Re: file_service_type and random_distribution

[Jens Axboe <axboe@kernel.dk>]

On 05/16/2016 12:11 PM, Jens Axboe wrote:
> On 05/16/2016 10:57 AM, Jens Axboe wrote:
>>> I would like to confirm those points is because i intend to run
>>> workload test that simulate hot file access. At any one time, the
>>> files open will be less than the total files in the system and there
>>> will be files that are hot and get access multiple times. Can i do it
>>> using fio? Thanks.
>>
>> That's a good question. Currently fio doesn't, but there's no reason why
>> it could not use the same distribution methods for choosing what files
>> to service. That would indeed allow you to mimic some files being hotter
>> than others, just like we do for offsets in that file.
>
> Something like the below patch would allow you to do that. Basically the
> options and values are idential to random_distribution, this one is just
> for selecting what file to service. Just like with random_distribution,
> you could use fio-genzipf to give you a good idea of what the
> distribution of file uses would be.
>
> Let me know how it works for you.

Committed with some fixes, so you can just use the git version.

-- 
Jens Axboe