Patent ID: 7941620

Claim:
A data replication system, comprising: a data storage library having a plurality of source data sets; a plurality of host computers; a processor adapted to: receive at least a first backup request from a first of said plurality of host computers and a second backup request from a second of said plurality of host computers, wherein said first backup request requests a first source data set to be backed up and said second backup request requests a second source data set to be backed up; allocate an accumulated data set, and an index data set; copy at least said first source data set and said second source data set to the accumulated data set such that the accumulated data set includes at least said first source data set and said second source data set; calculate index information corresponding to the at least said first source data set and said second source data set copied to the accumulated data set; write the index information to the index data set; transmit the accumulated data set to at least said first of said plurality of host computers and said second of said plurality of host computers, such that each of said plurality of host computers requesting backup receives the entire accumulated data set; and transmit the index data set to at least said first of said plurality of host computers and said second of said plurality of host computers such that each of said plurality of host computers requesting backup receives the entire index data set.