Planet Hypervisor

Announcing the Xen Project 4.10 RC and Test Day Schedules

On Monday, we created Xen 4.10 RC1 and will release a new release candidate every MONDAY, until we declare a release candidate as the final candidate and cut the Xen 4.10 release. We will also hold a Test Day every WEDNESDAY for the release candidate that was released the week prior to the Test Day […]

A Brief Introduction to the Xen Project and Virtualization from Mohsen Mostafa Jokar

Mohsen Mostafa Jokar is a Linux administrator who works at the newspaper Hamshahri as a network and virtualization administrator. His interest in virtualization goes back to when he was at school and saw a Microsoft Virtual PC for the first time. He installed it on a PC with 256 MB of RAM and used it […]

Introduction to Saving VM Parameters: How I Metadata Backup

XenServer Virtual Machines (VMs) certainly need no introduction, but even if you do not pardon the pun above, they still contain a lot of specialized and individualized information about their sizes, network connections, and myriad other settings that are generally not readily exposed, yet are integral to the operation and functionality of each VM. This blog entry is not intended to take a deep dive into the several hundred parameters that are defined for VMs, but rather just talk a bit about how to save, extract and potentially restore VM information based on them. VM Metadata Backups The purpose of backing up...

XSO DB for XS 7.1 Closing Down

Attention XenServer community: Please be advised that, in alignment with our goal of frequent releases and the XSO database supporting one active release to help resolve issues found in that release while simultaneously preparing for the next release, we are closing down the XSO database for 7.1 issues. As such, users are encouraged to move to XS 7.2 and raise any issues they encounter with that release here. Users who wish to remain on the Long-Term Support Release (LTSR) stream are encouraged to visit As always, thank you for your support. Andy  

Citrix Announces First Cumulative Update for XenServer 7.1

Citrix has posted a blog announcing the availability of XenServer 7.1 CU1, the first cumulative update for the XenServer 7.1 Long-Term Support Release (LTSR). CU1 rolls-up all hotfixes released on XenServer 7.1 to date. While there are no new features introduced in this update, a number of additional fixes are included to further enhance and simplify XenApp and XenDesktop environments. Information pertaining to these fixes can be found in the release notes. Of particular significance, this cumulative update provides customers on Long-Term Support Release (LTSR) 7.1 with the latest platform fixes applicable to v7.1. Unlike Current Releases (CR), which provide access to new...

Changes to Hotfixes and Maintenance for XenServer Releases

XenServer (XS) is changing as a product with more aggressive release cycles as well as the recent introduction of both Current Release (CR) and Long Term Service Release (LTSR) options. Citrix recently announced changes to the way XenServer updates (hotfixes) will be regulated and this article summarizes the way these will be dealt with looking forward. To first define a few terms and clarify some points, the CR model is intended for those who always want to install the latest and greatest versions, and these are being targeted for roughly quarterly releases. The LTSR model is primarily intended for installations that...

Xen Project 4.8.2 is available

I am pleased to announce the release of Xen 4.8.2. Xen Project Maintenance releases are released in line with our Maintenance Release Policy. We recommend that all users of the 4.8 stable series update to the latest point release. The release is available from its git repository;a=shortlog;h=refs/heads/stable-4.8 (tag RELEASE-4.8.2) or from the XenProject download […]

My GSoC Experience: Allow Setting up Shared Memory Regions between VMs from xl Config File

This blog was written by Zhongze Liu. Zhongze Liu is a student studying information security in Huazhong University of Science and Technology in Wuhan, China. He recently took part in GSoC 2017 where he worked closely with the Xen Project community on “Allowing Sharing Memory Regions between VMs from xl Config.” His interests are low-level hacking and […]

My GSoC experience: Fuzzing the hypervisor

This blog post was written by Felix Schmoll, currently studying Mechanical Engineering at ETH Zurich. After obtaining a Bachelor in Computer Science from Jacobs University he spent the summer working on fuzzing the hypervisor as a Google Summer of Code student. His main interests in code are low-level endeavours and building scalable applications. Five months ago, […]

Mapping metod of solution on system of boolean equations tasks of type 23 && advanced Z(k) approach for tasks of type 18

Consider  following sample testing Demo of EGE 2016 Solution via building basic diagram and generated table via mapping has been setup Next sample ¬A => (Z(30) => ¬Z(20)) A + ( ¬Z(30) + ¬Z(20)) ¬(Z(30)Z(20)) +A (Z(30)Z(20)) => A 30 = 11110 v 20= 10100 —————— Result = 11110 =30 A(max) = 30