Open source

Red Hat turning VMworld into KVMworld?

VMworld 2009 is still two months away, but at least one virtualization competitor is already planning to steal some thunder at the show.

The Red Hat Enterprise Virtualization (RHEV) suite will hit general availability Sept. 1, according to LeMagIT — which, for those of you who don’t parlez francais, means “The IT Mag.” Sept. 1 is the first full day of VMworld 2009, when VMware typically makes most of its major announcements.

RHEV marks a shift from Xen to KVM as Red Hat’s open source virtualization technology of choice, as senior virtualization director Navin Thadani said on last week’s edition of This Week in Virtualization.

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Open source hypervisors face an uphill battle

VMware vs. Microsoft is the hot debate in virtualization these days, but what about proprietary vs. open source hypervisors?

Forrester Research has an interesting take on that topic. The firm’s new report, “Are Open Source Hypervisors Viable for You?” says the recession will drive more businesses to consider open source virtualization. I’m not sure I agree.

In most other technology markets, the “open source is free/cheap, and more people want free/cheap things when the economy is bad, so more people want open source” argument holds up. But to paraphrase Allen Iverson, we’re talking about virtualization! Not other markets. Not other markets. We’re talking about virtualization!

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EsXpress: A good idea come ’round again

I had the opportunity to spend a little time at the esXPress booth at VMworld 2008 this year, and I could kick myself. Hard.

To go to the start of why … a long time ago, back when my office primarily used VMware GSX3 for virtulization at the server level, I had a real need to do backups of the virtual machine disk files (VMDK). My GSX hosts were Linux servers and I used a simple cron job to launch scripts on a schedule, which triggered a suspension, tarring of the VMs and scp-ing of the tarballs to a network-attached storage (NAS) box before re-starting the guests. It let me avoid buying backup licenses for my guests (which were mostly pre-production units, image builds, etc.) and gave me a complete point-in-time recovery solution better than anything I could buy off the shelf (at the time). It ws so efficient that when my company joined the Core Customer Program, I was asked to give a webinar on the topic. Sadly, that webinar is now so out-of-date that it’s been pulled from VMware’s site and I can’t find it on archive.org.

Now why would I kick myself? Because that simple idea is at the root of esXpress. It does it a lot better than I did and focuses on ESX rather than GSX/Server, but at the core it’s very similar. It gets around the need for downtime and uses gzip under the hood rather than tar, but it has a Linux OS guest that essentially copies, compresses and offloads other guests. I was pretty impressed by how simply and efficiently the product works, though I must admit to being bit jealous — if only I had realized there was a <i>product</i> there in that idea.

So kudos to esXpress for taking a good idea and making a good product out of it!

Xen version 3.3 enhances performance, scalability to open source hypervisor

Xen.org announced the release of a new version of the project’s open source hypervisor, Xen 3.3 today, with enhancements to security, performance and scalability.

The release is now available for download from the Xen.org community site and is the product of a distributed development effort by senior engineers from more than 50 hardware, software, and security vendors.

The new Xen 3.3 release provides users with the new features including:

* Power management in the hypervisor
* Hardware Virtual Machine (HVM) emulation domains for better scalability, performance and security
* Shadow pagetable improvements for the best HVM performance ever
* Hardware Assisted Paging enhancements
* Device passthrough enhancements
* CPUID feature levelling that allows safe domain migration across systems with different CPU models (within the same vendor brand - Intel or AMD)

Xen 3.3 provides virtualization for x64, IA64 and ARM-based platforms, and through close links with CPU and chipset vendors in the Xen project, Xen 3.3 also supports the latest hardware virtualization enhancements, like Intel Virtualization Technology (Intel-VT).

With Xen’s memory ballooning feature, the hypervisor can reallocate memory between guest Virtual Machines (VMs) to guarantee performance and allow greater density of VMs per server. Xen 3.3 also offers CPU portability to allow live migration of VMs across different CPUs, active power optimization to reduce server power consumption, and significant security enhancements.

Simon Crosby, CTO, Virtualization and Management Division, Citrix Systems, said in a statement, “In just two years, Xen has rapidly gained share in virtualization, much as Linux did in operating systems - and in the same period Xen has driven the price of competing hypervisors to zero, allowing any vendor to include virtualization for free.”

In addition to its growing development community, Xen hypervisor is the standard virtualization platform used by cloud computing providers like Amazon.com. It is also used in virtualization products from Citrix (XenServer), Fujitsu, Novell, Oracle (Oracle VM), Sun Microsystems (Sun xVM), and Virtual Iron, and is available as an embedded option in many x86 servers.