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Articles for the keywords: xen
31 Mar 2014 The Software-Defined Data Center: Potential Game Changer [35692]
Network Computing, March 31st, 2014

"If I were to choose one technology breakthrough that completely revolutionized the way data centers are designed and managed, I'd choose server virtualization platforms like VMware, Hyper-V, Xen, and KVM. There are a number of reasons why server virtualization has been so beneficial, including hardware cost savings, decreased data center footprint, and eliminating vendor lock-in..."
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12 Feb 2014 Unbreakable Enterprise Kernel [34873]
Release 3 Quarterly Update 1

Michele Casey writes, "We are pleased to announce the availability of Unbreakable Enterprise Kernel Release 3 Quarterly Update 1 (UEK R3U1) for Oracle Linux 6. This is the first quarterly update release for UEK R3 (Version 3.8.13-26) and includes driver updates as well as a consolidation of fixes for bugs and security issues.

Some notable highlights include:

  • Xen improvements to the block and network frontend and backend architecture
  • Support for the crashkernel=auto kernel parameter to simplify Kdump configuration
  • New feature for enabling static probes in kernel modules with DTrace
  • Device driver updates (e.g. storage devices, network cards) from key partners, such as: Broadcom, Cisco, Emulex, HP, Intel, LSI, Mellanox, Qlogic

For more details, please review the release notes.

The source code is available on our public git repository....
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09 Jan 2014 Xen Mirage: The less-is-more cloud OS [34464]
InfoWorld, January 9th, 2014

"The less, the better. That's the philosophy underscoring Mirage, a new operating system created by the Xen Project, the same folks who gave us the Linux Xen hypervisor.

Originally discussed back in 2010, Mirage was developed to solve one specific problem and solve it well: to support the kinds of network application loads that run on cloud infrastructure. A 1.0 release of the OS emerged last December -- it's now up to 1.03, thanks to brisk user feedback -- and is ready for download, with binaries available for x86 and ARM processors..."
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28 Oct 2013 Fundamental Concepts for VLAN Networks [33468]
With Oracle VM Server for x86 by Gregory King and Don Smerker

Oracle VM Server for x86 supports a wide range of options in network design. This article discusses the basic concepts relevant to Oracle VM networking. Understanding these concepts will help you make informed design choices and enable you to build a scalable, robust network architecture that has high degree of channel separation.

This article focuses on understanding a complex Oracle VM network infrastructure that uses bonded interfaces with VLAN tags specifically for Oracle VM 3.1 and 3.2. (For information on other releases, see the release-specific documentation.) Topics include Xen domains, physical hardware choices including network bonding, logical Oracle VM networks and network channels, and VLAN segments and groups.
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26 Jun 2013 Linux-Containers - Part 1: Overview [31581]
Similar to Containers (or Zones) on Oracle Solaris or FreeBSD jails

Lenz Grimmer writes, "Linux Containers (LXC) provide a means to isolate individual services or applications as well as of a complete Linux operating system from other services running on the same host. To accomplish this, each container gets its own directory structure, network devices, IP addresses and process table. The processes running in other containers or the host system are not visible from inside a container. Additionally, Linux Containers allow for fine granular control of resources like RAM, CPU or disk I/O.

Generally speaking, Linux Containers use a completely different approach than "classicial" virtualization technologies like KVM or Xen (on which Oracle VM Server for x86 is based on). An application running inside a container will be executed directly on the operating system kernel of the host system, shielded from all other running processes in a sandbox-like environment. This allows a very direct and fair distribution of CPU and I/O-resources. Linux containers can offer the best possible performance and several possibilities for managing and sharing the resources available..."
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