Release: Xen Hypervisor version 4.2.0

Posted by virtualization.info Staff   |   Monday, September 17th, 2012   |  
Xen, just announced the release of Xen Hypervisor version 4.2.0
The first version of the product was developed by The University of Cambridge Computer Laboratory and it has been maintained as free software, licensed under the GNU General Public License (GPL). Xen is currently available for the IA-32, x86-64 and ARM computer architectures. It is used by many public cloud and hosting services.
Xen 4.2.0 is the result of 18 months of work on 300K lines of code of development effort, by 124 individuals from 43 organizations.
Among the new Features:
XL is now the default toolstack: Significant effort has gone in to the XL tool toolstack in this release and it is now feature complete and robust enough that we have made it the default. This toolstack can now replace xend in the majority of deployments, see XL vs Xend Feature Comparison. As well as improving XL the underlying libxl library has been significantly improved and supports the majority of the most common toolstack features. In addition the API has been declared stable which should make it even easier for external toolstack such as libvirt and XCP’s xapi to make full use of this functionality in the future.
Large Systems: Following on from the improvements made in 4.1 Xen now supports even larger systems, with up to 4095 host CPUs and up to 512 guest CPUs. In addition toolstack feature like the ability to automatically create a CPUPOOL per NUMA node and more intelligent placement of guest VCPUs on NUMA nodes have further improved the Xen experience on large systems. Other new features, such as multiple PCI segment support have also made a positive impact on such systems.
Improved security: The XSM/Flask subsystem has seen several enhancements, including improved support for disaggregated systems and a rewritten example policy which is clearer and simpler to modify to suit local requirements.
Documentation: The Xen documentation has been much improved, both the wiki. This is in no small part down to the success of the Xen Document Days so thanks to all who have taken part.


blog comments powered by Disqus


virtualization.info Newest articles
Amazon releases AWS plugin for Microsoft System Center Virtual Machine Manager

October 30th, 2014

Amazon has released the AWS System Manager for Microsoft System Center Virtual Machine Manager (SCVMM). AWS System Manager is an add-in for SCVMM which allows customers to monitor and manager…

Paper: Project VRC: Phase VII – Impact of Microsoft Application Virtualization (App-V) 5.0, Optimizations and Best Practices

October 29th, 2014

Project VRC, an ititiative started by LogIn Consultants and PQR, has released a new Project Virtual Reality Check (VRC) whitepaper titled:”Phase VII – Impact of Microsoft Application Virtualization (App-V) 5.0,…

Release: Update Rollup 4 for Microsoft System Center 2012 R2

October 28th, 2014

Microsoft has released Update Rollup (UR) 4 for its System Center Suite of products. The update rollup can be installed on top of System Center 2012 R2 products and is…

Microsoft announcements from TechEd Europe 2014

October 28th, 2014

This week Microsoft is holding its annual TechEd Europe conference in Barcelona Spain. During the keynote which was held today Microsoft made several announcements. This posts gives an overview of…

Zerto expands technology for use with Hyper-V

October 28th, 2014

Zerto, provider of Zerto Virtual Replication (ZVR) has announced that its product will also support the Hyper-V virtualization platform from Microsoft. Virtual Replication does per VM replication and recovery…

Paper: Windows Server Technical Preview Step-by-Step Guide Storage Quality of Service

October 28th, 2014

Microsoft has released a paper titled:”Windows Server Technical Preview Step-by-Step Guide: Storage Quality of Service“. The paper which contains 16 pages covers a new Windows Server technology which became available…

Paper: VMware vCloud Automation Center 6.1 – Reference Architecture

October 27th, 2014

VMware has released a paper titled: “VMware vCloud Automation Center 6.1 – Reference Architecture“.
The paper which contains 35 pages provide a reference architecture for setting up vCloud Automation Center…

Citrix results for Q3 2014

October 24th, 2014

On October 22, Citrix announced its financial results for the third quarter of fiscal year 2014, ended September 30, 2014.
The revenues for the third quarter were $759 million for…

VMware results for Q3 2014

October 24th, 2014

On October 21, VMware released the financial results for the third quarter of 2014.
The revenues for the third quarter were $1.53 billion for an increase of 18% compared to…

Paper: Reference Architecture – Director and EdgeSight

October 23rd, 2014

Citrix has released a paper titled: “Reference Architecture: Director and EdgeSight“. The paper which contains 32 pages contains a reference architecture for setting up Citrix Director and Citrix Edgesight.
Citrix…

Paper: Cisco UCS C240-M3 Rack Server with NVIDIA GRID GPU cards on Citrix XenServer 6.2 and XenDesktop 7.5

October 21st, 2014

Cisco has released a paper titled: “Cisco UCS C240-M3 Rack Server with NVIDIA GRID GPU cards on Citrix XenServer 6.2 and XenDesktop 7.5“.
The paper which contains 38 pages will…

Microsoft announces updates to its public and private cloud portfolio

October 20th, 2014

Microsoft today announced several upcoming features to both its public Microsoft Azure services, as its private cloud solution based on Windows Server and System Center. CEO Satya Nadella stated that…

OpenStack releases the 10th version of its IaaS platform called Juno

October 20th, 2014

OpenStack, the open source cloud computing project has released its 10th version of its IaaS platform for public, private and hybrid clouds. This version has 342 new features and…

VMware decides to disable TPS in future ESXi releases by default

October 17th, 2014

In a knowledge base article titled: “Security considerations and disallowing inter-Virtual Machine Transparent Page Sharing (2080735)” published on October 16th, VMware states that it will disable the Transparant Page Sharing…

 
Monthly Archive