From: Jakob Oestergaard <jakob@unthought.net>
To: Jens Axboe <jens.axboe@oracle.com>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>,
Alan Cox <alan@lxorguk.ukuu.org.uk>,
Arjan van de Ven <arjan@infradead.org>,
"Phetteplace, Thad (GE Healthcare,
consultant)" <Thad.Phetteplace@ge.com>,
linux-kernel@vger.kernel.org
Subject: Re: Bandwidth Allocations under CFQ I/O Scheduler
Date: Wed, 18 Oct 2006 15:39:33 +0200 [thread overview]
Message-ID: <20061018133933.GA23492@unthought.net> (raw)
In-Reply-To: <20061018130456.GJ24452@kernel.dk>
On Wed, Oct 18, 2006 at 03:04:57PM +0200, Jens Axboe wrote:
...
> > So you could say you want your database to consume no more than 50%
> > of disk and have your mp3 player get a minimum of 10%. Of course,
> > that doesn't say anything about what the time slices are, or what
> > latencies you can expect (1s out of every 10, or 100ms out of every
> > 1000?).
>
> As I wrote previously, both a percentage and bandwidth along with
> desired latency make sense.
The fundamental problem I see, is, that while you can easily measure and
limit the bandwidth, you cannot really make bandwidth guarantees.
All the rest sounds great in my ears :)
--
/ jakob
next prev parent reply other threads:[~2006-10-18 13:39 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-10-16 20:46 Bandwidth Allocations under CFQ I/O Scheduler Phetteplace, Thad (GE Healthcare, consultant)
2006-10-17 1:24 ` Arjan van de Ven
2006-10-17 13:23 ` Jens Axboe
2006-10-17 14:37 ` Ric Wheeler
2006-10-17 14:47 ` Jens Axboe
2006-10-17 14:46 ` Phetteplace, Thad (GE Healthcare, consultant)
2006-10-18 8:00 ` Jakob Oestergaard
2006-10-18 9:40 ` Arjan van de Ven
2006-10-18 11:30 ` Jakob Oestergaard
2006-10-18 11:49 ` Jens Axboe
2006-10-18 12:23 ` Jakob Oestergaard
2006-10-18 12:42 ` Alan Cox
2006-10-18 12:44 ` Jens Axboe
2006-10-18 12:55 ` Nick Piggin
2006-10-18 13:04 ` Jens Axboe
2006-10-18 13:39 ` Jakob Oestergaard [this message]
2006-10-18 13:51 ` Paulo Marques
2006-10-19 12:22 ` Jens Axboe
2006-10-18 13:37 ` Jakob Oestergaard
2006-10-18 12:44 ` Jakob Oestergaard
2006-10-18 12:42 ` Jens Axboe
2006-10-18 13:35 ` Jakob Oestergaard
2006-10-18 9:51 ` Jens Axboe
2006-10-18 11:00 ` Helge Hafting
2006-10-18 11:14 ` Jens Axboe
2006-10-18 11:23 ` Ric Wheeler
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