| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that the existing technology is deficient in its ability to provide a deduplication technology for a storage system having good reliability characteristics. SOLUTION: In one embodiment, a storage system comprises host computers, a management terminal and a storage system, which has a block interface to communicate with the host computers/clients. The storage system also incorporates a deduplication capability using chunks (divided storage area). The storage system maintains a threshold (upper limit) with respect to the degree of deduplication (i.e. number of virtual data for one real data), wherein the degree of deduplication is specified by users or the management software. The storage system counts the number of links for each chunk and does not perform deduplication when the number of reduced data for a chunk exceeds the threshold, even if duplication is detected. COPYRIGHT: (C)2009,JPO&INPIT
|
