From: Alireza Haghdoost <alireza@cs.umn.edu>
To: neto from Brazil <Antonio.Jose.Rodrigues.Neto@netapp.com>
Cc: "fio@vger.kernel.org" <fio@vger.kernel.org>
Subject: Re: FIO and replay_redirect
Date: Fri, 12 Feb 2016 11:00:51 -0600 [thread overview]
Message-ID: <CAB-428kPtVR5y3vgST_LkEqZKhdj5rYLAX72GK=+PfnoJzF=Ew@mail.gmail.com> (raw)
In-Reply-To: <D2DFB645.1D3AB%Antonio.Jose.Rodrigues.Neto@netapp.com>
Neto,
Once again, I would recommend you to use blkreplay instead of fio. You
can control the compressibility ratio in blkreplay using fill_random
parameter.
--Alireza
On Tue, Feb 9, 2016 at 2:29 PM, neto from Brazil
<Antonio.Jose.Rodrigues.Neto@netapp.com> wrote:
>
>>Hi All,
>>
>>This is neto from Brazil
>>
>>How are you?
>>
>>I have captured a blktrace from an Oracle workload. 18 dm devices.
>>
>>Steps to capture:
>>
>>blktrace <device 0> <device 1> ... -w 40
>>blkparse -i <device 0> -i <device 1> ... -o /dev/null -d oracle_trace.out
>>
>>Trying to replay with FIO (here I have 2 devices - /dev/sdh and /dev/sdi)
>>
>>Testing with one device:
>>
>>[workload]
>>ioengine=libaio
>>iodepth=1
>>size=100g
>>numjobs=1
>>direct=1
>>thread
>>read_iolog=/root/traces/oracle-s144/oracle_trace.out
>>replay_no_stall=1
>>replay_redirect=/dev/sdh
>>
>>[root@oraperf1 fio]# ./fio oracle-replay.cfg
>>workload: (g=0): rw=read, bs=4K-4K/4K-4K/4K-4K, ioengine=libaio, iodepth=1
>>fio-2.2.9-26-g669e
>>Starting 1 thread
>>fio: ioengines.c:422: td_io_open_file: Assertion `!fio_file_open(f)'
>>failed.
>>Aborted (core dumped)
>>
>>
>>
>>
>>
>>Questions:
>>
>>1) The workload that I capture, all DM devices have 200GB size. My devices
>>where I want to replay have 100GB. I believe I will need to match the size
>>of all disks (where I captured the workload) with the destination where I
>>am going to replay. For example: If I capture a workload with 18 LUNs
>>200GB, to replay I need to have 18 LUNs with 200GB minimum.
>>
>>2) I need to replay to more than one device. How can I do that with fio?
>>Seems to me replay_redirect is for a single specified device.
>>
>>3) Any help why I am getting that error? fio: ioengines.c:422:
>>td_io_open_file: Assertion `!fio_file_open(f)' failed.
>>
>>Thank you very much for all help.
>>
>>All the best
>>
>>Neto
>
>
> Hi All,
>
> This is neto from Brazil
>
> How are you?
>
> Any suggestions here?
>
> Thank you,
>
> neto
>
> --
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next prev parent reply other threads:[~2016-02-12 17:01 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-04 22:32 FIO and replay_redirect neto from Brazil
2016-02-04 23:11 ` Alireza Haghdoost
2016-02-04 23:17 ` neto from Brazil
2016-02-09 20:29 ` neto from Brazil
2016-02-12 17:00 ` Alireza Haghdoost [this message]
2017-07-31 6:17 ` Sitsofe Wheeler
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