[Bugs] [Bug 1436739] New: Sharding: Fix a performance bug

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1436739

            Bug ID: 1436739
           Summary: Sharding: Fix a performance bug
           Product: GlusterFS
           Version: mainline
         Component: sharding
          Keywords: Triaged
          Assignee: kdhananj at redhat.com
          Reporter: kdhananj at redhat.com
        QA Contact: bugs at gluster.org
                CC: bugs at gluster.org



Description of problem:

As per Sanjay Rao's inputs, there was a performance drop in random reads fio
workload when run through vms hosted on sharded volumes.

Volume profile indicated a big difference between the number of lookups sent by
FUSE and number of lookups received by individual bricks.

Through code reading, it was found that there is a performance bug in shard
which was causing the translator to trigger unusually high number of lookups
for cache invalidation even when there was no modification to the file.


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


How reproducible:


Steps to Reproduce:
1.
2.
3.

Actual results:


Expected results:


Additional info:

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