[Bugs] [Bug 1394482] A hot tier brick becomes full, causing the entire volume to have issues and returns stale file handle and input /output error.

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1394482



--- Comment #2 from Worker Ant <bugzilla-bot at gluster.org> ---
COMMIT: http://review.gluster.org/15835 committed in release-3.9 by Dan
Lambright (dlambrig at redhat.com) 
------
commit 1001a4f7705f991f3ae1611997cf01b341ac453a
Author: Milind Changire <mchangir at redhat.com>
Date:   Sun Nov 13 10:52:03 2016 +0530

    cluster/tier: handle fast demotions

    Demote files on priority if hi-watermark has been breached and continue
    to demote until the watermark drops below hi-watermark.

    Monitor watermark more frequently.
    Trigger demotion as soon as hi-watermark is breached.
    Add cluster.tier-query-limit option to limit number
    of files returned from the database query for every iteration of
    tier_migrate_using_query_file(). If watermark hasn't dropped below
    hi-watermark during the first iteration, the next iteration will be
    triggered approximately 1 second after tier_demote() returns to the
    main tiering loop.
    Update changetimerecorder xlator to handle query for emergency demote
    mode.

    Add tier-ctr-interface.h:
    Move tier and ctr interface specific macros and struct definition from
    libglusterfs/src/gfdb/gfdb_data_store.h to new header
    libglusterfs/src/tier-ctr-interface.h

    > Reviewed-on: http://review.gluster.org/15158
    > Smoke: Gluster Build System <jenkins at build.gluster.org>
    > CentOS-regression: Gluster Build System <jenkins at build.gluster.org>
    > NetBSD-regression: NetBSD Build System <jenkins at build.gluster.org>
    > Reviewed-by: Dan Lambright <dlambrig at redhat.com>
    (cherry picked from commit 460016428cf27484c333227f534c2e2f73a37fb1)

    Change-Id: If56af78c6c81d37529b9b6e65ae606ba5c99a811
    BUG: 1394482
    Signed-off-by: Milind Changire <mchangir at redhat.com>
    Reviewed-on: http://review.gluster.org/15835
    Smoke: Gluster Build System <jenkins at build.gluster.org>
    NetBSD-regression: NetBSD Build System <jenkins at build.gluster.org>
    CentOS-regression: Gluster Build System <jenkins at build.gluster.org>
    Reviewed-by: Dan Lambright <dlambrig at redhat.com>

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