[Bugs] [Bug 1226005] should not spawn another migration daemon on graph switch

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1226005



--- Comment #9 from Anand Avati <aavati at redhat.com> ---
COMMIT: http://review.gluster.org/11372 committed in master by Dan Lambright
(dlambrig at redhat.com) 
------
commit 875aa01ec80e56d85d0bc6028c6f1417f6ab140f
Author: Dan Lambright <dlambrig at redhat.com>
Date:   Tue Jun 23 16:35:03 2015 -0400

    cluster/tier: stop tier migration after graph switch

    On a graph switch, a new xlator and private structures are
    created. The tier migration daemon must stop using the
    old xlator and private structures and begin using the
    new ones. Otherwise, when RPCs arrive (such as counter
    queries from glusterd), the new xlator will be consulted
    but it will not have up to date information. The fix
    detects a graph switch and exits the daemon in this
    case. Typical graph switches for the tier case would
    be turning off performance translators.

    Change-Id: Ibfbd4720dc82ea179b77c81b8f534abced21e3c8
    BUG: 1226005
    Signed-off-by: Dan Lambright <dlambrig at redhat.com>
    Reviewed-on: http://review.gluster.org/11372

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