Storage management system and storage management method

摘要

PROBLEM TO BE SOLVED: To reduce storage cost, and to reduce response time required in reading data.SOLUTION: A storage management system applies identifier to data transmitted together with a request, and transmits data, on receipt of a write request, to a storage device of a plurality of storage device, which is determined in accordance with the identifier and a predetermined rule and stores the data as master data, and a storage device different from the above storage device and storing the data as replica data of the master data. Each of the storage devices includes first storage means of determining whether to store data as master data or replica data, on the basis of an identifier and a predetermined rule, to store the data, and second storage means which is storage means of a migration destination. When the data is determined to be stored as replica data, the data is stored in the second storage means.SELECTED DRAWING: Figure 10