Flexible I/O Tester development
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From: Vladislav Bolkhovitin <vst@vlnb.net>
To: Jens Axboe <axboe@kernel.dk>, Andrey Kuzmin <andrey.v.kuzmin@gmail.com>
Cc: Jeff Furlong <jeff.furlong@hgst.com>,
	"fio@vger.kernel.org" <fio@vger.kernel.org>
Subject: Re: Specify range and distribution of accesses
Date: Fri, 11 Mar 2016 18:07:08 -0800	[thread overview]
Message-ID: <56E379CC.1010000@vlnb.net> (raw)
In-Reply-To: <20160303200446.GA2234@kernel.dk>

Jens Axboe wrote on 03/03/2016 12:04 PM:
> Here's a patch that attempts to provide that. Basically it's a new
> setting for random_distribution, zoned. With zoned, you can give
> percentages like your original example. So to do the zone layout that
> you provided:
> 
> 1) 50% of accesses to first 5% of user LBA space (LBA group a)
> 2) 30% of accesses to next 15% of user LBA space (LBA group b)
> 3) 20% of accesses to remainder of user LBA space (LBA group c)
> 
> you would do:
> 
> random_distribution=zoned:50/5:30/15:20/

What is random distribution inside each zone? "Random"?

Wouldn't it be better to make zoning distribution a separate parameter and keep
random_distribution to specify random distribution inside zones?

For instance, Gauss distribution inside zones would be more realistic approximation to
real life cases, where usually there are both spacial and temporal locality.

Thanks,
Vlad



  parent reply	other threads:[~2016-03-12  2:07 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-02-26 20:53 Specify range and distribution of accesses Jeff Furlong
2016-02-27  9:14 ` Andrey Kuzmin
2016-03-03 16:18   ` Jens Axboe
2016-03-03 20:04     ` Jens Axboe
2016-03-07 20:46       ` Jeff Furlong
2016-03-07 21:02         ` Andrey Kuzmin
2016-03-07 21:08           ` Jens Axboe
2016-03-08  2:41           ` Jens Axboe
2016-03-07 21:08         ` Jens Axboe
2016-03-07 21:19         ` Elliott, Robert (Persistent Memory)
2016-03-07 21:45           ` Jens Axboe
2016-03-12  2:07       ` Vladislav Bolkhovitin [this message]
2016-03-03 16:16 ` Jens Axboe

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