[Bugs] [Bug 1215385] rmtab file is a bottleneck when lot of clients are accessing a volume through NFS

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1215385



--- Comment #3 from Anand Avati <aavati at redhat.com> ---
COMMIT: http://review.gluster.org/10379 committed in release-3.7 by Vijay
Bellur (vbellur at redhat.com) 
------
commit 40407afb529f6e5fa2f79e9778c2f527122d75eb
Author: Niels de Vos <ndevos at redhat.com>
Date:   Sun Apr 26 10:42:53 2015 +0200

    nfs: make it possible to disable nfs.mount-rmtab

    When there are many NFS-clients doing very often mount/unmount actions,
    the updating of the 'rmtab' can become a bottleneck and cause delays. In
    these situations, the output of 'showmount' may be less important than
    the responsiveness of the (un)mounting.

    By setting 'nfs.mount-rmtab' to the value "/-", the cache file is not
    updated anymore, and the entries are only kept in memory.

    Cherry picked from commit 331ef6e1a86bfc0a93f8a9dec6ad35c417873849:
    > BUG: 1169317
    > Change-Id: I40c4d8d754932f86fb2b1b2588843390464c773d
    > Reported-by: Cyril Peponnet <cyril at peponnet.fr>
    > Signed-off-by: Niels de Vos <ndevos at redhat.com>
    > Reviewed-on: http://review.gluster.org/9223
    > Tested-by: Gluster Build System <jenkins at build.gluster.com>
    > Reviewed-by: soumya k <skoduri at redhat.com>
    > Reviewed-by: jiffin tony Thottan <jthottan at redhat.com>
    > Reviewed-by: Kaleb KEITHLEY <kkeithle at redhat.com>

    This change also contains the fixes to the test-case from:
    >
    > nfs: fix spurious failure in bug-1166862.t
    >
    > In some environments, "showmount" could return an NFS-client that does
    > not start with "1". This would cause the test-case to fail. The check is
    > incorrect, the number of lines should get counted instead.
    >
    > Also moving the test-case to the .../nfs/... subdirectory.
    >
    > Cherry picked from commit ee9b35a780607daddc2832b9af5ed6bf414aebc0:
    > BUG: 1166862
    > Change-Id: Ic03aa8145ca57d78aea01564466e924b03bb302a
    > Signed-off-by: Niels de Vos <ndevos at redhat.com>
    > Reviewed-on: http://review.gluster.org/10419
    > Tested-by: Gluster Build System <jenkins at build.gluster.com>
    > Reviewed-by: Vijay Bellur <vbellur at redhat.com>
    >

    Change-Id: I40c4d8d754932f86fb2b1b2588843390464c773d
    BUG: 1215385
    Signed-off-by: Niels de Vos <ndevos at redhat.com>
    Reviewed-on: http://review.gluster.org/10379
    Tested-by: NetBSD Build System
    Tested-by: Gluster Build System <jenkins at build.gluster.com>
    Reviewed-by: Vijay Bellur <vbellur at redhat.com>

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