From: Jens Axboe <axboe@kernel.dk>
To: "Neto, Antonio Jose Rodrigues" <Antonio.Jose.Rodrigues.Neto@netapp.com>
Cc: "fio@vger.kernel.org" <fio@vger.kernel.org>
Subject: Re: Helping to model this workload
Date: Thu, 25 Jul 2013 13:11:05 -0600 [thread overview]
Message-ID: <51F17849.4060506@kernel.dk> (raw)
In-Reply-To: <CE16EF2F.12D53%Antonio.Jose.Rodrigues.Neto@netapp.com>
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
next prev parent reply other threads:[~2013-07-25 19:11 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CE142CC7.127F5%Antonio.Jose.Rodrigues.Neto@netapp.com>
2013-07-23 16:52 ` Helping to model this workload Neto, Antonio Jose Rodrigues
2013-07-25 16:45 ` Jens Axboe
2013-07-25 16:52 ` Neto, Antonio Jose Rodrigues
2013-07-25 18:27 ` Jens Axboe
2013-07-25 18:31 ` Neto, Antonio Jose Rodrigues
2013-07-25 18:42 ` Jens Axboe
2013-07-25 18:59 ` Neto, Antonio Jose Rodrigues
2013-07-25 19:02 ` Jens Axboe
2013-07-25 19:02 ` Neto, Antonio Jose Rodrigues
2013-07-25 19:03 ` Jens Axboe
2013-07-25 19:07 ` Neto, Antonio Jose Rodrigues
2013-07-25 19:11 ` Jens Axboe [this message]
2013-07-25 19:50 ` Neto, Antonio Jose Rodrigues
2013-07-26 14:22 ` Neto, Antonio Jose Rodrigues
2013-07-26 14:24 ` Jens Axboe
2013-07-26 14:28 ` Neto, Antonio Jose Rodrigues
2013-07-26 14:34 ` Jens Axboe
2013-07-26 14:35 ` Neto, Antonio Jose Rodrigues
2013-07-26 14:39 ` Neto, Antonio Jose Rodrigues
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