just not retrieve this information
    and calculate this based on the DB information for the volumes.

    This patch adds configuration option `rbd_exclusive_cinder_pool` that
    allows us to disable the size collection and thus improve the stats
    reporting speed.

    Change-Id: I32c7746fa9149bce6cdec96ee9aa87b303de4271
    Closes-Bug: #1704106