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

[bugzilla at redhat.com]

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

Atin Mukherjee <amukherj at redhat.com> changed:

           What    |Removed                     |Added
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                 CC|                            |amukherj at redhat.com



--- Comment #2 from Atin Mukherjee <amukherj at redhat.com> ---
(In reply to Krutika Dhananjay from comment #0)
> +++ 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.

A summary of the % of performance gain by the tuning change would be ideal
here.

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