On 03/12/2015 08:32 AM, Urs Schaltegger wrote:
> fio always writes null bytes whatever I do. I need random data to avoid interference of deduplication solutions (within SSDs or using ZFS).
>
> Windows 8.1 Enterprise x64
>
> fio-2.2.6 (also tried 2.2.0/2.2.1/2.2.3)
>
> fio --section=fiorandom --runtime=60 <FIOFile>
>
> <FIOFile>:
>
> [global]
> ioengine=windowsaio
> thread
> group_reporting
> time_based
> clocksource=clock_gettime
> direct=1
> refill_buffers
> size=1g
> [fiorandom]
> readwrite=randwrite
> numjobs=4
> iodepth=1
> blocksize=8k
> directory=D\:\

Hmm yes, that looks like a regression. Does the attached work?


-- 
Jens Axboe