[Bugs] [Bug 1409191] Sequential and Random Writes are off target by 12% and 22% respectively on EC backed volumes over FUSE

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1409191

Ashish Pandey <aspandey at redhat.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
           Assignee|bugs at gluster.org            |aspandey at redhat.com
              Flags|needinfo?(aspandey at redhat.c |
                   |om)                         |



--- Comment #2 from Ashish Pandey <aspandey at redhat.com> ---
Description of problem:
------------------------

Testbed : 12*(4+2),6 servers,6 workload generating clients.

Benchmark : 3.1.3 with io-threads enabled.

3.2 testing was done with io-threads enabled and mdcache parameters set.

It looks like we have regressed with 3.2 on large file writes/rand writes :

******************
Sequential Writes
******************

3.1.3 : 2838601.16 kB/sec
3.2   : 2506687.55 kB/sec

Regression : ~ 12%


******************
Random Writes
******************

3.1.3 : 617384.17 kB/sec
3.2   : 480226.17 kB/sec

Regression : ~22%

Version-Release number of selected component (if applicable):
-------------------------------------------------------------

glusterfs-3.8.4-10.el7rhgs.x86_64


How reproducible:
------------------

100%

Actual results:
----------------

Regressions on sequential and random large file writes.

Expected results:
-----------------

Regression Threshold is within +-10%

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