[Bugs] [Bug 1297172] Client self-heals block the FOP that triggered the heals

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1297172



--- Comment #11 from Vijay Bellur <vbellur at redhat.com> ---
COMMIT: http://review.gluster.org/13207 committed in master by Pranith Kumar
Karampuri (pkarampu at redhat.com) 
------
commit 8210ca1a5c0e78e91c6fab7df7e002e39660b706
Author: Ravishankar N <ravishankar at redhat.com>
Date:   Sun Jan 10 09:19:34 2016 +0530

    afr: Add throttled background client-side heals

    If a heal is needed after inode refresh (lookup, read_txn), launch it in
    the background instead of blocking the fop (that triggered refresh) until
the
    heal happens.

    afr_replies_interpret() is modified such that the heal is
    launched only if atleast one sink brick is up.

    Max. no of heals that can happen in parallel is configurable via the
    'background-self-heal-count' volume option. Any number greater than that
    is put in a wait queue whose length is configurable via
    'heal-wait-queue-leng' volume option. If the wait queue is also full,
    further heals will be ignored.

    Default values:  background-self-heal-count=8, heal-wait-queue-leng=128

    Change-Id: I1d4a52814cdfd43d90591b6d2ad7b6219937ce70
    BUG: 1297172
    Signed-off-by: Ravishankar N <ravishankar at redhat.com>
    Reviewed-on: http://review.gluster.org/13207
    Smoke: Gluster Build System <jenkins at build.gluster.com>
    CentOS-regression: 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>
    NetBSD-regression: NetBSD Build System <jenkins at build.gluster.org>

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