Re: Monitor IO while fio is running

[Alireza Haghdoost <alireza@cs.umn.edu>]

You should be able to redirect it to a file. Would you mind share with
us how you set the redirection?

On Mon, Mar 14, 2016 at 1:03 PM,  <Kurt_Dorsey@dell.com> wrote:
> Thank you Jeff for the reply.
>
> I have been playing around with this but unfortunately I cannot get the output to be outputted anywhere other than the screen / terminal.  I  have tried redirecting it to a txt file and parsing with with a python script but nothing ever gets output. (It only outputs to the screen)
>
> I haven't done C programming in years but I am trying to figure out from the code why this is.  I see in the eta.c file
>
> void display_thread_status(struct jobs_eta *je)
> {
> ...
>        printf("%s", output);
>
>         if (!eta_new_line_init) {
>                 fio_gettime(&disp_eta_new_line, NULL);
>                 eta_new_line_init = 1;
>         } else if (eta_new_line && mtime_since_now(&disp_eta_new_line) > eta_new_line) {
>                 fio_gettime(&disp_eta_new_line, NULL);
>                 eta_new_line_pending = 1;
>         }
>
>         fflush(stdout);
>
>
> It prints everything to the screen but I cannot redirect it at all
>
> Thoughts?
> Thank you,
> Kurt
>
>
> -----Original Message-----
> From: Jeff Furlong [mailto:jeff.furlong@hgst.com]
> Sent: Monday, March 14, 2016 12:56 PM
> To: Dorsey, Kurt ; fio@vger.kernel.org
> Subject: RE: Monitor IO while fio is running
>
> You might add --eta=always and --eta-newline=1 to get the current IOPs rate every 1s, printed to stdout. You can parse that current IOPs rate via a script and do something. I believe the IOPs rate is recalculated every 1s, not the average from beginning of test.
>
> Not sure why --eta and --eta-newline is not in the latest HOWTO notes.
>
> Regards,
> Jeff
>
> -----Original Message-----
> From: fio-owner@vger.kernel.org [mailto:fio-owner@vger.kernel.org] On Behalf Of Kurt_Dorsey@Dell.com
> Sent: Saturday, March 12, 2016 2:20 PM
> To: fio@vger.kernel.org
> Subject: Monitor IO while fio is running
>
> I may just not know how to do this
> I know about the ability to touch /tmp/fio-dump-status which will dump the output of fio to a file or stdout while the test is running. What I am looking for is to be able to dump the write_iops_log while fio is running so that I can see the point in time average IOps for a given interval For example if I have log_avg_msec=60000 it will write an iops.log file with 60second intervals, unfortunately this file doesn't get created until fio exits. Is there a way to get this to dump on a regular basis (or by touching a file in /tmp) so that I can tail the output?
>
> I am looking for a way to get point in time status via a script and the output from tmp-dump-status only gives me averages from the start of time rather than the last interval
>
> Thank you,
> Kurt
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