Peer Fusion Assigned Patent

Peer Fusion, Inc., Milpitas, CA, has been assigned a patent (8,315,995) developed by Richard S. Levy, Milpitas, CA, for "a hybrid storage system."

The abstract of the patent published by the U.S. Patent and Trademark Office states: "Roughly described, a tiered storage system has a filesystem that promotes and demotes data among tiers at block granularity. It maintains a logical-to-physical mapping which indicates for each block in a file both the assigned tier and the physical block number within the tier. Methods for performing file- and block-level manipulations are described. In an embodiment, a nominal tier is managed by a native file system, and higher tiers are managed by a super file system. The super file system manages promotion and demotion among the tiers, interfacing with higher tiers directly but interfacing with the nominal tier only through the native file system. The native file system defines the file namespace in the system, and the logical-to-physical block mapping for blocks in the nominal tier. The super file system defines the logical-to-physical mapping for blocks in the higher tiers, but retains the file identification information as defined by the native file system."

The patent application was filed on Sept. 9, 2009 (12/556,518).