On Sat, Mar 15, 2014 at 7:10 PM, jvogt <jvogt@xxxxxxx> wrote:
> Hi list
>
> I was wondering:
> When i start
> fio --name=/srv/mail/test --size=10M --direct=1 --runtime=60 --time_based
> --group_reporting --refill_buffer --rw=read --numjobs=1
>
> I get as result:
> read : io=1177.4MB, bw=20093KB/s, iops=5023, runt= 60000msec
>From fio/HOWTO:
time_based If set, fio will run for the duration of the runtime
specified even if the file(s) are completely read or
written. It will simply loop over the same workload
as many times as the runtime allows.
The same 10M file will be read many times(118), so most
of times it is read from page cache instead of the file, and
the result can't be accurate enough.
Thanks,
--
Ming Lei
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