Patent ID: 8683025

Claim:
A method for managing a storage system in which a host for executing an application program is communicatable with a storage via an SAN (Storage Area Network) and a managing server via a LAN (Local Area Network), and a monitoring server for monitoring said storage is communicatable with said storage via the SAN and said managing server via said LAN, said managing method managing access performance by which said storage is accessed from said host, wherein: said host transmits both path information and a simultaneous command issue number to said managing server, said path information being equal to a plurality of paths where said host accesses a logical volume via at least the own host bus adapter, said SAN, and respective ports of said storage when said host executes said application program, and said simultaneous command issue number being equal to a total number of commands which are simultaneously issued in said respective of said plurality of paths; said monitoring server transmits a command multiplex number upper limit value of each of the respective ports of said storage to said managing server, said command multiplex number upper limit value being equal to a total number of commands which can be simultaneously executed at the respective port of the storage; when said managing server accepts said path information, said simultaneous command issue number, and said command multiplex number upper limit values of the respective ports, said managing server distributes said command multiplex number upper limit values of said respective ports to the respective paths which utilize said ports from said simultaneous command issue number so as to calculate a command multiplex upper limit value of each of the paths which utilize said ports, said command multiplex upper limit value of the respective path being based on both an amount for the command multiplex upper limit value determined for the respective path and registered in a table manner, and another amount of logical unit connected to each of the ports according to the path definition for each of the paths, and transmits said calculation result to said host; and said host sets the received command multiplex upper limit values of said respective paths with respect to said host bus adapter, wherein: when said host senses that a simultaneous command issue number of each of the paths has reached said command multiplex number upper limit value of each of said paths to provide a sensed result, said host notifies said sensed result to said managing server; and said managing server notifies an instruction to said host, said instruction instructing that a command multiplex number which has not yet reached the command multiplex number upper limit value, or a command multiplex number which has been allocated to a path whose business priority degree is low is temporarily moved to said path.