WARNING - OLD ARCHIVES

This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
   
 
 
Xen 
 
Home Products Support Community News
 
   
 

xen-devel

[Xen-devel] Re: [dm-devel] [PATCH 1/8] dm-ioband: Introduction

Hi Phillip,

> > 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!

Here is a benchmark result of sharing bandwidth between three ioband
devices. When there is no activity on ioband2, the total bandwidth of
the disk is shared only between ioband1 and ioband3 according to their
weights.
http://people.valinux.co.jp/~ryov/dm-ioband/benchmark/partition1.html

--
Ryo Tsuruta <ryov@xxxxxxxxxxxxx>

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel