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
--
To unsubscribe from this list: send the line "unsubscribe fio" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
