[Date Prev][Date Next]   [Thread Prev][Thread Next]   [Thread Index] [Date Index] [Author Index]

Re: [Libvir] [RFC] Linux-VServer support



On Wed, Oct 31, 2007 at 01:36:48PM -0400, Daniel Veillard wrote:
> On Wed, Oct 31, 2007 at 05:14:10PM +0100, Daniel Hokka Zakrisson wrote:
> > Daniel Veillard wrote:
> > >Are the parameters for the scheduler all integers ? If you really
> > >never end up with an information set more structured than that then
> > >
> > >  <scheduler fill_rate1='100' interval1='1000' fill_rate2='25' 
> > >  interval2='1000'
> > >             idle_time='1'/>
> > >
> > >would probably be simpler. The question is would other kind of scheduler
> > >use more structured parameters ? Seems to me it's not the case and that
> > >ad-hoc parsing to convert {name, value} pairs would just work.
> > 
> > Actually, the same settings can be applied to the CPUs separately, e.g.
> > <scheduler>
> >   <param name='fill_rate1'>100</param>
> >   <param name='interval1'>1000</param>
> >   <cpu id='0'>
> >     <param name='idle_time'>1</param>
> >     <param name='fill_rate2'>25</param>
> >     <param name='interval2'>1000</param>
> >   </cpu>
> > </scheduler>
> > should at some point be possible (it's not in the current patch).
> 
>   Hum, I see, first time I see such fine grained scheduling, good to 
> know, thanks !
>   I still find that
> 
> <scheduler fill_rate1='100' interval1='1000'>
>   <cpu id='0' idle_time='1' fill_rate2='25' interval2='1000'/>
> </scheduler>
> 
> would be better than adding the arbitrary <param> element.

I don't think so - it makes it harder for an app to process, since they
need to know the nams of all the backend specific parameters in order
to extract the attribute. By having individual <params> you can easily
access them all with XPath - eg  /domain/schedular/param/@name  can
give you a list of all param names very nicely. it also maps to the 
virSchedInfo data struct nicely

Dan.
-- 
|=- Red Hat, Engineering, Emerging Technologies, Boston.  +1 978 392 2496 -=|
|=-           Perl modules: http://search.cpan.org/~danberr/              -=|
|=-               Projects: http://freshmeat.net/~danielpb/               -=|
|=-  GnuPG: 7D3B9505   F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505  -=| 


[Date Prev][Date Next]   [Thread Prev][Thread Next]   [Thread Index] [Date Index] [Author Index]