Re: Single process/thread that has multiple I/O patterns

From: Jens Axboe <>
Date: Mon, 26 Feb 2007 13:00:08 +0100

On Sun, Feb 25 2007, Roy Lee wrote:
> Hi,
> I was wondering if fio can add support for doing workloads that has
> finner granularity, for example, to simulate a single process/thread
> that has multiple different I/O patterns.
> It would be better if each I/O pattern can have it's own thinktime.
> [job1]
> rand_read_weight=1, 2-4ms
> seq_read_weight=5, 3ms
> seq_write_weight=5, 10ms

I would not be adverse to taking such a patch, if you feel like writing
it up. To avoid complicating/changing the option parser, you'd probably
want to do something ala:


to indicate a split option, similar to how bsrange is handled.

Jens Axboe
Received on Mon Feb 26 2007 - 13:00:08 CET

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