STORAGE SYSTEM AND UTILIZATION MANAGEMENT METHOD FOR STORAGE SYSTEM

摘要

A storage system providing a storage area to an external device comprises a plurality of storage apparatuses and of different performance capabilities, and a storage controller. The storage controller holds storage cost coefficients 3202 of the respective storage apparatuses and user cost allocation information 3302 for each user using the storage system from the external device and user cost distribution information 3402 that defines, for each user, proportions of an available space amount distributed to the storage apparatuses. The storage controller calculates an ideal utilization 3502 for each user, from the storage cost coefficients 3202 and the user cost distribution information 3402, and allocates, for each user, the ideal utilization 3502 to each of the storage apparatuses and in the order of the performance capabilities from highest to lowest.