| 摘要 |
PROBLEM TO BE SOLVED: To obtain a data storage system that receives a data set from a software module. SOLUTION: The data storage system (10) includes first and second hierarchical storage devices (240, 242), a redundancy reducer (21) and a migration engine (28). The redundancy reducer (21) subdivides the data set into a plurality of data blocks (20) and reduces the redundancy of the data blocks (20). The migration engine moves one or more of the data blocks between the first and second hierarchical storage devices based on a migration parameter of the data block. The first hierarchical storage device has a first effective storage capacity and a first I/O bandwidth and the second hierarchical storage device has a second effective storage capacity that is greater than the first effective storage capacity and a second I/O bandwidth that is less than the first I/O bandwidth. The first hierarchical storage device has a first access time to data and the second hierarchical storage device has a second access time to data that is longer than the first access time to data. COPYRIGHT: (C)2007,JPO&INPIT |
