We are pleased to introduce the public beta release of Citrix XenServer 4.1.
Citrix XenServer 4.1 is a service pack that enhances the previous v4 release.  New capabilities and improvements include:

  • Scalability and Performance
    • Twice the number of simultaneous running VMs
    • Rapid Virtualization Indexing (RVI – formerly nested page table, or NPT) support for modern AMD processors
    • VLAN support in Standard Edition
    • Improved Citrix Presentation Server performance and maximum number of user sessions
  • Reliability and Manageability
    • Host NIC bonding for fail-over (configured via CLI)
    • Centralized logging
    • Configuration of network management interfaces via the CLI
    • Update/patch management integrated in XenCenter
    • Java bindings for XenAPI in SDK
  • Storage
    • Shared Fibre Channel storage support (initialized via CLI)
    • Enhanced support for NetApp filers, including snapshot and cloning
    • Windows guest disk hot-remove
    • iSCSI improvements
    • Support for hot-plugging USB storage as a storage repository
  • Host System
    • Rolling pool upgrade support
    • NIC driver updates (e1000, BNX2, TG3)
    • Support several 10Gb network adapters (Mellanox/Chelsio)
    • Improved hardware support
  • Guest Support
    • Red Hat Enterprise Linux 5 32-bit and CentOS 5 32-bit install from physical CD
    • Red Hat Enterprise Linux 5 x64 and CentOS 5 x64 guest support
    • Oracle Enterprise Linux 5 x86 and x64 guest support
    • Windows Vista x86 guest support