Storage subsystem and performance tuning method
First Claim
1. A method for managing a performance of a storage system, the storage system including a storage subsystem including a plurality of storage units and a storage control device coupled to a computer and the storage subsystem, the storage control device providing the host computer with a logical unit assigned to a storage unit of the storage subsystem, the method comprising the steps of:
- receiving, at the storage control device, a first access request from the computer to the logical unit;
sending a second access request from the storage control device to the storage unit of the storage subsystem according to a relation between the storage unit of the storage subsystem and the logical unit assigned to the storage unit; and
obtaining performance information relating to the second access request by the storage control device so that the storage control device determines performance relating to the logical unit assigned to the storage unit of the storage subsystem.
0 Assignments
0 Petitions
Accused Products
Abstract
In a storage subsystem, performance tuning is performed with respect to all of the logical devices including external storage subsystems that are not directly connected to host computers. The physical storage units presented by the external storage subsystems are defined as logical devices of the storage subsystem, and I/O processing requests from the host computers are relayed to the logical devices. At the time of relaying, I/O processing conditions are monitored. When the load of an external storage subsystem is high, then operating conditions of ports and processors are examined. When the load can be reduced by changing the configuration of those ports and processors, the configuration is changed to reduce the load. When the load can not be reduced, data is migrated from a logical device having a high load to a logical device having a sufficient performance.
-
Citations
7 Claims
-
1. A method for managing a performance of a storage system, the storage system including a storage subsystem including a plurality of storage units and a storage control device coupled to a computer and the storage subsystem, the storage control device providing the host computer with a logical unit assigned to a storage unit of the storage subsystem, the method comprising the steps of:
-
receiving, at the storage control device, a first access request from the computer to the logical unit; sending a second access request from the storage control device to the storage unit of the storage subsystem according to a relation between the storage unit of the storage subsystem and the logical unit assigned to the storage unit; and obtaining performance information relating to the second access request by the storage control device so that the storage control device determines performance relating to the logical unit assigned to the storage unit of the storage subsystem. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
Specification