Patent ID: 8682873

Claim:
A system, for a plurality of new input data segments in a deduplication storage system, for facilitating construction of a synthetic backup, the synthetic backup being independent of and constructed from an originating backup being a full, existing backup, the system comprising: a memory; and at least one processor device in communication with the memory, operable in the deduplication computing storage environment, wherein the at least one processor device is adapted for: for each new input data segment of the plurality of new input data segments, retrieving a plurality of stored deduplication digests of stored data segments, referenced by the new input data segments, the stored data segments being data taken from the originating backup, and the plurality of stored deduplication digests being deduplication digests calculated from the stored data segments, partitioning each new input data segment into each of a plurality of fixed-sized data sub-segments, for each of the plurality of data sub-segments, during the construction of the synthetic backup, calculating each of a plurality of input deduplication digests based on the retrieved plurality of stored deduplication digests, aggregating each of the plurality of sub-segment deduplication digests to generate a deduplication digest of each new input data segment, searching the plurality of stored deduplication digests of the stored data segments for matches with the deduplication digest of each new input data segment to thereby deduplicate each new input data segment, and forming a deduplication digest of the synthetic backup from the deduplication digests of each new input data segment.