Abstract: A computer implemented method and system obtains current signatures of data chunks and performs a proximity search of a library of previous signatures as a function of the likely location of corresponding data chunks. A full search of the library of previous signatures for those current signatures not found in the proximity search is also performed.

Abstract: The various embodiments herein include operate to identify, consolidate, and reduce redundant backup data storage. One embodiment includes storing data blocks and first signatures of data chunks of each stored data block, the first signature of each data chunk including a reference to a storage location of the data chunk within a stored data block, the stored data blocks including data blocks of previous and recent backup sessions. Some embodiments further include storing second signatures in a second signature repository, where the second signatures are calculated based on determined boundaries of the first signatures from previous backup sessions. At least one of the second signatures is calculated based on at least two first signatures, and in the range of 32 to 64 first signatures in some embodiments. Some embodiments may identify data chunks of the recent backup session present in the stored data blocks prior to the recent backup session.

Abstract: According to one embodiment of the present invention, a method for integrating client and server deduplication systems may be provided. In this method, a first hash set of a previous backup session may be received from a server. The first hash set may comprise a plurality of cryptographic values generated using a plurality of data blocks of a first data set of a client. A second hash set may be generated using a plurality of data blocks of a second data set of the client. A deduplicated data set may be generated by the client according to the first hash set and the second hash set and may comprise a plurality of non-redundant data blocks of the second data set. The second hash set and the deduplicated data set may be transmitted to the server.

Abstract: The various embodiments herein include operate to identify, consolidate, and reduce redundant backup data storage. One embodiment includes storing data blocks and first signatures of data chunks of each stored data block, the first signature of each data chunk including a reference to a storage location of the data chunk within a stored data block, the stored data blocks including data blocks of previous and recent backup sessions. Some embodiments further include storing second signatures in a second signature repository, where the second signatures are calculated based on determined boundaries of the first signatures from previous backup sessions. At least one of the second signatures is calculated based on at least two first signatures, and in the range of 32 to 64 first signatures in some embodiments. Some embodiments may identify data chunks of the recent backup session present in the stored data blocks prior to the recent backup session.

Abstract: A computer implemented method and system obtains current signatures of data chunks and performs a proximity search of a library of previous signatures as a function of the likely location of corresponding data chunks. A full search of the library of previous signatures for those current signatures not found in the proximity search is also performed.