Date: Fri, 14 Nov 2008 08:18:40 +0900 (JST)
Message-Id: <20081114.081840.114538392.taka@valinux.co.jp>
To: psusi@cfl.rr.com
Cc: dm-devel@redhat.com, linux-kernel@vger.kernel.org,
       containers@lists.linux-foundation.org,
       virtualization@lists.linux-foundation.org,
       xen-devel@lists.xensource.com, fernando@oss.ntt.co.jp,
       balbir@linux.vnet.ibm.com, xemul@openvz.org,
       kamezawa.hiroyu@jp.fujitsu.com, agk@sourceware.org
Subject: Re: [dm-devel] [PATCH 1/8] dm-ioband: Introduction
From: Hirokazu Takahashi <taka@valinux.co.jp>
In-Reply-To: <491C81CB.7010705@cfl.rr.com>
References: <20081113.121019.104237699577193919.ryov@valinux.co.jp>
	<20081113.121146.623571555980959797.ryov@valinux.co.jp>
	<491C81CB.7010705@cfl.rr.com>
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Hi,

> Ryo Tsuruta wrote:
> > Create two ioband devices "ioband1" and "ioband2". "ioband1" is mapped
> > to "/dev/sda1" and has a weight of 40. "ioband2" is mapped to "/dev/sda2"
> > and has a weight of 10. "ioband1" can use 80% --- 40/(40+10)*100 ---
> > of the bandwidth of the physical disk "/dev/sda" while "ioband2" can use 20%.
> 
> Just to clarify, when you say ioband1 can use 80% of the bandwidh, you 
> mean that is how much it will get if both io bands are loaded right?  If 
> there is no activity on ioband2, then ioband1 will get the full disk 
> bandwidth right?

Absolutely, you are right!

Thank you,
Hirokazu Takahashi.
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