Storage area network system, storage, and data transfer amount monitoring apparatus

摘要

A storage area network system in which a plurality of servers access a storage through a storage area network to conduct transmittance of data: the storage has a plurality of ports each differing in data transfer speed, and one or more data memory resources connected to these ports; the respective servers are prescribed a predetermined data transfer amount regarding the data transmittance of the storage and the data memory resource through the ports; a data transfer amount monitoring means is provided to obtain and monitor the data transfer amount between the respective servers and the storage; wherein the data transfer amount monitoring means compares the prescribed data transfer amount of the server and the obtained actual data transfer amount, selects either one of the ports of the storage according to the comparison result, and gives the relevant server an instruction to connect to the port.