Method for rearranging a logical volume in a network connected storage system

A management server for managing application servers and at least one storage subsystem provide logical volumes by parity groups in the at least one storage subsystem,

• wherein in the application servers, a plurality of server volumes are defined to associate with the logical volumes,
• wherein the management server comprises:
• a memory and/or storage device storing mapping information indicating a mapping between the logical volumes, the application servers, and the plurality of server volumes, and performance information about the parity group and the logical volumes;
• and
• a CPU (Central Processing Unit) to be configured to:
• (A) acquire required I/O (Input/Output) performance information and rearranging rule information at least including a first condition;
• and
• (B) by using the mapping information, the performance information, the required I/O performance information, and the rearranging rule information, determine a first logical volume to be rearranged from the logical volumes and a rearranging destination parity group from the parity groups, and
• wherein the first condition indicates a maximum number of server volumes associating with the rearranging destination parity group.

A computer readable medium storing a program for a management server for managing application servers and at least one storage subsystem provide logical volumes by parity groups in the at least one storage subsystem,

• wherein in the application servers, a plurality of application are executed by using the logical volumes,
• wherein the program comprises:
• storing mapping information indicating a mapping between the logical volumes, and the plurality of applications;
• storing performance information about the parity group and the logical volumes;
• acquiring required I/O (Input/Output) performance information and rearranging rule information at least including a first condition;
• and
• determining a first logical volume to be rearranged from the logical volumes and a rearranging destination parity group from the parity groups, by using the mapping information, the performance information, the required I/O performance information, and the rearranging rule information, and
• wherein the first condition indicates a maximum number of applications associating with the rearranging destination parity group.