[Bugs] [Bug 1274101] need a way to pause/stop tiering to take snapshot

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1274101



--- Comment #2 from Vijay Bellur <vbellur at redhat.com> ---
COMMIT: http://review.gluster.org/12411 committed in release-3.7 by Dan
Lambright (dlambrig at redhat.com) 
------
commit e851ecbb12647f3e66f6d4c1ebdb0741eb3a3d2c
Author: Dan Lambright <dlambrig at redhat.com>
Date:   Mon Oct 5 19:52:02 2015 +0000

    cluster/tier: add pause tier for snapshots

    This is a backport of 12304

    Snaps of tiered volumes cannot handle files undergoing migration.
    We implement a helper mechanism to "pause" migration. Any files
    undergoing migration are aborted. Clean up is done to remove
    sticky bits and data at the destination. Migration is restarted
    after snap completes.

    For testing an internal switch is added. It is not exposed externally.

    gluster volume set vol1 tier-pause [true|false]

    > Change-Id: Ia85bbf89ac142e9b7e73fcbef98bb9da86097799
    > BUG: 1267950
    > Signed-off-by: Dan Lambright <dlambrig at redhat.com>
    > Reviewed-on: http://review.gluster.org/12304
    > Reviewed-by: N Balachandran <nbalacha at redhat.com>
    > Tested-by: NetBSD Build System <jenkins at build.gluster.org>
    > Tested-by: Gluster Build System <jenkins at build.gluster.com>
    Signed-off-by: Dan Lambright <dlambrig at redhat.com>

    Conflicts:
        xlators/mgmt/glusterd/src/glusterd-messages.h

    Change-Id: I5f039d8d38a4c915bd873969f336b96755a0b8f1
    BUG: 1274101
    Reviewed-on: http://review.gluster.org/12411
    Tested-by: NetBSD Build System <jenkins at build.gluster.org>
    Tested-by: Gluster Build System <jenkins at build.gluster.com>
    Reviewed-by: Dan Lambright <dlambrig at redhat.com>
    Tested-by: Dan Lambright <dlambrig at redhat.com>

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