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7.6. Creating a Data Center
There is a specific subscription available for data centers which registers a physical system as a hypervisor and then allows an unlimited number of virtual guests to be installed and registered on that system. That physical system can be a Red Hat Enterprise Linux system running RHEV or Xen, or it can be a non-Linux system, running VMware or HyperV. The configuration does not matter; as with running any virtualized environment, there simply must be one Red Hat Enterprise Linux system to run the
virt-who process to create the host/guest mapping.
For each physical host in the environment:
- Set up the host or hypervisor, as described in Section 7.3, “Setting up a RHEV (KVM) or Xen Hypervisor” or Section 7.4, “Setting up a VMware Hypervisor”.
- Attach the data center subsription to the hypervisor entry. The name of the subscription is Red Hat Enterprise Linux for Virtual Datacenters ... System:Physical.
- Register all guests for that host/hypervisor, as described in Section 7.4, “Setting up a VMware Hypervisor”.
Note
If a virtual instance is migrated from one hypervisor to another, the Red Hat Enterprise Linux subscription is preserved, but any subscriptions for additional products, such as JBoss Enterprise Application Platform, must be released and then re-attached.

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