Hitachi, Ltd.

Futoshi Haga

Yutaka Kudo

Yoshifumi Takamoto

Yuichi Taguchi

Takayuki Nagai

Norio Shimozono

Takeshi Ishizaki

Tomoki Sekiguchi

Toshio Otani

Tomohiro Morimura

Shuji Fujino

Hirofumi Inomata

Machiko Asaie

Hiroyuki Osaki

Norihiro Kobayashi

A system comprises a first storage system, a second storage system, a plurality of switches, and a server connected with the first storage system via a first group of switches and connected with the second storage system via a second group of switches. The first group and the second group have at least one switch which is not included in both the first and second groups. The first storage system receives I/O commands targeted to first logical units from the server via the first group of switches. The first storage system maintains first information regarding the ports of both the first and second storage systems. The first information is used to generate multipath communication between the server and the first storage system, including at least one path which passes through the second storage system and at least one other path which does not pass through the second storage system.

Multipath switching over multiple storage systems

The computer system has a plurality of physical server devices, a plurality of physical storage devices, and a management server device, and when migrating at least one of a plurality of first virtual server devices to another physical server device, the management server device compares at least one physical server device in which the plurality of first virtual server devices are disposed after the migration, with at least one physical server device in which a plurality of second virtual server devices are disposed, to calculate a first evaluation value, and also compares at least one physical server device in which the plurality of first virtual server devices are disposed after the migration, with at least one physical server device in which a plurality of third virtual server devices are disposed, to calculate a second evaluation value. Based on the first evaluation value and the second evaluation value, the management server device issues an instruction to migrate the first virtual storage device to the other physical storage device.

Management server device for managing virtual storage device, and method for managing virtual storage device

In an information system, for I/O migration, the migration management module detects a first I/O function associated with a first I/O device to which the OS is connected, selects a second I/O function associated with a second I/O device which is the same type of the first I/O device, and instructs to hot-add the second I/O function to the OS. And the OS sets a teaming for a first virtual MAC address of a first virtual NIC corresponding to the first I/O function and a second virtual MAC address of a second virtual NIC corresponding to the second I/O function, and disconnects the first virtual MAC address of the first virtual NIC corresponding to the first I/O function.

Method and apparatus of server I/O migration management

In a computer system to which a plurality of I/O devices are connected and a pool I/O device is included therein, a periodical operation confirmation is performed on a pool I/O device to be used when a fault occurs. A pool I/O device operation confirmation section obtains pool I/O device status information from a pool I/O device status information storage section (provided inside or outside the computer system). The status information includes a pool I/O device ID for identifying the pool I/O device, a type of the pool I/O device, a status value indicating an operation confirmation result, and an update time indicating the most recent operation confirmation time. Then, the pool I/O device operation confirmation section activates the pool I/O device and performs an operation confirmation thereon; terminates the operation of the pool I/O device after the operation confirmation; and updates the pool I/O device status information using the operation confirmation result obtained by the operation confirmation.

Pool I/O device operation confirmation method and computer system

A policy creation support system is provided, which is capable of reducing cost for creation of an effective autonomic control policy. The policy creation support system measures information indicating performance of a monitoring target system, with regard to a monitoring item of a designated type, for each resource amount of an expandable resource, and selects one representative measurement value from among measurement values on a resource-amount basis. Then, the policy creation support system outputs the monitoring item, the resource amount serving as the monitoring item, and a range of the measurement value corresponding to the resource amount, as a countermeasure decision condition within a policy, by setting a range including the selected representative measurement value as the range of the measurement value.

Policy creation support method, policy creation support system, and program therefor

An execution multiplicity control system is provided which measures a load distribution over service objects for each case when one type of service requests are inputted into a distributed object system; calculates an effect index for when the execution multiplicity of each of the service objects is varied, based on the load distribution; measures, for each type of the service requests, the number of service requests actually inputted, to acquire a request distribution; calculates and stores a total effect index for when the execution multiplicity of each of the service objects is varied, based on the effect index and the request distribution; and controls the execution multiplicity of the service objects by applying a method of controlling the execution multiplicity of the service objects in descending order of the respective total effect indices calculated.

Execution multiplicity control system, and method and program for controlling the same

In a business system which allocates a request for one business application to one or more of the computer resources executing such business application, the computer resources are accommodated among the plurality of the business systems so that the load covered by each of the business systems is averaged out. The arbitration apparatus for resource allocationcalculates a margin rate for each business system by measuring load for respective business systems, and by calculating a ratio of the measured load and the allowable execution amount allowable under current constitution. When a computer resourcewhich is not allocated to business system is found, this computer resource is allocated to the business system indicating low margin rate while if such computer resourceis not found, the computer resourceis reallocated by being released from the business system having high margin rate.

Arbitration apparatus for allocating computer resource and arbitration method therefor

In a system which divides requests to an application, into computers on which the application is operating, computers are managed so as to prevent the lowering of the service level of each application. The resource assigning management apparatussubtracts a total number of request counts (receive request count) received per unit tame by each server computer which is assigned to the application, from the total number of requests processible per unit time by each server computerwhich is assigned to the application (request processible count), and calculates a resource amount available from the application to another application. Then, allocation of at least one server computerthat is assigned to the resource-excessive application is changed to an application which is lacking resources.

Resource assigning management apparatus and resource assigning method

A server performance measurement system for efficiently measuring and collecting server performance differently depending on each business application in actual operation environment in which business applications are operated, includes a plurality of servers for processing requests from users, a load balancer for suitably distributing loads of the plurality of servers, a test management server computer and a test load control server computer, which can communicate with one another. The test management server computer includes a test start/end information processing unit, a server setting control unit, a test result information processing unit and a test result information management unit. The business application is operated in at least one of the plurality of servers to measure performance of the server.

Method for measuring server performance, system for measuring server performance and computer programs therefor

In a data center architecture or the like, the present invention provides a method for setting up hosting environments concurrently by loading a boot image by means of network boot or the like, allowing for fast booting even with a large boot image, while preserving security. A boot image is divided into a plurality of parts. Computer resources have their public keys stored in their BIOS ROMs and e-signatures are attached to the boot image parts with a private key corresponding to one of the public keys. Also, priority levels in e-signature verification are assigned to the boot image parts. A boot instruction includes priority level setting. Only for boot image parts with that priority level or higher, e-signature verification is performed. By this manner, booting can be performed faster than booting involving verification of the e-signature to a whole boot image.

Method and system for setting up hosting environments in safety

In a system in which requests to an application are distributed to computers on which the application in question is executed, computers are managed so as to prevent lowering of the service level of each application. A resource assignment managermanages specifications of server computers. Further, the resource assignment managermanages, for each application, correspondence between specifications of a server computerand the number of processed requests in the case where the application in question is executed on a server computerhaving those specifications. For each application, the resource assignment managermonitors the number of received requests and the number of processed requests on server computersto which the application in question, to specify an application deficient in resources. Then, the resource assignment managerdetermines server computersthat are assigned additionally to the specified application, based on the required resource amount for the specified application, specifications of each of pooled server computers, and the correspondence between specifications of a server computerand the number of processed requests expected when the specified application is executed on a server computerhaving those specifications.

Resource assignment manager and resource assignment method

In a storage system including an information processing apparatus and a storage apparatus that is communicably connected to the information processing apparatus via a communication network and that writes or reads data to or from a storage device in response to a data write/read request transmitted from the information processing apparatus, real resource operations are managed, with virtual resources set by assigning the real resources and the settings changed in conformity with the operating status of the real resources.

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Sagamihara, Japan

Futoshi Haga