Open source efforts to make it easier for companies to virtualize data center resources, whether they are Linux- or Windows-based, will be on full display this week at the LinuxWorld Conference and Expo in Boston.

Virtualization specialists XenSource and Virtual Iron, both rooted in Linux and open source, plan to use the show to announce support for Microsoft systems.

VMware, which created the market for virtualizing x86-based servers, plans to throw open the proprietary file format behind its virtual machines, making available to third-party developers and management software vendors the technology it uses to create software containers that include an operating system, applications and related data.

The idea is to create a standard, open platform for virtualizing x86-based servers so customers have more choices when it comes to deploying, managing and monitoring virtual resources. The move should help spur adoption of the nascent technology, industry observers say.

"With proprietary technology, people box themselves in," says Eric Bogatie, president and CTO of managed service provider NI Solutions in Ontario. "The adoption of Linux has been huge because of the open development community and the sharing of ideas and technologies. That's what I love about Virtual Iron's technology: they're working with other companies who say, 'Yes, we will support you guys and develop technology that will allow us to talk to your technology.'"

The focus is part of a larger shift in the industry as enterprises look beyond the basic Linux kernel. LinuxWorld, once the domain of the "sandal and ponytail set," will feature a new parallel conference called OpenSolutions World designed to give the growing number of business-focused attendees insight into open source technologies higher up the stack.

In addition, there will be a wider variety of sessions, including the first-ever track focused on mobile and embedded Linux, and a grid showcase.

Perhaps the strongest evidence that Linux is becoming mainstream and is being viewed as just another component of heterogeneous computing environments: For the first time Microsoft will give a LinuxWorld keynote. Bill Hilf, Microsoft's director of platform technology strategy, will talk about integrating open source and proprietary software.