[Bugs] [Bug 1554743] New: [EC] Read performance of EC volume exported over gNFS is significantly lower than write performance

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1554743

            Bug ID: 1554743
           Summary: [EC] Read performance of EC volume exported over gNFS
                    is significantly lower than write performance
           Product: GlusterFS
           Version: mainline
         Component: disperse
          Assignee: bugs at gluster.org
          Reporter: aspandey at redhat.com
                CC: bugs at gluster.org



Description of problem:
Reads are only at 47MB/s while writes are at 219MB/s:



dd if=/dev/zero of=/media1/results/results/test-toberemoved/test.bin bs=1M
count=1000 conv=fdatasync
1000+0 records in
1000+0 records out
1048576000 bytes (1.0 GB) copied, 4.785 s, 219 MB/s

echo 3 > /proc/sys/vm/drop_caches

dd if=/media1/results/results/test-toberemoved/test.bin of=/dev/null bs=1M
count=1000
1000+0 records in
1000+0 records out
1048576000 bytes (1.0 GB) copied, 22.1433 s, 47.4 MB/s
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Version-Release number of selected component (if applicable):


How reproducible:


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