[Bugs] [Bug 1242718] New: [RFE] Improve I/O latency during signing

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1242718

            Bug ID: 1242718
           Summary: [RFE] Improve I/O latency during signing
           Product: GlusterFS
           Version: 3.7.2
         Component: bitrot
          Assignee: bugs at gluster.org
          Reporter: vshankar at redhat.com
                CC: annair at redhat.com, bugs at gluster.org,
                    nsathyan at redhat.com, rabhat at redhat.com,
                    rmekala at redhat.com, vbellur at redhat.com
        Depends On: 1242317
      Docs Contact: bugs at gluster.org



+++ This bug was initially created as a clone of Bug #1242317 +++

This is an umbrella bug to track the ongoing effort of improving client I/O
latencies observed when objects are signed.

--- Additional comment from Anand Avati on 2015-07-12 23:19:56 EDT ---

REVIEW: http://review.gluster.org/11461 (features/bitrot: move inode state just
at the last moment) posted (#2) for review on master by Venky Shankar
(vshankar at redhat.com)

--- Additional comment from Anand Avati on 2015-07-12 23:20:03 EDT ---

REVIEW: http://review.gluster.org/11461 (features/bitrot: move inode state just
at the last moment) posted (#3) for review on master by Venky Shankar
(vshankar at redhat.com)

--- Additional comment from Venky Shankar on 2015-07-12 23:28:19 EDT ---

Not moving bug state as there would be multiple patches (first improvement
posted) to improve client I/O performance.

--- Additional comment from Anand Avati on 2015-07-13 05:14:21 EDT ---

COMMIT: http://review.gluster.org/11461 committed in master by Raghavendra Bhat
(raghavendra at redhat.com) 
------
commit 14e80e6e5d2d5d4fa568019fbe30cffa52714f87
Author: Venky Shankar <vshankar at redhat.com>
Date:   Tue Jun 30 13:10:46 2015 +0530

    features/bitrot: move inode state just at the last moment

    Which was done at half the set expiry time resulting in actual
    IOs incrementing the object version. Now this is done just at
    the last moment with re-notification now cut-shorting into
    checksum calculation without waiting in the timer-wheel.

    BUG: 1242317
    Change-Id: If655b77d822ebf7b2a4f65e1b5583dd3609306e7
    Signed-off-by: Venky Shankar <vshankar at redhat.com>
    Reviewed-on: http://review.gluster.org/11461
    Tested-by: NetBSD Build System <jenkins at build.gluster.org>
    Tested-by: Gluster Build System <jenkins at build.gluster.com>
    Reviewed-by: Raghavendra Bhat <raghavendra at redhat.com>

--- Additional comment from Venky Shankar on 2015-07-13 05:21:36 EDT ---

Let's keep this ASSIGNED as there would be other enhancements too (throttle
signer, etc.)


Referenced Bugs:

https://bugzilla.redhat.com/show_bug.cgi?id=1242317
[Bug 1242317] [RFE] Improve I/O latency during signing
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