VMware's CEO made his pitch on Tuesday for a new type of operating system for the data center, and in the process assigned the "traditional OS" to the dustbin of history.

Speaking at the start of the VMworld conference in Las Vegas, CEO and President Paul Maritz described VMware's plans to offer a "virtual data center OS" for managing server applications more flexibly and efficiently.

The VDC OS is an attempt to extend the use of virtualization beyond the server, where it is widely used today, and apply the same principles to all the other hardware in a data center, including network switches and storage.

By creating this virtual environment, Maritz said, IT departments will be able to move application workloads to new hardware easily when extra capacity is needed, and set up new environments for running applications more quickly. It will create an "internal cloud computing environment" for the data center.

VMware announced the VDC OS on Monday, and Maritz's job Tuesday was to sell it to a cavernous hall packed with VMware customers. Most of the products that will make up the VDC OS don't exist today; VMware says it will roll out the new software throughout 2009, including products such as vNetworks and vStorage, for managing virtual pools of switches and storage equipment.

Maritz barely mentioned Microsoft in his hour-long speech, but his implication was that Microsoft, which is emerging as VMware's biggest competitive threat, will have no advantage from bundling its own Hyper-V virtualization software with its Windows OS.

"The traditional operating system has all but disappeared," Maritz said, making his first public speech since taking charge at VMware in July. It will be "deconstructed" and "reassembled" to make it more useful for data center environments.

Asked at a question-and-answer session later if VMware is building its own OS, Maritz replied, "Yes and no, it depends what you mean by an operating system."

"It is an operating system in the following sense," he said. "It abstracts away application loads from the underlying infrastructure, like traditional operating systems do, but the application loads it handles are different. This is drawing a line at a different point in the hierarchy."

"It has many parallels with an OS, in the sense that it has APIs and services," he said, "but it is not a traditional OS. What we expect is that people will increasingly use the services of the virtual data center OS to construct new types of application loads that will fulfill the capabilities that you see in traditional operating systems."

The IDG News Service is a Network World affiliate.