Breaking Down the Storage Virtualization Barriers Page 2


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A SAN-Ready File System

IBM has crews working on each of these points. In February, it incorporated the Storage Networking Industry Association's Storage Management Initiative Standard (SMI-S) into its Enterprise Storage Server equipment to improve interoperability between its own and other vendors' equipment. Its autonomic computing project, formerly called eLiza, is gradually adding self-management features to a number of IBM products.

The big news, however, is in the storage virtualization arena. In 1997 a team at IBM's Almaden Research Facility started developing a new file system to unite all the distributed devices in a heterogeneous network and that features the ability to scale up to hundreds of servers holding billions of files containing petabytes of data accessed by thousands of users.

"Those of us who came from mainframes expected that a lot of machines should be able to get at and share the same storage resources, but in the open systems that had not happened," says David Pease, Manager of Storage Software at IBM's Almaden Research Facility in San Jose, CA. "SANs give the hardware infrastructure to do that kind of sharing and resource centralization, but it was clear to us that it would take a major new file system infrastructure to fully realize all the benefits of SANs."

This new file system doesn't replace any existing file systems, but rather supplements them.

"In a Windows environment it appears as just another drive letter, Drive S, while in Unix it gets mounted at a mount point and is part of your file space," Pease explains.

Called the TotalStorage SAN File System, it will be available as an integrated hardware and software package starting in December 2003, extending the storage virtualization's function. Among other things, it improves data sharing and the ease and efficiency of access to data, and also reduces the application downtime caused by storage and data management tasks — all of which produces the benefit of lightening the load on the IT staff.

"The new system improves productivity and reduces the pain for IT storage and server management staff," says Zisman.

Feature courtesy of EITPlanet.

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