VMware plans to improve virtual infrastructure through technologies such as high availability, automatic restart, better tolerance and masking of hardware failure, and site disaster recovery, said the company's chief scientist and co-founder, Mendel Rosenblum.

A virtual machine would, for example, be able to record its execution on another virtual machine in a compact form, so that if one of them dies the other one takes over, Rosenblum said. He did not disclose the time frame when products based on these technologies will be available.

Virtualisation would be more attractive if companies were pinched by a recession, said Diane Greene, VMware president and CEO. "People can do more with less, include perhaps postpone opening a new datacentre for three years, and do things more rapidly with fewer IT people," she added.

VMware, which had 88 percent revenue growth last year, expected 50 percent growth in revenue this year, after taking into account competition, a larger revenue base and the rate of adoption of its technologies, according to Greene. The competition was, however, far behind in virtualisation technologies, Rosenblum claimed.

VMware also announced that it plans to double its R&D staff in India to over 1,000 by 2010. The company is also investing $100 million during the period to expand its development team and its sales and marketing organisation in the country.

The company has development centres in Bangalore and Pune, though most of the development staff is currently in Bangalore.