Red Hat releases Enterprise Virtualization Hypervisor and Virtualization Manager for Servers

REVH (Redhat Enterprises Virtualization Hypervisor) is a stripped down version of RHEL 5.4, with the following characteristics (partial list):

   Support for Intel VT / EPT and AMD-V / RVI

   Support for up to 64 physical CPUs (up to 256 core)

   Support for up to 1TB physical RAM

   Support for up to 16 vCPUs

   Support for up to 64GB vRAM

   Support for memory overcommit (page sharing only, depending on Linux Kernel Same-page Merging)

   Support for physical NICs bonding and multipath I/O

   Support for NFS, iSCSI and Fibre Channel

   Support for RHEL (from 3 to 5) and Windows (2003, 2008 and XP) guest operating systems. 

For Windows guests Red Hat offers paravirtualized (network and block) drivers based on the VirtIO standard, which are certified by Microsoft thanks to the SVVP certification.

Red Hat reports that KVM can handle up to 600 virtual machines within a single host.

 

REVMS supports the following capabilities:

   Virtual machines live migration (across NFS, iSCSI and FC shared storage)

   Virtual machines high availability.

   Virtual machines dynamic resource management.

   Hosts maintenance mode (when the host is put in maintenance REVMS uses live migration to move virtual machines elsewhere)

   Hosts power management (the System Scheduler can use live migration to relocate the VMs on low activity hosts and power down the unnecessary servers)

   Virtual machines thin provisioning (the REVMS component called Image Manager allows to over commit storage

   Virtual machines snapshots (snapshots can be scheduled and used as recovery points)

   Virtual machines templates

   Role based access control and support for Microsoft Active Directory for the management console

   APIs 

 

More details are available here:

http://www.virtualization.info/2009/11/red-hat-releases-enterprise.html