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1/9/2009
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Windows Server 2008 Getting Fault Tolerance Add-On

The availability of everRun as a feature of the operating system could allow Windows Server 2008 to host multiple virtual machines running mission-critical systems.

Fault tolerance will become an add-on feature of the Microsoft Windows Server 2008 operating system that can be switched on with little administrative training, according to spokesmen for Microsoft and Marathon Technologies, supplier of the everRun fault-tolerant system. It will become available in the second quarter.

For the highest level of availability, where users experience no interruption even though a component of the underlying system has failed, the price tag will be about $5,000. A lower level of availability, where the system recovers after a noticeable 20-second delay, will cost $2,000.

The move represents a lower level of skill needed for implementing fault tolerance, which was pioneered by Tandem Computers with its NonStop systems, still available through Hewlett-Packard. For many years, system fault tolerance that could survive the failure of any hardware or software component has been a highly engineered, high-expertise area of data center operation. It's often reserved for real-time trading systems and online banking transaction systems dealing with billions daily.

"Before, it was very complex to deploy and manage. It was mainly the top tier of computing that benefitted from fault tolerance," said Gary Phillips, president and CEO of Marathon, in an interview. Now a Windows Server administrator can activate the fault-tolerant feature without special training, after designating the level of availability sought.

In addition, Marathon's partnership with Microsoft will enable Microsoft to bring fault-tolerant operation to its Hyper-V virtual machines as well. No date has been specified other than in a "future version of Hyper-V," according to a Microsoft spokesman.

Windows Server 2008 users of either physical or virtual machines frequently want high-availability features or full system fault tolerance for their business workloads, especially Web-facing workloads, said Mike Schultz, Microsoft's director of product management for the Windows Server division, in a statement on the announcement.

The availability of everRun as a feature of the operating system could allow Windows Server 2008 to host multiple virtual machines running mission critical systems, while still keeping the risks inbounds.

Virtual machine users have been reluctant to stack up mission-critical systems, despite the pressure for server consolidation, because it puts "all the eggs in one basket," noted Phillips. If companies decide to do so, "this is where fault tolerance is no longer a luxury but a requirement," he said.

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