Re: Helping to model this workload

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

>>>>>
>>>>>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


Jens

Would be nice if we could specify?
Iodepth for sequential and random
Numjobs for sequential and random (for example: I would like to have 16
jobs doing random and 1 job only doing sequential)

Thanks for considering it in the future

All the best my friend

neto