Storage system
View Patent ↗A host I/F unit has a management table for managing an MPPK which is in-charge of the control of input/output processing for a storage area of an LDEV, and if a host computer transmits an input/output request for the LDEV, the host I/F unit transfers the input/output request to the MPPK which is in-charge of the input/output processing for the LDEV based on the management table, an MP of the MPPK performs the input/output processing based on the input/output request, and the MP of the MPPK also judges whether the MPPK that is in-charge of the input/output processing for the LDEV is to be changed, and sets the management table so that an MPPK which is different from the MPPK that is in-charge is to be in-charge of the input/output processing for the LDEV.
1. A storage system coupled to a host computer and a management computer, comprising:
a plurality of storage devices that are provided as a plurality of logical storage devices to the host computer;
an interface unit that is coupled to the management computer;
a shared memory that stores control information for the plurality of logical storage devices, said control information including ownership information for the logical storage devices;
a plurality of micro-processor packages, each of the plurality of micro-processor packages being associated with at least one micro-processor;
wherein the interface unit comprises management information for managing the plurality of micro-processor packages that are in-charge of controlling input/output processing for the storage area of the logical storage devices, and
a request transfer unit that transfers an input/output request to the micro-processor package that is in-charge of the input/output processing for the logical storage device based on the management information when the input/output request for the logical storage device is received from the host computer,
wherein each of the plurality of micro-processor packages:
(1) receives a request for changing ownership from a first micro-processor package, which is in charge of the logical storage device whose load is higher than other logical storage devices, to a second micro-processor package whose load is lower than other micro-processor packages,
(2) sets the management information and the control information such that the second micro-processor package is in charge of a logical storage device which the first micro-processor package was in charge of, and
(3) outputs a result of the changed ownership to the management computer.
2. The storage system as recited in claim 1 , wherein the first microprocessor package is in charge of a logical storage device whose load is the highest.
3. The storage system as recited in claim 1 , wherein the first microprocessor is in charge of a logical storage device whose load is highest among logical storage device s whose respective load is equal to or smaller than a predetermined threshold.
4. The storage system as recited in claim 1 , wherein the logical storage device load information and the micro-processor package load information is collected from other micro-processor packages, and the ownership is changed by considering said information.
5. A method of administering a storage system, which is coupled to a host computer and a management computer, comprising (1) a plurality of storage devices provided as a plurality of logical storage devices to the host computer, (2) an interface unit that is coupled to the management computer, (3) a shared memory that stores control information for the plurality of logical storage devices, said control information including ownership information for the logical storage devices, (4) a plurality of micro-processor packages, each of the plurality of micro-processor packages being associated with at least one micro-processor, and (5) a request transfer unit that transfers an input/output request to the micro-processor package that is in-charge of input/output processing for the logical storage device based on the management information when the input/output request for the logical storage device is received from the host computer, wherein the interface unit comprises management information for managing the plurality of micro-processor packages that are in-charge of controlling input/output processing for the storage area of the logical storage devices, the method comprising, among the plurality of micro-processor packages:
(a) receiving a request for changing ownership from a first micro-processor package, which is in charge of the logical storage device whose load is higher than other logical storage devices, to a second micro-processor package whose load is lower than other micro-processor packages,
(b) setting the management information and the control information such that the second micro-processor package is in charge of a logical storage device which the first micro-processor package was in charge of, and
(c) outputting a result of the changed ownership to the management computer.
6. The method of administering a storage system as recited in claim 5 , wherein the first microprocessor package is in charge of a logical storage device whose load is the highest.
7. The method of administering a storage system as recited in claim 5 , wherein the first microprocessor is in charge of a logical storage device whose load is highest among logical storage device whose respective load is equal to or smaller than a predetermined threshold.
8. The method of administering a storage system as recited in claim 5 , further comprising collecting the logical storage device load information and the micro-processor package load information from other micro-processor packages, and changing the ownership by considering said information.