Comment 1 for bug 1371072

Reviewed: https://review.openstack.org/122208
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=3f4a0e40af7705b037db1a2ccc63de94547f6dd7
Submitter: Jenkins
Branch: master

commit 3f4a0e40af7705b037db1a2ccc63de94547f6dd7
Author: John Garbutt <email address hidden>
Date: Wed Sep 17 18:13:33 2014 +0100

    XenAPI: clean up old snapshots before create new

    Before taking a new snapshot, we now inspect the VDI chain to check for
    old snapshots.

    Those old snapshots can be left behind from resize, migrates, and
    snapshots that get interrupted if you kill the nova-compute process.

    If you leave these snapshots behind, the hypervisor disk will get too
    full, as VDI chains grow much bigger than you would expect. In addition
    snapshots start to grow in size, causing issues copying the snapshot
    into storage.

    Closes-Bug: #1371072

    Change-Id: Ice3741213438c7b4a7fda1e3e0a6dd7faca0fd04