Re: Repro blocks/offsets in multiple runs

[Vikram Seth <seth.vik@xxxxxxxxx>]

How do I specify a separate file for each job ?

I have following simple test file [ see numjobs=20]. Will the logging
work without corruption ?

[global]
description=Standard Performance test
runtime=30
direct=1
size=10g
filename=/root/fiotestfile
numjobs=20
group_reporting

[randwrite_256]
stonewall
rw=randwrite
bs=256k
write_iolog=fio_pattern

Vikram

On Fri, Mar 9, 2012 at 11:29 PM, Daniel Buggie <danielabuggie@xxxxxxxxx> wrote:
> I haven't tried them myself, but perhaps the write_iolog and
> read_iolog options would work for you in this case?
>
>  write_iolog=str
>              Write the issued I/O patterns to the specified file.
> Specify a separate file for each job, otherwise the iologs will be
> interspersed and the  file  may  be corrupt.
>
>       read_iolog=str
>              Replay the I/O patterns contained in the specified file
> generated by write_iolog, or may be a blktrace binary file.
>
> Daniel
>
> On Fri, Mar 9, 2012 at 2:23 PM, Vikram Seth <seth.vik@xxxxxxxxx> wrote:
>> Hi,
>>
>> I am looking for an option that enables fio to use same set of
>> blocks/offsets across multiple runs of the test.
>> This will be useful if I want am trying to fix a perf issue and want
>> to rerun the test to verify the patch. For such cases an exact repro
>> of the i/o pattern is important.
>>
>> Thanks,
>> Vikram.
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