Xen users - Apr 2010 - XCP, creating a metric and looking for input

Greetings all:
    I''m sitting here on a Saturday night (life in the fast lane)
working
on putting together good blended host and virtual machine metrics for 
the upcoming load balancer so I thought I''d ask for some input from the
crowd :).

My experience is that, at least on my cloud, I''m far more likely to 
overload memory than CPU. In fact, as far as I can tell, I''ve never
been
able to even significantly load the CPUs on any of my (admittedly older) 
servers (2 are 2x Opteron, 2 are 2x dual core Opteron), even with a 
pretty hefty load of VMs running.

My question is, for those of you running as a real cloud (no funky 
specialized hardware passthroughs in the server, etc), have you ever 
been able to significantly load or overload your cpus before running out 
of memory? The reason for this question is that I''m establishing 
weighting for the relative importance of the components of the metric.

TIA!

Vern


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Hi Verne,

Am Samstag, den 10.04.2010, 20:56 -0400 schrieb Vern
Burke:
> Greetings all:
>     I''m sitting here on a Saturday night (life in the fast lane)
working
> on putting together good blended host and virtual machine metrics for 
> the upcoming load balancer so I thought I''d ask for some input
from the
> crowd :).
;-)
> 
> My experience is that, at least on my cloud, I''m far more likely
to
> overload memory than CPU. In fact, as far as I can tell, I''ve
never been
> able to even significantly load the CPUs on any of my (admittedly older) 
> servers (2 are 2x Opteron, 2 are 2x dual core Opteron), even with a 
> pretty hefty load of VMs running.
So you ever had supreme software :-)
> 
> My question is, for those of you running as a real cloud (no funky 
> specialized hardware passthroughs in the server, etc), have you ever 
> been able to significantly load or overload your cpus before running out 
> of memory?
Sure - every Software brings potential risk with it. Coding-Errors could
lead to such a behaviour.
>  The reason for this question is that I''m establishing 
> weighting for the relative importance of the components of the metric.
Sounds interesting. Is there any docs or whatever about your goals,
techniques and thoughts?

there a nice work: http://contentdm.lib.byu.edu/ETD/image/etd2755.pdf

some useful infos, can be found here, too: http://lbvm.sourceforge.net/
> 
> TIA!
> 
> Vern
> 
cu,

thomas

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> http://lists.xensource.com/xen-users


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