• kungfupandaThe Xen ProjectTM Powers

    the largest clouds in production

    The Xen ProjectTM is the leading open source virtualization platform that is powering some of the largest clouds in production today. Amazon Web Services, Rackspace Public Cloud, Verizon Cloud and many hosting services use Xen Project software.

  • panda2The XEN ProjectTM

    is the foundation for many products and platforms

    The Xen Project is 11 years old, mature and its stability is second to none:

    the Xen Project serves as the basis for many commercial server virtualization, desktop and embedded products as well as hardware appliances.

    Examples of server products include Huawei UVP, Oracle VM and XenServer. Examples of client solutions, appliances and embedded products include QubesOS, XenClient, Netscaler and GlobalLogic’s Nautilus Platform. Xen Project is also delivered as part of most Linux distributions as well as NetBSD.

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Latest Xen Project Blog Posts

Xen Project 4.5 Release Candidate 4 Test Day on December 17, 2014

Our Last Scheduled 4.5 Release Candidate Testing is on Wednesday The Test Day for 4.5 RC4 has been set for this Wednesday, December 17, 2014. Test Days insure that the upcoming release is ready for production. It also allows all users to test out the upcoming release in their own environment. This Test Day is […]

Xen Project Contributor Training

A few weeks ago, I went onto a road trip to China with the aim to meet Xen Project users as well as contributors. When I was planning the trip, it became apparent that many of the developers in China are new to the project and had difficulties with Xen Project governance and how the […]

4.5 RC3 Test Day on Thursday December 4, 2014

Our Next Round of 4.5 Release Candidate Testing is on Thursday The Test Day for 4.5 RC3 has been set for this Thursday, December 4, 2014. Test Days insure that the upcoming release is ready for production. It also allows power users to test out the upcoming release in their own environment. Subsequent Test Days […]

Latest Planet Blog Posts

XenServer Pre-Release Programme

A very big thank you for everyone who participated in the Creedence Alpha/Beta programme!  The programme was very successful and raised a total of 177 issues, of which 138 were resolved during the Alpha/Beta period.  We are reviewing how the pre-release process can be improved and streamlined going forward.  The Creedence Alpha/Beta programme has now come to an end with the focus of nightly snapshots moving on to the next version of XenServer.    The Creedence Alpha/Beta source code remains available and can be accessed here:  http://xenserver.org/component/content/article/24-product/creedence/143-xs-2014-development-snapshots.html Creedence Alpha/Beta bugs may still be reported on https://bugs.xenserver.orgWork is already progressing on the...

Average Queue Size and Storage IO Metrics

Introduction There seems to be a bit of confusion around the metric "average queue size". This is a metric reported by iostat as "avgqu-sz". The confusion seems to arise when iostat reports a different avgqu-sz in dom0 and in domU for a single Virtual Block Device (VBD), while other metrics such as Input/Output Operations Per Second (IOPS) and Throughput (often expressed in MB/s) are the same. This page will describe what all of this actually mean and how this should be interpreted. Background On any modern Operating System (OS), it is possible to concurrently submit several requests to a single storage device. This...