Re: Helping to model this workload

["Neto, Antonio Jose Rodrigues" <Antonio.Jose.Rodrigues.Neto@netapp.com>]

On 7/25/13 3:11 PM, "Jens Axboe" <axboe@kernel.dk> wrote:

>On 07/25/2013 01:07 PM, Neto, Antonio Jose Rodrigues wrote:
>> 
>> On 7/25/13 3:03 PM, "Jens Axboe" <axboe@kernel.dk> wrote:
>> 
>>> On 07/25/2013 01:02 PM, Neto, Antonio Jose Rodrigues wrote:
>>>> Just to confirm..
>>>>
>>>> bs_is_seq_rand=1
>>>>
>>>> bs=64k,4k 
>>>>
>>>> It's 64K for sequential and 4K for random
>>>>
>>>> Right?
>>>
>>> Correct. If bs_is_seq_rand is set, any READ block size setting is
>>> applied to sequential IO, and any WRITE block size setting is applied
>>>to
>>> random IO.
>>>
>>> -- 
>>> Jens Axboe
>>>
>> 
>> Let me see if I understood:
>> 
>> But Jens, if I want sequential read AND write 64KB and random read AND
>> write 4KB?
>
>Then you'd do:
>
>bs=64k,4k
>bs_is_seq_rand=1
>
>any ANY sequential IO will be 64kb, and ANY random IO will be 4kb.
>
>-- 
>Jens Axboe
>

This?

[workload]
bs=64k,4k

bs_is_seq_rand=1

ioengine=libaio
iodepth=2
numjobs=64
direct=1
runtime=2400
size=2000g
filename=\\.\PhysicalDrive9:\\.\PhysicalDrive10
rw=randrw
rwmixread=85
percentage_random=59,67
thread
unified_rw_reporting=1
group_reporting=1