Is Server Virtualization The New Clustering?

Disaster Recovery Replacements

There are actually two different ways to provide this new form of clustering. The first leverages the ability to move virtual machines across the Internet, so you can quickly get a secondary site up and running when the primary server has failed. "We have seen disaster recovery protection now available to a whole class of customers that couldn't do it before,” says Bob Williamson, an executive VP with Steeleye Technology Inc., a specialized virtualization vendor. ”In the past, you needed to buy another physical server and have it ready if the primary machine went down. But by using virtualization and hosting these servers at a remote location, enterprises can use these machines if their datacenter goes out. That lowers the entry cost for deploying wider-area disaster recovery, and opens up this protection to a whole new set of companies that haven't been able to consider it before.”

With Virsto, you can see exactly how large your VM is, and how much disk storage you are consuming at any given time by comparing the "Size" and "Size on Disk" columns.

Other vendors, such as Novell, have stepped into this arena with their tools to help automate the provisioning of new virtual machines and make DR easier. Novell's Cloud Manager, for example, has automated, template-based provisioning processes that allow users to request, approve, and deploy new workloads using a single Web-based portal. And its Forge appliance makes it easier to rapidly recover workloads with one-click failover and flexible restore options.

Novell's Forge appliance can recover workloads with a single click, and with this dashboard you can easily see the status of your virtual machines.

David Strom is the former editor-in-chief at Tom's Hardware and the founding editor-in-chief of Network Computing magazine. He has written thousands of articles for dozens of technical publications and websites, and written two books on computer networking.