International Business Machines Corporation

Abdullah Gharaibeh

Maohua Lu

Mihail Corneliu Constantinescu

David Allan Pease

Anurag Sharma

Data deduplication for data storage tapes includes intercepting tape control commands for a single data storage tape. The intercepted tape control commands are modified for adding processing logic and parameters for placement of deduplicated file data on the single data storage tape. Deduplication metadata is written to a metadata portion of the single data storage tape. The deduplicated file data is written to a data portion of the single data storage tape based on the placement to increase read throughput for a deduplicated set of individual files and to reduce an average number of per-file gaps on the single data storage tape without re-duplicating deduplicated data for meeting optimization of individual file accesses.

Optimized data placement for individual file accesses on deduplication-enabled sequential storage systems

Data deduplication for data storage tapes includes intercepting tape control commands for a single data storage tape. The intercepted tape control commands are modified by adding processing logic and parameters for placement of deduplicated file data on the single data storage tape. Deduplication metadata is written to a metadata portion of the single data storage tape. The deduplicated file data is written to a data portion of the single data storage tape based on the placement to increase read throughput for a deduplicated set of individual files and to reduce an average number of per-file gaps on the single data storage tape without re-duplicating deduplicated data for meeting optimization of individual file accesses.

Data deduplication for data storage tapes comprises determining the read throughput of a deduplicated set of individual files on a single data storage tape, and determining a placement of deduplicated file data on a single data storage tape to reduce an average number of per-file gaps on the tape. Deduplicated file data is placed on the single data storage tape based on said placement to increase an average read throughput for a deduplicated set of individual files.

Embodiments of the invention relate to a method and computer program product for providing a scalable representation of metadata for deduplicated storage systems. The method includes identifying shared data segments that are contained in a plurality of data objects in a deduplicated storage system. A data object centric graph is generated. The generating includes creating vertices that represent the data objects and creating edges between the data objects. An edge connecting two data objects indicates that the two data objects contain at least one shared data segment in common. Each shared data segment between any two data objects is represented by at most one of the edges. At least one of the data objects is manipulated based on the data object centric graph.

Growing community of inventors

Vancouver, Canada

Abdullah Gharaibeh