[CentOS] Xen stack scheme

Fri Mar 4 11:17:39 UTC 2011
Pasi Kärkkäinen <pasik at iki.fi>

On Fri, Mar 04, 2011 at 11:37:08AM +0200, Pasi Kärkkäinen wrote:
> On Fri, Mar 04, 2011 at 11:11:52AM +0200, Jussi Hirvi wrote:
> > On 4.3.2011 10.52, Simon Matter wrote:
> > > I don't know if it's recommended that way but at least it works fine.
> > 
> > Hm, that is kind of the only important thing. :-)
> > 
> > If it is not recommended, there have to be better reasons for that than 
> > mere tidiness.
> > 
> 
> Dom0 should be reserved only for management toolstack and minimal amount
> of services (storage/network backends).
> 
> Actually dom0 is a *VM* aswell (see "xm list"), although it has more direct
> access to the hardware and thus to storage. 
> 
> You're probably limited by the disk IOPS anyway, so it shouldn't
> matter that much if you run the service in dom0 or in domU,
> so go for domU, since that's the more safe bet.
> 

Oh, you should also limit and dedicate fixed amount of memory
for dom0, say, 768 MB, or whatever you need there.

http://wiki.xensource.com/xenwiki/XenBestPractices

-- Pasi