Patent ID: 8140821
Filing Date: 2012-03-20
Classification: G06F

Abstract:
1. A system configured to optimize access to stored chunks of data content, the system comprising: a virtual logic unit (vLUN) layer that corresponds to one of a plurality of layers in an input/output (I/O) path of a computer system, the vLUN providing a plurality of logical chunk addresses (LCAs) to layers disposed above it in the I/O path, such that the LCAs in the vLUN are the only LCAs visible to layers above the vLUN; a mapped logical unit (mapped LUN) layer disposed below the vLUN in the I/O path and being in operable communication with the vLUN, the mapped LUN associated with a plurality of physical chunk addresses (PCAs), each PCA configured to provide physical storage for a respective chunk of data; a mapping layer disposed between and in operable communication with the vLUN and the mapped LUN layers, the mapping layer defining a layout of the mapped LUN that helps improve the efficiency of read and write access to the mapped LUN, the layout comprising: