[Bugs] [Bug 1753843] [Disperse volume]: Regression in IO performance seen in sequential read for large file

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1753843



--- Comment #1 from Raghavendra G <rgowdapp at redhat.com> ---
Description of problem:
While running the perf test for large file regression seen in sequential read. 


=================================================================================================
Build           glusterfs-3.12.2-47     glusterfs-6.0-9         glusterfs-6.0-9
vs 
                (RHEL 7.7)                                     
glusterfs-3.12.2-47 (RHEL 7.7)
=================================================================================================
Seq write       3509108.198             3575702.62               1.90%
Seq read        2894066.582             2531160.094             -12.54% 
<<<<<<<<
Random read     107318.61               106771.402              -0.51%
Random write    551146.86               535243.422              -2.89%
=================================================================================================

Description of problem:
While running the perf test for large file regression seen in sequential read. 


=================================================================================================
Build           glusterfs-3.12.2-47     glusterfs-6.0-9         glusterfs-6.0-9
vs 
                (RHEL 7.7)                                     
glusterfs-3.12.2-47 (RHEL 7.7)
=================================================================================================
Seq write       3509108.198             3575702.62               1.90%
Seq read        2894066.582             2531160.094             -12.54% 
<<<<<<<<
Random read     107318.61               106771.402              -0.51%
Random write    551146.86               535243.422              -2.89%
=================================================================================================

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