Red Hat accuses Novell of being irresponsible about Xen

Quoting from the eWeek:

Red Hat Chief Technology Officer Brian Stevens has escalated to new heights the debate over whether the open-source Xen virtualization technology is ready for prime time, saying Novell was being irresponsible and risked damaging enterprises’ first experiences with Xen.

“What makes us most nervous is putting a bad taste in someone’s mouth around the Xen technology, which we think is business-transforming. We should not screw this thing up and put a cloud around Xen,”

For his part, Novell CTO Jeff Jaffe told eWEEK in an interview at the LinuxWorld Conference & Expo in San Francisco that the company had done an enormous amount of testing and firmly believed the Xen technology was ready.

“Could it be that Red Hat is embarrassed about the fact that they are six months late? This is the most transparent ploy and contradicts their own press release in March where they said Xen was ready. It’s totally a joke,” he said…

Read the whole article at source.

Virtual Machine Manager 2007 will support PowerShell since beta 2

Clive Watson, Architectural Product Technical Specialist at Microsoft, published a 6-parts walk thourgh for the just released System Center Virtual Machine Manager 2007 beta 1.

If you want a quick idea of the product without enrolling for the beta it’s a good method:

Clive also disclosee PowerShell will be fully supported within beta 2 of VMM2007.

Thanks to Thincomputing.net for the news.

Windows Server 2003 Service Pack 2 to boost performances on Windows Server Virtualization

From its corporate blog the Microsoft Windows Server Division leaks some details about ongoing Windows Server 2003 SP2 beta program and reveals:

Service Pack 2 improves the performance under high APIC access rate for Windows Server 2003 running as a multiprocessor guest operating system under Windows Virtualization.

Read the whole post at source.

The improvement depends on how Microsoft is now handling interrupts with Service Pack 2: they will be put on hold to collect as much as possible before asking hardware to serve them.
This way hypervisor will not have to do translations for every interrupt.

While Virtual Server 2005 will not receive any benefit from this change, performances improvement will appear when Windows Server 2003 SP2 will be used in the Windows Server Virtualization (WSV) as guest OS, or in any other virtualization platform supporting virtual SMP (including VMware products).

From server sprawl to virtual machines sprawl

SearchServerVirtualization published a very good article about the rising problem of virtual machines sprawl:


Hypothetically, a company that had 10 physical servers one year ago might have dropped that number down to eight with virtualization. But today, that company might now have 25 VMs running on those eight servers, Dugan said. The number of physical servers the company needs to manage has dropped by 20%, but the number of operating system instances has increased by 150%!

Engineers and users have gotten used to the ease with which they can deploy a virtual machine. Application users continually ask for their own server. With VMware, engineers can easily accommodate those requests. Savvy users realize how easy it is to get dedicated server space, so, he said, the number of VMs keeps increasing.

At this point, virtualization proponents don’t consider VM sprawl a huge problem. Despite the meteoric rise of virtualization in the data center, VMs still account for a very small percentage of total operating system instances in production today — between 1% and 2%, analysts estimate….

Read the whole article at source.

Virtual machines sprawl already is, in some virtualization early adopters environments, a significant problem. Will grow even further in the near term.

The changes Microsoft is introducing in its license model will remove the biggest obstacle from requesting a virtual machine for the smallest task.
Automation features VMware and Microsoft are introducing will further simplify the deployment, reducing the entity of the requested action.

Doing a parallel with security, superfluous virtual machines will plague host OS performances like superfluous rules plague firewalls performances.
At that point we”ll have same problems recognizing which virtual machine does what, who created it and if it is still necessary.

When times will be mature then VMware and other virtualization vendors will introduces a further step after automation: policy management.

Interview: LinuxInsider interviews Simon Crosby of XenSource

LinuxInsider published an interview with XenSouce CTO, Simon Crosby.

The interview has a couple of things that simply don’t work:

  • the claim to be an exclusive interview. That’s improbable since virtualization.info published an interview with Mr. Crosby just 2 weeks ago, about the much hyped Microsoft-Xensource agreement
  • an answer Mr. Crosby gave to interviewer:

    … Microsoft fully endorses our strategy, and will support Windows on XenEnterprise.

    That would be great but in the virtualization.info interview about the agreement Mike Neil, Microsoft Senior Director of Virtualization Strategy, Windows Server Division, clearly stated about this topic:

    … As I mentioned above, for customers with Premier-level support agreements, Microsoft will use commercially reasonable efforts to investigate potential issues with Microsoft software running in XenEnterprise or other non-Microsoft virtualization technology.

    which is pretty different than saying Microsoft will support Windows on XenEnterprise.

Read the whole interview at source.

VMware announces Ultimate Virtual Appliance Challenge winners

After more than 4 months of work, a lot of hype about the company and the new concept of virtual appliance, VMware can finally declare closed its Ultimate Challenge:

VMware, Inc., the global leader in software for industry–standard virtualized desktops and servers, today announced the winners of the Ultimate Virtual Appliance Challenge at LinuxWorld 2006. The Ultimate Virtual Appliance Challenge began February 27, 2006 and was designed to foster continued innovation in developing virtual appliances, which are pre-built, pre-configured and ready-to-run software applications packaged with the operating system into virtual machines….

The winners are:

1# ($100,000) HowNetWorks
The appliance features an Ubuntu distribution tailored around the open source network sniffer Ethereal (now Wireshark) and a special application, HowNetWorks, created for the challenge.

This application act as a analysis console of Ethereal collected traffic, simplifying some basic troubleshooting operations, like identifying so called top talkers (machines generating and receiving most traffic) or detailing most used protocols at a given time.
For most complex efforts it can invoke Ethereal itself feeding it packets you like to investigate.

HowNetWorks aims to provide few, neat capabilities with an easy interface, and it’s successful in the effort with its pretty effective sequencer.
The only concern is about buffer of packets which is limited to 300MB (oldest out approach): a selling point for the development team but a notable limitation for me.

2# (50,000) Trellis NAS Bridge Appliance
The appliance features a minimal Linux distribution, the winning PHP web interface launched by m0n0wall and subsequently adopted by other great liveCDs like pfSense and FreeNAS, and a Samba server.
The objective is easy: connecting remote disks on several storage servers reachable by different protocols and represent them in a consolidated way.

Trellis NAS Bridge Appliance it’s different from a traditional storage server because it only acts as a mapper for remote storage, not offering local or remote disks management capabilities.

It only support storage mapping and connection with SMB/CIFS and SSH but I hope the project will grow and implement iSCSI and Fibre Channel support as well.
I also hope to see a joint effort between this project, FreeNAS and OpenFiler to create a reliable liveCD solution able to act as storage server or storage brigde on demand.

Trellis NAS Bridge Appliance is a concrete example of storage virtualization over server virtualization. Pretty effective.

3# (25,000) Sieve Firewall
This submission is pretty original, featuring a Windows application which creates a minimal Linux liveCD distribution.
The resulting ISO has to be mapped on the virtual appliance CDRom, transforming it in a read-only, transparent firewall.

I’m much concerned about this third place assignment.

Sieve team did a great job developing a new product and are surely much more appreciated than many other submissions where you see usual software packed inside a virtual machine.

Sieve Firewall also has the big merit to have took the most from its virtual environment, cutting away all unneeded drivers but ones to drive virtual hardware and reaching a record size.
Anyway the solution has serious problems on several points:

  • While a read-only firewall could appear a great security solution, recreating the ISO and replacing it inside the virtual machine (which means you have to shut it down, creating disservice) every time you change a setting is simply unpractical.
  • Rules are created sequentially and there is no way to check them all together (like in any other firewall rulebase) and understand what you are doing, if and where are errors (putting a more permissive rule above a more restrictive one).
  • Rules are still defined with TCP/UDP ports, which implies a deep knowledge of security and applications behaviour.
    It’s also a reprecated approach in desktop firewalling since years: application proxy demostrated to be much more simple and effective to mitigate already installed malware.
  • The whole configuration with rules, pipes (to be intersected with rules for QoS), zones and blacklist (which are to be considered exceptions to allowing rules) requires notable knowledge.
  • The whole product is very raw and misses several basic and mandatory features, like network address traslation (NAT).

Nothing personal with Michael Jett and Kennieth Goodwin but in my opinion at the moment Sieve doesn’t reflect canons (which, at this point, I could have completely misunderstood) of simplicy and innovation this challenge aimed to enforce.

Check all other mentions here.

IBM plans to extend open source virtualization

Quoting from the IBM official announcement:

With the announcement, IBM unveiled eight key open source initiatives beyond Linux, aimed at accelerating the adoption of open standards and extending existing product lines to reach new customers. IBM also announced new work with the open source community to improve the development of general Linux kernel functionality, expanding its Linux focus around virtualization, Cell processor technologies, and security.

IBM technology experts are working on key components of open source virtualization software with focus in the areas of systems management, security, and POWER architecture enablement. The move builds upon IBM’s 40-plus years of virtualization experience on the mainframe. IBM recently contributed code from its IBM Director systems management product to the community for the management of virtual systems. IBM’s work is designed to help accelerate a common management module that spans across both the physical and virtual infrastructures…

SWsoft will extend Virtuozzo management to other virtualization tools

Quoting from the SWsoft official announcement:


All future releases of SWsoft’s Virtuozzo management tools will include support for other vendors’ virtualization solutions, including VMware virtual servers – giving data center managers unprecedented control of virtualized resources and enabling them to use various virtualization technologies without being tied to a single vendor’s management tools.

SWsoft will introduce its first wave of support of another technology later this year with VMware virtual machine management. Xen and other technologies will soon follow…

The announcement is clearly referring to Virtuozzo 4.0 which is expected later this year. Meanwhile you may want to check the virtualization.info review of SWsoft Virtuozzo for Windows 3.5.1.

AMD introduces virtualization in Opteron CPUs

Quoting from the AMD official announcement:

AMD today introduced its Next-Generation AMD Opteron processor family, featuring industry-leading performance-per-watt and outstanding virtualization capabilities.

The combination of AMD Virtualization? technology and Direct Connect Architecture provides a balanced approach to enhanced virtualization performance. AMD Virtualization is designed to extend AMD?s Direct Connect Architecture by providing additional silicon-based features to allow a hypervisor (the component in a native virtualization scenario that manages the partitioning of the processor) to easily support guest operating systems. The integrated DDR2 memory controller on Next-Generation AMD Opteron processors enhances virtualization and provides efficient isolation of virtual machine memory for improved security and support of virtual users. AMD Virtualization was developed in collaboration with AMD?s enterprise-focused OEM partners and ISVs currently shipping commercial virtualization software such as Microsoft, Novell, VMware and Xen…

While many waited for new AMD and Intel server processors, powered with virtualization enhancements, these features are no more so desirable after reading benchmark analysis VMware released about them.

Strangely VMware authors of the document claim CPU vendors developed these extensions in a too rigid way, vanishing performance improvements of software virtual machine monitors, while AMD says the technology has been developed in collaboration with virtualization players.

The virtualization.info Virtualization Industry Roadmap has been updated accordingly.