[Bugs] [Bug 1477404] New: eager-lock should be off for cassandra to work at the moment

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1477404

            Bug ID: 1477404
           Summary: eager-lock should be off for cassandra to work at the
                    moment
           Product: GlusterFS
           Version: mainline
         Component: core
          Assignee: bugs at gluster.org
          Reporter: pkarampu at redhat.com
                CC: bugs at gluster.org



Description of problem:
    With the current implementation of eager-lock FINODELK is taking so much
    time that cassandra workload times out and errors out. AFR eager-locking
    needs to be changed similar to EC eager-locking to make things work
    as expected. In the interim, it is better to turn it off

    This is how the profile looks if eager-lock is turned on:
          0.35     628.26 us      64.00 us  129882.00 us          42278   
FXATTROP
         17.45   16500.54 us     212.00 us  375829.00 us          79568      
WRITE
         81.76  209862.12 us      15.00 us 1992486.00 us          29318   
FINODELK

    This is how profile looks if eager-lock is turned off:
          1.87     283.71 us      65.00 us  298970.00 us          68346   
FXATTROP
          6.33     199.04 us      13.00 us  373428.00 us         330524   
FINODELK
         10.37    3151.47 us      53.00 us 1528484.00 us          34172      
FSYNC
         81.31    5110.45 us     270.00 us 1519722.00 us         165244      
WRITE


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