Flexible I/O Tester development
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From: "Georg Schönberger" <gschoenberger@thomas-krenn.com>
To: Jens Axboe <axboe@kernel.dk>
Cc: fio@vger.kernel.org,
	Antonio Jose Rodrigues Neto
	<Antonio.Jose.Rodrigues.Neto@netapp.com>
Subject: Re: Group reporting with latency and IOPS
Date: Fri, 1 Feb 2013 07:35:55 +0100 (CET)	[thread overview]
Message-ID: <1591158599.146984.1359700554967.JavaMail.root@thomas-krenn.com> (raw)
In-Reply-To: <20130129130212.GB8800@kernel.dk>

> On Mon, Jan 28 2013, Neto, Antonio Jose Rodrigues wrote:
> > Hi All,
> > 
> > This is neto from Brazil
> > 
> > How are you?
> > 
> > I just need a help to make sure I understood correctly the report
> > (see below --Output).
> > 
> > Trying to generate 80% Read and 20% Write - 8KB block size
> > 
> > Reads
> > IOPS: 15330
> > Latency: (clat) 628usecs - 0.628ms
> 
> Correct. Well 629 really, if rounded properly.
> 
> > Writes
> > IOPS: 3827
> > Latency: (clat) 577usecs - 0.577ms
> 
> Correct too.
> 
> > Am I doing the correct analysis?
> 
> Yep.
> 
> > One question is: Is it possible to have global IOPS and latency?
> 
> You mean for both read and write combined? Fio does not report that,
> but
> for IOPS you could just add them. For latency, the larger of the two.
> 

Hi Jens,

you say here that the total Latency for a mixed workload is the larger of the two.
Why is it not the sum of the two i.e.
Total Latency Read + Total Latency Write ?

Best Regards, Georg

> --
> Jens Axboe


  parent reply	other threads:[~2013-02-01  6:35 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-01-28 23:32 Group reporting with latency and IOPS Neto, Antonio Jose Rodrigues
2013-01-29 13:02 ` Jens Axboe
2013-01-29 13:41   ` Neto, Antonio Jose Rodrigues
2013-01-29 13:46     ` Jens Axboe
2013-01-29 13:49       ` Neto, Antonio Jose Rodrigues
2013-01-29 13:54         ` Jens Axboe
2013-01-29 13:58           ` Neto, Antonio Jose Rodrigues
2013-01-29 20:10             ` Jens Axboe
2013-01-29 20:28               ` Neto, Antonio Jose Rodrigues
2013-01-29 20:32                 ` Jens Axboe
2013-01-29 20:40                   ` Neto, Antonio Jose Rodrigues
2013-01-29 21:16                     ` Jens Axboe
2013-01-30  3:54                   ` Neto, Antonio Jose Rodrigues
2013-01-30 11:08                     ` Jens Axboe
2013-02-01  6:35   ` Georg Schönberger [this message]
2013-02-01 10:13     ` Jens Axboe

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