[Bugs] [Bug 1409191] Sequential and Random Writes are off target by 12% and 22% respectively on EC backed volumes over FUSE

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1409191



--- Comment #7 from Worker Ant <bugzilla-bot at gluster.org> ---
COMMIT: http://review.gluster.org/16377 committed in master by Pranith Kumar
Karampuri (pkarampu at redhat.com) 
------
commit 578e9b5b5b45245ed044bab066533411e2141db6
Author: Ashish Pandey <aspandey at redhat.com>
Date:   Wed Jan 11 17:19:30 2017 +0530

    cluster/ec: Do not start heal on good file while IO is going on

    Problem:
    Write on a file has been slowed down significantly after
    http://review.gluster.org/#/c/13733/

    RC : When update fop starts on a file, it sets dirty flag at
    the start and remove it at the end which make an index entry
    in indices/xattrop. During IO, SHD scans this and finds out
    an index and starts heal even if all the fragments are healthy
    and up tp date. This heal takes inodelk for different types of
    heal. If the IO is for long time this will happen in every 60 seconds.
    Due to this extra, unneccessary locking, IO gets slowed down.

    Solution:
    Before starting  any  type of heal check if file needs heal or not.

    Change-Id: Ib9519a43e7e4b2565d3f3153f9ca0fb92174fe51
    BUG: 1409191
    Signed-off-by: Ashish Pandey <aspandey at redhat.com>
    Reviewed-on: http://review.gluster.org/16377
    NetBSD-regression: NetBSD Build System <jenkins at build.gluster.org>
    CentOS-regression: Gluster Build System <jenkins at build.gluster.org>
    Smoke: Gluster Build System <jenkins at build.gluster.org>
    Reviewed-by: Pranith Kumar Karampuri <pkarampu at redhat.com>
    Reviewed-by: Xavier Hernandez <xhernandez at datalab.es>

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