Abstract: A method, a system, and a computer program product for protection and recovery of backup storage systems from ransomware attacks. A request to modify data stored in a storage system is received. The storage system includes at least one component configured to store the deduplicated data. An acknowledgement of the received request is generated. The acknowledgement indicates that the data stored in the at least one component and identified in the received request was modified. Modification of the data stored in the at least one component and identified in the received request for a predetermined period of time is prevented.

Abstract: A system, a method and a computer program product for storing data, which include receiving a data stream having a plurality of transactions that include at least one portion of data, determining whether at least one portion of data within at least one transaction is substantially similar to at least another portion of data within at least one transaction, clustering together at least one portion of data and at least another portion of data within at least one transaction, selecting one of at least one portion of data and at least another portion of data as a representative of at least one portion of data and at least another portion of data in the received data stream, and storing each representative of a portion of data from each transaction in the plurality of transactions, wherein a plurality of representatives is configured to form a chain representing the received data stream.

Abstract: A method, a system, and a computer program product for executing synthetic backup processes and deduplication backup storage with landing zone. A synthetic backup of a data file is received. A partial re-synthesis of the synthetic backup of the data file is performed. A total size of the partial re-synthesized backup of the data file and the received synthetic backup is determined. A size of a complete re-synthesis of the synthetic backup of the data file is computed. The complete re-synthesis of the synthetic backup of the data file is performed when the determined total size exceeds the computed size of the complete re-synthesis of the synthetic backup of the data file.

Abstract: A method, a system, and a computer program product for performing accelerated and memory efficient similarity matching. A data stream having a plurality of data zones is received. Each zone includes a zone identifier. A plurality of hashing values for each zone are generated. Each hashing value is generated based on a portion of a zone. A storage structure having a plurality of storage containers is generated. Each storage container stores one or more hashing values associated with each respective storage container and a plurality of zone identifiers referencing the associated hashing values. At least one storage container includes a listing of zone identifiers stored in each storage container. Using the storage structure, the received data stream is deduplicated.

Abstract: A method, a system, and a computer program product for performing a backup of data are disclosed. A grid server in a plurality of grid servers is selected for deduplicating a segment of data in a plurality of segments of data contained within a data stream. The segment of data is forwarded to the selected grid server for deduplication. A zone contained within the forwarded segment of data is deduplicated using the selected server. The deduplication is performed based on a listing of a plurality of zone stamps. Each zone stamp in the plurality of zone stamps represents a zone in a plurality of zones deduplicated by at least one server in the plurality of grid servers.

Abstract: A system, a method, and a computer program product for performing deduplication of data using a scalable deduplication grid are disclosed. A listing of a plurality of zone stamps is generated, where each zone stamp represents a zone in the plurality of zones in a data stream. The listing contains a logical arrangement of the plurality of zone stamps obtained from each storage location and being accessible by a plurality of servers. A first zone stamp in the listing is compared to a second zone stamp in the listing. The first and second zones are delta-compressed based on a determination that the first zone stamp is substantially similar to the second zone stamp. A server is selected to perform the comparison and delta-compression.

Abstract: A system, a method, and a computer program product for adaptively management bandwidth of a deduplication system are disclosed. A bandwidth policy for replication of data from a first deduplication location to a second deduplication location is determined. The bandwidth policy allocates a predetermined bandwidth for the replication of data. The deduplication locations are communicatively coupled via a network. Using the determined bandwidth policy, data from the first deduplication location is replicated to the second deduplication location based on the allocated bandwidth.

Abstract: Delta compression method, system and computer program product. Portions of source and target data files are hashed using a hashing function. A target data file is compared against the source data file to determine at least one delta difference between the files. A source data file hashing table is generated. The table includes hashed portions of the source and target data files stored in corresponding source file offset locations and corresponding target file offset locations, respectively. Portions of the source and target files are compared using corresponding source and target file offset locations. At least one common sequence of characters in the portions of the source and target files is determined based on the comparison. A patch file is generated based on the determined sequence of characters.

Abstract: A method, a system and a computer program product for performing deduplicating data. A data stream having a plurality of data zones is received. One or more data storage locations in a plurality of data storage locations for deduplicating one or more zones in the plurality of zones is identified. Each data storage location stores its respective deduplicated data zones. A data storage location for deduplicating a first data zone is selected. The first data zone is deduplicated using the selected data storage location.

Abstract: A system, a method and a computer program product for storing data, which include receiving a data stream having a plurality of transactions that include at least one portion of data, determining whether at least one portion of data within at least one transaction is substantially similar to at least another portion of data within at least one transaction, clustering together at least one portion of data and at least another portion of data within at least one transaction, selecting one of at least one portion of data and at least another portion of data as a representative of at least one portion of data and at least another portion of data in the received data stream, and storing each representative of a portion of data from each transaction in the plurality of transactions, wherein a plurality of representatives is configured to form a chain representing the received data stream.

Abstract: A method, a system, and a computer-implemented method for performing multi-level deduplication of data are disclosed. A zone stamp is generated for each zone in a plurality of zones contained in at least one data stream. The zone stamp is compared to another zone stamp. The zone stamp and another zone stamp represent zones in the plurality of zones. The comparison is performed for zones at corresponding zone levels based on a determination that a zone stamp of a zone of a preceding zone level is not similar to another zone stamp of another preceding zone level. The zone at the preceding zone level includes at least one zone of a next zone level having a size smaller than or equal to a size of the zone of the preceding zone level. The zone and another zone are deduplicated based on a determination that the zone stamp is similar to another zone stamp.

Abstract: A method, a system, and a computer program product for performing a backup of data are disclosed. A grid server in a plurality of grid servers is selected for deduplicating a segment of data in a plurality of segments of data contained within a data stream. The segment of data is forwarded to the selected grid server for deduplication. A zone contained within the forwarded segment of data is deduplicated using the selected server. The deduplication is performed based on a listing of a plurality of zone stamps. Each zone stamp in the plurality of zone stamps represents a zone in a plurality of zones deduplicated by at least one server in the plurality of grid servers.

Abstract: A system, a method, and a computer program product for performing deduplication of data using a scalable deduplication grid are disclosed. A listing of a plurality of zone stamps is generated, where each zone stamp represents a zone in the plurality of zones in a data stream. The listing contains a logical arrangement of the plurality of zone stamps obtained from each storage location and being accessible by a plurality of servers. A first zone stamp in the listing is compared to a second zone stamp in the listing. The first and second zones are delta-compressed based on a determination that the first zone stamp is substantially similar to the second zone stamp. A server is selected to perform the comparison and delta-compression.

Abstract: A method, a system, and a computer program product for performing a backup of data are disclosed. A grid server in a plurality of grid servers is selected for deduplicating a segment of data in a plurality of segments of data contained within a data stream. The segment of data is forwarded to the selected grid server for deduplication. A zone contained within the forwarded segment of data is deduplicated using the selected server. The deduplication is performed based on a listing of a plurality of zone stamps. Each zone stamp in the plurality of zone stamps represents a zone in a plurality of zones deduplicated by at least one server in the plurality of grid servers.

Abstract: A system, a method, and a computer program product for delta version clustering and re-anchoring are provided. A first anchor having a plurality of delta-compressed versions of data dependent on the first anchor is generated. The first anchor and the plurality of delta-compressed versions form a cluster. A second anchor is generated. The first anchor is replaced with the second anchor. The replacing includes re-computing at least one delta-compressed version in the plurality of delta-compressed versions to be dependent on the second anchor. The second anchor replaces the first anchor as an anchor of the cluster.

Abstract: A system, a method, and a computer program product for or managing grid server system resource(s) are disclosed. A processor of a grid server in a plurality of grid servers determines an ingestion rate of data received by the grid server for a backup. The ingestion rate corresponds to a speed of transferring of the received data into a memory of the grid server. The processor determines a deduplication and replication rate of the received data. Deduplication represents a deduplication of the received data by the grid server. Replication represents replication of the deduplicated received data to another server in the plurality of servers. The processor adjusts the deduplication and replication rate based on the ingestion rate.

Abstract: A method, a system, and a computer program product for performing next level multi-level deduplication. A first zone stamp for a first data zone is generated and compared to a second zone stamp representing a second data zone, where the zones are first level data zones. The first and second data zones are deduplicated when the first zone stamp matches the second zone stamp. A second-level first zone stamp is selected when there is no match between first and second zone stamps. The second-level first zone stamp, representing a second-level first data zone in the first data zone, is compared to the second zone stamp and/or a second-level second zone stamp representing a second-level second data zone. The second-level first zone and one of the second data zone and the second-level second zone are deduplicated when the second-level first zone stamp matches one of the second zone stamp and the second-level second zone stamp.

Abstract: A method, a system, and a computer-implemented method for performing multi-level deduplication of data are disclosed. A zone stamp is generated for each zone in a plurality of zones contained in at least one data stream. The zone stamp is compared to another zone stamp. The zone stamp and another zone stamp represent zones in the plurality of zones. The comparison is performed for zones at corresponding zone levels based on a determination that a zone stamp of a zone of a preceding zone level is not similar to another zone stamp of another preceding zone level. The zone at the preceding zone level includes at least one zone of a next zone level having a size smaller than or equal to a size of the zone of the preceding zone level. The zone and another zone are deduplicated based on a determination that the zone stamp is similar to another zone stamp.

Abstract: A method, a system, and a computer-implemented method for performing multi-level deduplication of data are disclosed. A zone stamp is generated for each zone in a plurality of zones contained in at least one data stream. The zone stamp is compared to another zone stamp. The zone stamp and another zone stamp represent zones in the plurality of zones. The comparison is performed for zones at corresponding zone levels based on a determination that a zone stamp of a zone of a preceding zone level is not similar to another zone stamp of another preceding zone level. The zone at the preceding zone level includes at least one zone of a next zone level having a size smaller than or equal to a size of the zone of the preceding zone level. The zone and another zone are deduplicated based on a determination that the zone stamp is similar to another zone stamp.

Abstract: A system, a method, and a computer program product for adaptively management bandwidth of a deduplication system are disclosed. A bandwidth policy for replication of data from a first deduplication location to a second deduplication location is determined. The bandwidth policy allocates a predetermined bandwidth for the replication of data. The deduplication locations are communicatively coupled via a network. Using the determined bandwidth policy, data from the first deduplication location is replicated to the second deduplication location based on the allocated bandwidth.