US 7,624,241 B2Granted

Storage subsystem and performance tuning method

AssigneeHitachi, Ltd.

InventorsYoshiaki Eguchi, Yasutomo Yamamoto, Ai Satoyama, Akinobu Shimada

Life of this patent

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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.

Claims7

Dependent claims

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.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 11/594,787Filed 9 Nov 2006 · continuation
Priority: JP 2004-05193526 Feb 2004
Published: US 2007/0055820 A18 Mar 2007
Granted: 24 Nov 2009
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

G06F 3/0653
Making use of a particular technique: monitoring storage devices or systems
G06F 3/061
Specifically adapted to achieve a particular effect: improving I/O performance
G06F 3/0635
Configuration or reconfiguration of storage systems: by changing the path, e.g. traffic rerouting, path reconfiguration
G06F 3/0647
Horizontal data movement in storage systems, i.e. moving data in between storage devices or systems: migration mechanisms

Family

Application10/855,356Parent of this continuation · filed 28 May 2004
Application11/032,172Parent of this continuation · filed 11 Jan 2005
US 2007/0055820 A1Pre-grant publication · published 8 Mar 2007
US 7,155,587 B2Parent of this continuation
US 2005/0193167 A1Published application
US 2005/0193168 A1Published application
US 7,809,906 B2Related patent
US 7,624,241 B2This patent

From the US filing history. Foreign family members aren’t listed.