[Bugs] [Bug 1312721] tar complains: <fileName>: file changed as we read it

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1312721



--- Comment #23 from Vijay Bellur <vbellur at redhat.com> ---
COMMIT: http://review.gluster.org/14454 committed in release-3.7 by Pranith
Kumar Karampuri (pkarampu at redhat.com) 
------
commit 0c2fb5d80e248f8b49e0ed13de0165c30429a072
Author: Pranith Kumar K <pkarampu at redhat.com>
Date:   Sat Mar 19 11:40:26 2016 +0530

    cluster/afr: Don't let NFS cache stat after writes.

    Problem:
    Afr does post-ops after write but the stat buffer it unwinds is at the
    time of write, so if nfs client caches this, it will see different
    ctime when it does stat on it after post-op is done. From NFS client's
    perspective it thinks the file is changed. Tar which depends on this
    to be correct keeps giving 'file changed as we read it' warning.
    If Afr instead has to choose to unwind after post-op, eager-lock,
    delayed-post-op will have to be disabled which will lead to bad
    performance for all write usecases.

    Fix:
    Don't let client cache stat after write.

     >Change-Id: Ic6062acc6e5cdd97a9c83c56bd529ec83cee8a23
     >BUG: 1302948
     >Signed-off-by: Pranith Kumar K <pkarampu at redhat.com>
     >Signed-off-by: Anuradha Talur <atalur at redhat.com>
     >Reviewed-on: http://review.gluster.org/13785
     >Smoke: Gluster Build System <jenkins at build.gluster.com>
     >NetBSD-regression: NetBSD Build System <jenkins at build.gluster.org>
     >CentOS-regression: Gluster Build System <jenkins at build.gluster.com>
     >Reviewed-by: Niels de Vos <ndevos at redhat.com>

    BUG: 1312721
    Change-Id: I42a5d524bcf2a2034fe48ee8454812ca26a98c37
    Signed-off-by: Pranith Kumar K <pkarampu at redhat.com>
    Reviewed-on: http://review.gluster.org/14454
    NetBSD-regression: NetBSD Build System <jenkins at build.gluster.org>
    CentOS-regression: Gluster Build System <jenkins at build.gluster.com>
    Smoke: Gluster Build System <jenkins at build.gluster.com>

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