Wednesday Apr 02, 2014

PVH - Best Characteristics of All Virtualization Modes

We all know that Oracle VM Server for x86 incorporates an open source Xen hypervisor component, which has been customized and optimized to integrate into the larger, Oracle-developed virtualization server. At the same time, Oracle is behind the Xen project and has made a variety of contributions. PVH is just one of the examples.

In the latest release of Xen 4.4, Oracle has contributed a functional preview of a new virtualization mode called PVH currently available to virtualized guests. PVH is an extension to the classic Xen Project Paravirtualization (PV) that uses the hardware virtualization extensions available on modern x86 processors. PVH uses PV drivers for boot and I/O, and Intel hardware virtualization extensions for page table operations, system calls and other privileged operations. This not only improves performance and security, but also simplifies the architecture and Xen Project Hypervisor-Linux interface significantly.

The feature was made possible thanks to Mukesh Rathor. He talked about his work at the Linux Collaboration Summit last week. For more technical details, you can read Konrad Wilk's blog entry at Xen.org: http://blog.xen.org/index.php/2014/01/31/linux-3-14-and-pvh/. You can learn more about Oracle's technical contributions to Linux and open source communities.

Note that this is about the upstream Xen development, so the feature is not immediately available in the current Oracle VM release. For What's New in the Oracle VM releases, visit here.

Friday Jun 08, 2012

Keep Oracle VM 3 Up to Date

Oracle VMMore and more customers turn to Oracle VM 3 to virtualize their enterprise applications. Oracle VM support subscription is an integrated part of their successes. Customers enjoy the benefit of the industry-leading global support 24x7 for their server virtualization implementation, and receive access to patches, fixes, and updates via Unbreakable Linux Network (ULN). For customers running Oracle systems, Oracle VM support is included in Oracle Premium Support for Systems at no extra cost, and customers receive comprehensive systems coverage that includes single point accountability for Oracle server and storage hardware; integrated software (for example, firmware); and operating system software (Oracle Solaris, Oracle Linux, and Oracle VM).

To run a successful virtualization infrastructure, it's important to keep Oracle VM 3 environment up to date by leveraging Oracle VM support resources. 

  • Oracle VM Server Updates: You can easily upgrade Oracle VM Server using a Yum repository. You can download the latest server patch updates from ULN. To receive notification on the software update delivered to Oracle ULN for Oracle VM, you can sign up here. For information on setting up an Oracle VM Server Yum repository and using Oracle VM Manager to perform the upgrade of Oracle VM Servers, see Updating and Upgrading Oracle VM Servers in the Oracle VM User's Guide
  • Oracle VM Manager Updates: Get the download instructions at OTN, and apply latest Oracle VM Manager patch. Be sure to review the patch README before you apply the patches.
  • Support customers have access to extremely valuable knowledge notes from My Oracle Support. They are the first to receive useful tips to help address issues in Oracle VM deployments. For example,
    • Upgrade to Oracle VM 3.1.1 using Yum Repository may cause network configuration scripts to be renamed causing network failure after reboot (Doc ID 1464126.1)
    • Oracle VM server reboots after network becomes unresponsive due to deep C-State power management setting (Doc ID 1440197.1)
For more information about Oracle's virtualization, visit oracle.com/virtualization.

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