Device for performance tuning in a system
First Claim
1. A storage control device coupled to a computer and a first storage system, the first storage system including a plurality of storage units, one of which is assigned to a logical unit in the storage control device, the storage control device comprising:
- a first port coupled to the computer;
a second port coupled to the first storage system; and
a control unit, coupled to the first port and the second port, which provides the logical unit, converts a first access request for the logical unit received by the first port into a second access request for a first storage unit of the plurality of storage units based on a relationship information including a first relation between the logical unit and the first storage unit, sends the second access request to the first storage system via the second port, and calculates performance of the second access request in the storage control device,wherein the first storage unit of the plurality of storage units is selected by the storage control device based on the relationship information and wherein it is determined whether a conflict over the second port or the control unit exists, whereby the storage control device determines performance of the logical unit in the storage control device.
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Accused Products
Abstract
In a storage subsystem, performance tuning is performed with respect to whole logical devices including external storage subsystems that are not directly connected to host computers.
Physical storage units presented by the external storage subsystems are defined as logical devices of the storage subsystem itself, and I/O processing requests from the host computers are relayed to those logical devices. At the time of relaying, I/O processing conditions are monitored. When there exists an external storage subsystem whose load is high, then, operating conditions of ports and processors are examined. In the case where the load can be reduced by changing the configuration of those ports and processors, the configuration is changed to reduce the load. In the case where 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.
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Citations
16 Claims
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1. A storage control device coupled to a computer and a first storage system, the first storage system including a plurality of storage units, one of which is assigned to a logical unit in the storage control device, the storage control device comprising:
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a first port coupled to the computer; a second port coupled to the first storage system; and a control unit, coupled to the first port and the second port, which provides the logical unit, converts a first access request for the logical unit received by the first port into a second access request for a first storage unit of the plurality of storage units based on a relationship information including a first relation between the logical unit and the first storage unit, sends the second access request to the first storage system via the second port, and calculates performance of the second access request in the storage control device, wherein the first storage unit of the plurality of storage units is selected by the storage control device based on the relationship information and wherein it is determined whether a conflict over the second port or the control unit exists, whereby the storage control device determines performance of the logical unit in the storage control device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification