monitoring kvm machines with libvirt

[Karsten Knese <Karsten.Knese@xxxxxxx>]

Hey folks.

Currently, i am working on my bachelorthesis. Subject of this thesis is 
to setup an accounting-solution for the Private Cloud with Eucalyptus. 
Eucalyptus works with libvirt providing kvm instances.

my question is, if i can grep facts like general uptimes, cpu-peaks and 
disk i/o of each vm with libvirt-tools?!
I just found one called virt-top, which monitors each vm, but 
unfortunately it produces to much overhead.
If you should be no tool, can anybody give me a hint, where i best look 
at to grep these facts?

First try is to grep the uptime of each vm by writing a little deamon, 
checking one time per minute via virsh, if the vm is in state running. 
But i don't know, if this is best.

thanks for your support!
cheers,
Karsten