Comment 9 for bug 1916843

Reviewed: https://review.opendev.org/c/openstack/cinder/+/784477
Committed: https://opendev.org/openstack/cinder/commit/e38fb71aac05a9ddc29670d4395c408d565f5d37
Submitter: "Zuul (22348)"
Branch: master

commit e38fb71aac05a9ddc29670d4395c408d565f5d37
Author: Hemna <email address hidden>
Date: Thu Apr 1 16:37:20 2021 -0400

    Rework backup process to make it async

    This patch updates the backup process to call the volume manager
    asynchronously to get the backup device in which to do the backup on.
    This fixes a major issue with certain cinder drivers that take a long
    time to create a temporary clone of the volume being backed up.

    Closes-Bug: #1916843
    Change-Id: Ib861e1bc35247f932fbae3796ed9025a560461c4