On 12/03/2014 11:48 AM, Karthick Srinivasachary wrote:
> Hi Folks,
>
> I have question. Any feedback appreciated..!
>
> With buffer_compress_percentage, fio writes random data + zeros.
>
> Is there a way to write random data + repeat_pattern (instead of
> zero's). Pattern can be any user given pattern.

We can just make it fill with buffer_pattern instead of zeroing. Given 
that the pattern is short enough, it should not skew the compression 
rate significantly.

OK, did a quick patch and ran a quick test, looks like it's still within 
half a percent.

Pull the latest -git, then apply the attached patch. That should do what 
you want. Please report back.

-- 
Jens Axboe