[Bugs] [Bug 1630798] New: Add performance options to virt profile

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1630798

            Bug ID: 1630798
           Summary: Add performance options to  virt profile
           Product: GlusterFS
           Version: mainline
         Component: glusterd
          Keywords: Triaged
          Severity: high
          Priority: medium
          Assignee: kdhananj at redhat.com
          Reporter: kdhananj at redhat.com
                CC: bugs at gluster.org, mpillai at redhat.com,
                    rhs-bugs at redhat.com, sabose at redhat.com,
                    sanandpa at redhat.com, sankarshan at redhat.com,
                    sasundar at redhat.com, sheggodu at redhat.com,
                    storage-qa-internal at redhat.com, vbellur at redhat.com
        Depends On: 1619627
            Blocks: 1599423



+++ This bug was initially created as a clone of Bug #1619627 +++

Description of problem:
------------------------
The option performance.client-io-threads, which has been unavailable as a
tuning option for replicated volumes in recent releases, is now available.
Gluster for vm storage use-case can benefit by adding it to the group virt
profile, along with a few others. The following is the list of suggested
additions to group virt:

performance.client-io-threads on
client.event-threads 4
server.event-threads 4

In addition, "cluster.choose-local false" is beneficial, and is already
covered.

In most random I/O tests on flash, the fuse thread is currently seen to be the
bottleneck. client-io-threads, along with the other options, helps push IOPS
far beyond what RHHI can currently provide.

--- Additional comment from Sahina Bose on 2018-09-19 02:59:52 EDT ---

Proposing this as per the latest perf analysis in Bug 1616270.


Referenced Bugs:

https://bugzilla.redhat.com/show_bug.cgi?id=1599423
[Bug 1599423] Add performance options to generated gdeploy config file
https://bugzilla.redhat.com/show_bug.cgi?id=1619627
[Bug 1619627] Add performance options to  virt profile
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