[Bugs] [Bug 1304287] New: Make the WRITE_IS_APPEND feature in AFR dynamically configurable for performance necessity

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1304287

            Bug ID: 1304287
           Summary: Make the WRITE_IS_APPEND feature in AFR dynamically
                    configurable for performance necessity
           Product: GlusterFS
           Version: mainline
         Component: replicate
          Assignee: bugs at gluster.org
          Reporter: li.ping288 at zte.com.cn
                CC: bugs at gluster.org



Description of problem:

    Problem:
    AS discussed at
    http://www.gluster.org/pipermail/gluster-devel/2016-January/047915.html

    The WRITE_IS_APPEND in afr_writev leads to locking for each file writing
operation
    in posix_writev in the server end.  This lock then impacts on the
concurrent ability
    of posix_writev to do final file writing and results in AFR writing
performance drop.

    Fix:
    Make the WRITE_IS_APPEND feature in AFR dynamically configurable.
    Enable or disable it under the necessity of performance.

-- 
You are receiving this mail because:
You are on the CC list for the bug.
You are the assignee for the bug.