Open Stack

Hello Stackers,
Any one using KVM as hypervisor in the production servers ? We are planning to use KVM as hypervisor in our production systems and we are planning to use 5 hypervisor nodes (~40 vms per hypervisor). 
How scalable is KVM when used with openstack ? Any limitations ?
Any ideas on handling HA (live migration) and Storage Motions ?
Is there a way I can restrict IOPS per VMs ?
Which Hypervisor is recommended to use with Openstack ?

Thanks in advanceMridhul 		 	   		  
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstack.org/pipermail/openstack/attachments/20140109/525f2243/attachment.html>