US Patent 11269532 Data reduction by replacement of repeating pattern with single instance

A technique for managing data storage begins at a predetermined offset relative to a chunk of data received for writing, and identifies a span of contiguous regions of the chunk that contain identical data. The technique replaces the span of contiguous regions of the chunk with a single instance of a region of the contiguous regions. The technique persistently stores a shortened version of the chunk with the single instance replacing the span of contiguous regions.