Re: IOzone testing

[Jeff Layton <laytonjb-fOdFMYwuEsI@public.gmane.org>]

Jérôme Poulin wrote:
> On Sat, Sep 26, 2009 at 10:36 AM, Jeff Layton <laytonjb-fOdFMYwuEsI@public.gmane.org> wrote:
>   
>> Jérôme Poulin wrote:
>>
>> Cool program - I will definitely try this.
>>
>> So, let me summarize what I think I should do to test nilfs with
>> IOzone without the impact of the checkpoints and without filling
>> up the space.
>>
>> - Run IOzone without cleanerd running to minimize the
>> impact of checkpoints on IO performance.
>> - Assuming I don't fill up the file system, after a run of
>> IOzone, I need to run cleanerd but put the protection
>> period to something very small (e.g. 1 second) to reclaim the
>> space.
>> - Shut down cleanerd again and run another IOzone test.
>> (rinse and repeat)
>>
>> Does this sound about right?
>>
>> Thanks!
>>
>> Jeff
>>
>>     
> That sounds right, either run cleanerd or mkfs the partition again for
> faster results ;)
>   

Good point about using mkfs. :)

I think I'm going to run two test: (1) using the process above, (2) setting
the protection period to 1 (maybe 0). Let's see what the differences are.

Thanks!

Jeff