Re: [Gluster-devel] Glusterd: A New Hope

[Anand Babu Periasamy]

On Sun, Mar 24, 2013 at 9:04 PM, Justin Clift <address@hidden> wrote:
> On 24/03/2013, at 8:55 AM, Stephan von Krawczynski wrote:
> <snip>
>> ... the most
>> important question: the performance tuning. We all know that glusterfs can be
>> unbelievably slow if you tuned the wrong switches. And really, finding the
>> right ones is very hard, even for very experienced administrators.
>> So instead of becoming "autonomous" (i.e. never be successful, I mean you 
>> just
>> said you cannot solve this by yourself and want to drop it on external
>> know-how) it would be a lot better to make some tuning-tool that analyses a
>> situation and gives hints how performance can be optimized - but not tuning 
>> it
>> by itself of course.
>
> Hmmm, some form of situational tuning sounds like an interesting idea.
>
> Any idea what kind of statistics/counters it would need to be aware of or
> somehow be able to measure?
>
> Regards and best wishes,
>
> Justin Clift
>
> --
> Open Source and Standards @ Red Hat
>
> twitter.com/realjustinclift
>

Simplest case is, we supply different profiles. Using gluster cli,
admin should be able to set these volume options by simply selecting a
profile as a volume property. We collaboratively collect these metrics
from Red Hat performance team and the community. To  begin with, this
can even be a shell script over gluster cli.

Ideally I would like to see a tool that generates load on a gluster
volume with various kinds of work loads (or user chosen one)
simultaneously trying out different volume options with a range of
known good values. In the end, it makes recommendations. With that we
should also have gluster save-profile and restore-profile commands.
Luckily, there are only few volume options that impact performance
significantly. So this is doable.

-ab
Imagination is more important than knowledge --Albert Einstein