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* Make threads access the same files?
@ 2013-06-27 18:18 Andrew Davidoff
  2013-06-28 14:08 ` Jens Axboe
  0 siblings, 1 reply; 3+ messages in thread
From: Andrew Davidoff @ 2013-06-27 18:18 UTC (permalink / raw)
  To: fio

Hi,

If I understand fio's threaded operation, mrfiles are generated for
each thread (jobs=N), and each thread operates on its own files. Is
there a way to tell fio to spawn multiple threads, but for each to
access a single set of files?

So:

nrfiles=2048
jobs=12

Would produce 12 threads working against the same 2048 files.

Thanks.
Andy

^ permalink raw reply	[flat|nested] 3+ messages in thread
* Re: Make threads access the same files?
  2013-06-27 18:18 Make threads access the same files? Andrew Davidoff
@ 2013-06-28 14:08 ` Jens Axboe
  2013-06-28 20:41   ` Andrew Davidoff
  0 siblings, 1 reply; 3+ messages in thread
From: Jens Axboe @ 2013-06-28 14:08 UTC (permalink / raw)
  To: Andrew Davidoff; +Cc: fio

On Thu, Jun 27 2013, Andrew Davidoff wrote:
> Hi,
> 
> If I understand fio's threaded operation, mrfiles are generated for
> each thread (jobs=N), and each thread operates on its own files. Is
> there a way to tell fio to spawn multiple threads, but for each to
> access a single set of files?
> 
> So:
> 
> nrfiles=2048
> jobs=12
> 
> Would produce 12 threads working against the same 2048 files.

See the 'filename_format' option.

-- 
Jens Axboe


^ permalink raw reply	[flat|nested] 3+ messages in thread
* Re: Make threads access the same files?
  2013-06-28 14:08 ` Jens Axboe
@ 2013-06-28 20:41   ` Andrew Davidoff
  0 siblings, 0 replies; 3+ messages in thread
From: Andrew Davidoff @ 2013-06-28 20:41 UTC (permalink / raw)
  To: Jens Axboe; +Cc: fio

Thank you. Sorry I overlooked this. I do appreciate the detailed
documentation you provide!

Andy

On Fri, Jun 28, 2013 at 10:08 AM, Jens Axboe <axboe@kernel.dk> wrote:
> On Thu, Jun 27 2013, Andrew Davidoff wrote:
>> Hi,
>>
>> If I understand fio's threaded operation, mrfiles are generated for
>> each thread (jobs=N), and each thread operates on its own files. Is
>> there a way to tell fio to spawn multiple threads, but for each to
>> access a single set of files?
>>
>> So:
>>
>> nrfiles=2048
>> jobs=12
>>
>> Would produce 12 threads working against the same 2048 files.
>
> See the 'filename_format' option.
>
> --
> Jens Axboe
>


^ permalink raw reply	[flat|nested] 3+ messages in thread
end of thread, other threads:[~2013-06-28 20:41 UTC | newest]

Thread overview: 3+ messages (download: mbox.gz follow: Atom feed
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2013-06-27 18:18 Make threads access the same files? Andrew Davidoff
2013-06-28 14:08 ` Jens Axboe
2013-06-28 20:41   ` Andrew Davidoff

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