I believe it is used as a default setting for all clusters in the zone. But then you are still free to override that setting for specific clusters.
Salvatore > -----Original Message----- > From: Kevin Kluge [mailto:kevin.kl...@citrix.com] > Sent: 02 May 2012 14:06 > To: cloudstack-dev@incubator.apache.org > Subject: Add zone -- why hypervisor > > When you add a zone in 3.0.x there is a field for Hypervisor. Why is that?