Hitachi, Ltd.

Ricoh Company, Ltd.

Nissan Motor Company Limited

The Furukawa Electric Co., Ltd.

Hitachi Ome Electronic Co., Ltd.

Nitivy Co., Ltd.

Hitachi Ome Electric Co., Ltd.

Kouji Masuda

Yoshifumi Takamoto

Seizo Suzuki

Keisuke Hatasaki

Yoshinori Hayashi

Takao Nakajima

Masao Mizukami

Nobuaki Kitamura

Osamu Suzuki

Yasunari Hanaki

Masahiro Takaya

Jun Nakayama

Nobuyuki Morita

Shinya Takuwa

Yasuyuki Kambara

Masayuki Fukuyama

Satoshi Yoshimura

Junji Ito

Hitoshi Ueno

Toshiharu Miyamura

Hideaki Morisaka

Masatoshi Yoshida

Shinji Hotta

Hitoshi Murakami

Toshiki Kunimi

Michiaki Sagesaka

Naoki Harakawa

Suzuki Seizo

Hidenobu Muramatsu

An operation content evaluation system for evaluating an operation content for controlling computer resources, the operation content evaluation system including: a content site including a content management server for distributing operation contents for controlling computer resources; and a user site including a content evaluation server for evaluating one of the operation contents and computer resources, wherein the content management server holds catalogs associated one-to-one with the operation contents and each of the catalogs includes prerequisites for executing an operation content and evaluation elements for the operation content, wherein the content evaluation server holds configuration information collected from the computer resources in resource management information, and wherein the content evaluation server acquires the catalogs from the content management server, selects a catalog associated with the operation content to be evaluated from the catalogs, and evaluates the operation content by comparing the selected catalog with the resource management information.

Operation content evaluation system and storage medium

A fibrous structure () of the present invention includes: long fibers () composed of an inorganic material; and short fibers () composed of the inorganic material and shorter than the long fibers (), wherein at least one of the long fibers () and the short fibers () includes catalyst components (), and a three-dimensional net-like structure is formed by the long fibers () and the short fibers ().

Fibrous structure and particulate filter type exhaust gas purifying catalyst

An information processing system including a plurality of server apparatuses coupled to one another, wherein failover is executed. A management server is coupled to the server apparatuses, and is configured to, when detecting occurrence of a failure in an active server apparatus, execute failover from the active server apparatus to a standby server apparatus after turning on a power supply of the standby server apparatus. The management server is enabled to acquire information on the standby server apparatus after turning on the power supply of the standby server apparatus, turn off the power supply of the standby server apparatus after acquiring the information, and, based on the acquired information, judge whether failover to the standby server apparatus can be executed.

Control method for information processing system, information processing system, and program

An object of the present invention is to ensure, in an information processing system including a plurality of server apparatuses coupled to one another, reliability and availability thereof when failover is executed. In an information processing system, which includes a plurality of server apparatuses coupled to one another, and a management server coupled to the server apparatuses, and is configured to, when detecting occurrence of a failure in an active server apparatus of the server apparatuses, execute failover from the active server apparatus to a standby server apparatus of the server apparatuses after turning on a power supply of the standby server apparatus whose power supply having been turned off, the management server is enabled to: acquire information on the standby server apparatus after turning on the power supply of the standby server apparatus; turn off the power supply of the standby server apparatus after acquiring the information; and, based on the acquired information, judge whether or not failover to the standby server apparatus can be executed. Additionally, an acquisition method of the information can be selected in accordance with an allocated status of the standby server apparatus.

The active server Anotifies its own operating status to the administration server, and the administration serveracquires a snapshot and copies a disk according to the policy established by a user. When the active server Aor the active diskfails, the administration serverchooses a backup server Aand a status storage disk Ato be booted and restarts them by using the snapshot according to the policy.

Restarting method using a snapshot

The invention is to provide a failover method for improving overall reliability of a system including a large number of servers. Priorities set based on operating statuses of respective servers and shared devices capable of communicating with the respective servers in a failover system are stored in a storage portion while the priorities are associated with the respective servers, so that a failure processing portion of a management server retrieves a server based on the priorities and designates the retrieved server as a spare server when a failure occurs in one of the servers.

Failover method, program, failover apparatus and failover system

A computer system having computers executing programs, a management computer managing said computers, and a storage system which can be accessed from said computers via a network, wherein said management computer includes: a storage unit for storing network identity information of said network which is allocated to said computers, application identity information indicating said programs, and area identity information indicating areas in said storage system in which said programs are stored, said network identity information and said area identity information being related to said application identity information, a control unit for sending to said computers said network identity information and said area identity information corresponding to said application identity information, in order to boot programs indicated by said application identity information, in response to entry of a boot request including said application identity information.

Controlling method, computer system, and processing program of booting up a computer

An inorganic fiber catalyst includes an alumina-silica fiber base material, and a plurality of catalyst component particles contained in the alumina-silica fiber base material. A mean particle diameter of the catalyst component particles contained in at least a surface portion of the alumina-silica fiber base material is 50 nm or less, and a standard deviation of particle diameters of the catalyst component particles is 30 or less.

Inorganic fiber catalyst, production method thereof and catalyst structure

A light reflector and a planar light source achieving high average luminance and little luminance unevenness are provided. In a light reflector including a reflector and a reflective chevronwise partition plate projecting in a shape of a chevron from the reflector, a reflective planar partition plate is provided, connected to a peak section of the chevronwise partition plate such as to project upwards from the peak section. The chevronwise partition plate and the planar partition plate are disposed between adjacent linear light sources.

Light reflector and planar light source

In a planar light source in which a plurality of linear light sources are arranged in parallel between a reflector and a diffuser that are disposed in parallel, and a reflective chevronwise partition plate is provided between adjacent linear light sources, the following conditions are met: T=(H+Q)/2&#x2212;D/2, &#x3b8;&#x3c;90&#xb0; &#x2212;arctan(Q/L), &#x3b8;&#x3c;{90&#xb0; +arctan(T&#x2212;Q)/(P/2)}/2. A vertical distance from the reflector to a peak section of the chevronwise partition plate is T. A vertical distance from the reflector to a center of a linear light source is Q. A vertical distance from the reflector to the diffuser is H. A horizontal distance from the center of the linear light source to a foot section of the chevronwise partition plate is L. A horizontal distance between the centers of adjacent linear light sources is P. A diameter of the linear light source is D. A foot angle of the chevronwise partition plate is &#x3b8;.

Planar light source

In investigating the cause of a fault in a computer storage system, it is considered useful to previously prepare maintenance logical units (LUs) of a simple structure, the operation of which has been confirmed. If the same number of LUs as servers are prepared for each server as in the prior art, the efficiency is low. Furthermore, securing these LUs complicates assignment of the LUs for construction of a system and a work for addressing the fault. The present invention provides a computer system free of these problems. The computer system has a first computer for executing a first OS (operating system), a second computer for executing a second OS, and a storage array system. The storage array system uses a disk device having a logical unit (LU) for storing a boot loader, as well as the first and second OSes. The boot loader is executed on any one of the two computers, reads in any of the OSes corresponding to the currently operating computer into this operating computer, and executes the read OS.

Computer system for booting a diskless server after a fault by reading a boot loader from a maintenance logical unit and identifying a boot file based on identifier of diskless server

A switch control system including a storage unit, a switch which logically sets a network topology between the storage unit and a plurality of computers, and a management server which communicates with the switch and the storage unit, wherein the storage unit includes at least one disk; wherein the management server comprises a memory and a processor, wherein the memory holds the network topology which is set by the switch, wherein when a failure is detected in one of the computers currently being used, the processor of the management server refers to the memory to change the network topology for the computer where the failure is detected and another computer which substitutes the computer where the failure is detected, and instructs the switch with the changed network topology so as to cause the switch to logically set the changed network topology, and wherein the management server controls the disk of the computer where the failure is detected to be accessible.

Storage switch system, storage switch method, management server, management method, and management program

A computer system including: a plurality of computers having at least one first computer and at least one second computer; a management computer adapted to manage the plurality of computers; and a storage system; the management computer including: a portion adapted to receive network identification information which is set to a network adapter of the first computer; and a portion adapted to transmit the network identification information of the first computer, to the second computer if the management computer receive a request to move a process executing on the first computer; the second computer including: a portion adapted to set the network identification information of the first computer to a network adapter of the second computer; a portion adapted to receive at least one program from a storage area of the storage system corresponding to the network identification information; and a portion adapted to boot the program.

When a failure is detected in a server currently being used, a management server changes the network topology for the server currently being used and another server which substitutes the server. Then, the management server instructs the network SW with the changed network topology so as to cause the network SW to set the network topology logically. In addition, the management server instructs a disk array unit to control accesses from the other server to the disk in accordance with the server where the failure is detected.

Growing community of inventors

Yokohama, Japan

Kouji Masuda