Articles about hypervisor

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Linux Foundation backs new ‘ACRN’ hypervisor for embedded and IoT

UPDATED The Linux Foundation has announced a new hypervisor for use in embedded and internet of things scenarios. Project ACRN (pronounced “acorn”) will offer a “hypervisor, and its device model complete with rich I/O mediators.” There’ll also be “a Linux-based Service OS” and the ability to “run guest operating systems (another …
Simon Sharwood, 19 Mar 2018
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Xen Project says new version 4.10 has found balance between security and novelty

The Xen Project has released version 4.10 of its hypervisor. Maintainer boss Julien Grail wrote that "As in Xen 4.9, we took a security-first approach for Xen 4.10 and spent a lot of energy to improve code quality and harden security." "This inevitably slowed down the acceptance of new features somewhat and also delayed the …
Simon Sharwood, 15 Dec 2017
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Xen Project's plan after AWS goes KVM: Talk up embedded future

Update Fresh from the news that Amazon Web Services intends to replace its hypervisor, the Xen Project will tell the world it has a fine future in embedded applications. Publicly-posted minutes of the Project's November Advisory Board call mentioned The Register's report of Amazon Web Services documents that revealed the cloud …
Simon Sharwood, 22 Nov 2017
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QEMU qontemplates qleanup of old qode

Open source hypervisor QEMU is contemplating a code cleanup. The project's developers have recently pointed out that “The deprecation of features in QEMU is totally adhoc currently, with no way for the user to get a list of what is deprecated in each release.” The project therefore made an effort to properly document …
Simon Sharwood, 11 Aug 2017
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Release the hounds! Xen 4.9's first RC is out and wants testing

The Xen Project's wheeled out the first release candidate of Xen 4.9 and reckons it will be ready to launch in the first week of June 2017. Release candidate 1 of the new version emerged last Thursday and the release schedule calls for successors to follow on April 21st, April 28th, May 5th and May 12th. Test days for each …
Simon Sharwood, 19 Apr 2017
Bitdefender and Citrix's hypervisor introspection in action

Citrix, Bitdefender in Xen-only virtual security double-team

Citrix and Bitdefender have revealed a security tool that runs inside the hypervisor – in this case, Citrix's own XenServer – to detect advanced persistent threats running in guest VMs. The tool pulls off this trick by inspecting the state of memory used by guest VMs. If the “Hypervisor Introspection” (HVI) tool sees telltale …
Simon Sharwood, 10 Feb 2017

Explo-Xen! Bunker buster bug breaks out guests from hypervisor

Code dive A super-bug in the Xen hypervisor may allow privileged code running in guests to escape to the underlying host. This means, on vulnerable systems, malicious administrators within virtual machines can potentially break out of their confines and start interfering with the host server and other guests. This could be really bad …
Chris Williams, 27 Jul 2016

Patch this braXen bug: Hypervisor hole lets guest VMs hijack hosts

The Xen hypervisor project today released nine security patches that should be applied ASAP – particularly the one that stops guest virtual machines seizing control of host servers. That vulnerability – XSA-148 – can be exploited by a paravirtualized guest to manipulate the memory layout of the underlying system, and …
Chris Williams, 29 Oct 2015
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Devote Thursday to Xen and the art of hypervisor maintenance

The Xen Project will release nine patches on Thursday. The Project gives each bug an “XSA” number and the 29th of October will see XSA 145 through 153 debut. The patch run looks to be a tricky one, because the Project added XSA 143 and 144 to the list, but now lists them as unassigned. If you take a look at the outfit's vuln …
Simon Sharwood, 27 Oct 2015
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By the numbers: The virtualisation options for private cloud hopefuls

VMware, Hyper-V ... XenServer? When it comes to virtualisation, these are the three most frequently cited options. And this would have been OK in the days before cloud, when virtualisation was “just” something for the boys and girls down in the sysadmin branch of the IT department cared about. Now we do have cloud, and private …
Tom Baines, 5 Oct 2015
Angry-looking cat. Pic by  Guyon Morée from Beverwijk, Netherlands. licensed under the Creative Commons Attribution 2.0 Generic license

Now listen, Gartner – virtualisation and containers ARE different

Comment Gartner recently released its Magic Quadrant for x86 Server Virtualisation Infrastructure. In it, the mega analyst lumps together hypervisor-based virtualisation and containers. This is wrong, and as I've discussed before virtualisation and containerisation are different. Even if you consider all the differentiators in the …
Trevor Pott, 29 Jul 2015

Cloudy VMs leak ID details that could allow attacks, says researcher

Research published by a US masters student reaches the somewhat unsettling conclusion that current cloud technologies don't separate virtual machines (VMs) as well as they could. By spying on shared resources at a low level, the research suggests, an attacker's VM can retrieve data written by another (like crypto keys), and …
Young hipster man wearing hat, suspenders, bow-tie and fake-looking tattoo-sleeve. Image via shutterstock

Hypervisor indecisive? Today's contenders from yesterday's Hipsters

The origins of the hypervisor can be traced back to IBM’s mainframe systems. Big Blue implemented something approximating a virtualisation platform as an experimental system in the mid-sixties but it wasn’t until 1985 that the idea of the logical partition (or LPAR) on the pSeries and zSeries delivered something recognisable as …
Tom Baines, 12 May 2015

The VMware, Nutanix mud wrestle is hilarious, but which one is crying with fear on the inside?

Sysadmin blog So Nutanix is in yet another spat with VMware. The big ones are getting to be a yearly affair. That's great for them: these little soap operas seem amusing, but underneath it all, there are some very serious issues being hashed out. VMware wants control of our data centers. The whole stack, top to bottom. It wants to be the …
Trevor Pott, 8 Apr 2015

Nutanix 'working on a homebrew hypervisor', sources tell El Reg

We're not quite sure why Nutanix would be working on its own hypervisor, but apparently it is, The Register has learned. Sources on both sides of the Atlantic tell us development work on the hypervisor has reached an advanced state. The startup, based in San Jose, California, expects to talk about its efforts at its user …
Simon Sharwood, 23 Mar 2015
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Part 3: Docker vs hypervisor in tech tussle SMACKDOWN

Comment If you're willing to start from scratch, give up high availability, the ability to run multiple operating systems on a single server and all the other tradeoffs then Docker really can't be beaten. You are going to cram more workloads into a given piece of hardware with Docker than with a hypervisor, full stop. From the …
Trevor Pott, 2 Dec 2014
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NIST to hypervisor admins: Pro-tip, secure your systems

US standards body the National Institute of Standards and Technology (NIST) has laid out the basics of hypervisor security in a draft publication released for comment on 20 October. The sysadmin guide presents 22 security recommendations, under the key headings of isolating VMs from each other and the host hypervisor; …
Samsung 60nm 1Gb DDR 2 DRAM chip and DIMM

DRAM! Speedy software upstart PernixData's caching up fast

VMware IO cacher PernixData has upped the quick access ante by caching virtual machine disk IO in DRAM — much faster for data access than flash. The startup’s FVP software runs in the ESXi hypervisor, and it's also added user-defined fault domains and adaptive network compression to its clustering technology. FVP accelerates …
Chris Mellor, 2 Oct 2014

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