[Bugs] [Bug 1314649] disperse: Provide an option to enable/disable eager lock

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1314649



--- Comment #5 from Vijay Bellur <vbellur at redhat.com> ---
COMMIT: http://review.gluster.org/13605 committed in master by Pranith Kumar
Karampuri (pkarampu at redhat.com) 
------
commit 23ccabbeb7879fd05f415690124bd7b4a74d4d33
Author: Ashish Pandey <aspandey at redhat.com>
Date:   Fri Mar 4 13:05:09 2016 +0530

    cluster/ec: Provide an option to enable/disable eager lock

    Problem: If a fop takes lock, and completes its operation,
    it waits for 1 second before releasing the lock. However,
    If ec find any lock contention within this time period,
    it release the lock immediately before time expires. As we
    take lock on first brick, for few operations, like read, it
    might happen that discovery of lock contention might take
    long time and can degrades the performance.

    Solution: Provide an option to enable/disable eager lock.
    If eager lock is disabled, lock will be released as soon
    as fop completes.

    gluster v set <VOLUME NAME> disperse.eager-lock on
    gluster v set <VOLUME NAME> disperse.eager-lock off

    Change-Id: I000985a787eba3c190fdcd5981dfbf04e64af166
    BUG: 1314649
    Signed-off-by: Ashish Pandey <aspandey at redhat.com>
    Reviewed-on: http://review.gluster.org/13605
    Smoke: Gluster Build System <jenkins at build.gluster.com>
    Reviewed-by: Pranith Kumar Karampuri <pkarampu at redhat.com>
    Tested-by: Pranith Kumar Karampuri <pkarampu at redhat.com>
    CentOS-regression: Gluster Build System <jenkins at build.gluster.com>
    NetBSD-regression: NetBSD Build System <jenkins at build.gluster.org>

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