Hitachi, Ltd.

Hitachi Software Engineering Company, Ltd.

Hitachi Electronics Services Co. Ltd.

Jun'ichi Kurihara

Toshio Hirosawa

Ikuo Kimura

Minoru Shibamiya

Hitoshi Ueno

Motohide Kokunishi

Akira Ando

Masahiko Ishimaru

Yoshikazu Ichikawa

Shigemi Okumura

Tsutomu Itoh

Masaaki Hama

Hideki Nanba

Kozi Miyazima

Yoshimasa Yamamoto

A control method and apparatus for dynamically switching a logical session in an information processing system having a network control system configuration in which a plurality of terminal devices are connected to a plurality of central processing units via at least one communication control processor. The communication control processor comprises stores histories of command data transactions corresponding to the respective terminal devices, and retrieves the histories of transactions of the terminal devices connected logically to a central processing unit to be replaced when switching from the central processing unit to be replaced to another central processing unit is performed, delivers to the processing unit to be replaced command data to disconnect logical connective relationship from the central processing unit to be replaced, and establishes logical connective relationship to the another central processing unit, and for automatically delivering the retrieved histories of the transactions to the another central processing unit.

Control method and apparatus for dynamically switching a logical session

Method and system for identifying history of console devices capable of rapidly analyzing and determining a factor of obstacle of a computer system due to misoperation of a console device in the computer system comprising at least one central processing unit including a computer, a main console device connected thereto and a plurality of sub-console devices for controlling the operation of the computer. History of the console devices as to which one of the sub-console devices command data has been issued from and/or which one of the sub-console devices command data has been sent to is examined to analyze and determine the factor of computer system obstacle.

Method and apparatus for monitoring communication between a computer and

System for dynamically switching logical sessions between terminal

A job execution prediction control method and apparatus in a computer system having a CPU. Information on processing amounts of a plurality of parallelly executed jobs is collected during execution of the respective jobs. Predicted execution end times of the respective jobs are calculated on the basis of the collected information. Subsequent processing speeds of the respective jobs are controlled on the basis of the predicted execution end times calculated for the respective jobs and target execution end times of the respective jobs.

Method and apparatus for job execution prediction and control and method

An automatic operation control system for controlling the automatic operation of a computer system, stores in a storage unit the status informations of hardware configuration and software configuration of a computer system, a running event of the operating system and application programs, and an operation event of the computer system, and supplies a procedure for an operation command to be executed in accordance with the configuration information and the occurred event.

Operation control technique for computer system by driving a command

An operation monitoring and controlling apparatus for a computer system consisting of a central processing unit, input/output devices, terminals, and a service processor connected to the central processing unit, and including a supervising device for supervising the status of use of the input/output devices and the terminals; a first control device for putting the power supply of the central processing unit either in an on-state or in an off-state; a device for sending a data stream of operator commands, which an operator has inputted, to the service processor; and a second control device, to which a power-off instruction or a power-on instruction, which the operator has inputted is sent the second control device responding to a signal from the supervising device, generating a data stream of operator commands for starting an operating system running under the computer system, which is supplied to the service processor, at the same time generating a power-on signal, which is supplied to the first control device, or generating automatically a data stream of operator commands for stopping the operating system, which is sent to the service processor, and generating a power-off instruction for the first control device, which is supplied to the first control device.

Operation monitoring and controlling apparatus for computer system

A control apparatus for realizing remote operation control for a computer system is interposed between the Computer system and a master console for supervising data stream on a data transmission/reception signal line existing between the computer system and the master console. Occurrence of error in the computer system is messaged to a remote terminal through a public telecommunication line. Commands for the computer system can be inputted from the remote terminals.

Remote operation control for computer system

Fault monitoring/controlling apparatus and method for a data processing system comprises one or more computer systems, monitor and control apparatuses connected thereto for monitoring and controlling the associated computer systems and a single supervision/control system provided at a site remote from the computer systems. When abnormality taking place in the computer system is decided as a fault, report of the fault occurrence is automatically effectuated to the remotely located supervision/control system, which responds to the reception of the fault report and issues, if necessary, a command requesting additional supply of detailed fault information to the computer system suffering the fault. The additional fault information is comparatively collated with the fault information accumulated (precedents). When a reference precedent which coincides with the fault occurring currently is found to be present as the result of collation, a recovery procedure is generated on the basis of the precedent data to be subsequently transmitted to the computer system of concern. A plurality of computer systems can be monitored in a consolidated manner, wherein fault taking place in the computer systems can be removed rapidly through diagnosis and execution of appropriate procedure.

Monitoring and controlling system and method for data processing system

In a computer network system in which a plurality of computer systems managed by different managers are connected, each computer system in the network system is provided with a group of tables for storing the characteristics of computer systems in the network system with which the site of that computer system is communicatable, the cumulative total of account information when that computer system requested the execution of jobs to another site, the cumulative total of account information when the site of that computer system executed jobs requested from another site, and the calculated value of the balance of accounts between the site of that computer system and each site in correspondence to each of sites in the network system and is also provided with a group of processing programs. When the site of that computer system requests the execution of a job to one of the other sites, the site of that computer system examines the calculated value of the balance of accounts between the site of that computer system and each of the other sites so that a site to which the execution of the job is to be requested is selected on the basis of the balance of accounts between the site of that computer system and the other site.

Control method and apparatus for computer network system

A control method and apparatus for dynamically switching a logical session in an information processing system having a network control system configuration in which a plurality of terminal devices are connected to a plurality of processing units via at least one communication control processer. The communication control processor includes storage area for storing histories of command data transactions corresponding to the respective terminal devices, and retrieves the histories of command data transactions of the terminal devices connected logically to a processing unit to be replaced when switching from the processing unit to be replaced to another central processing unit is performed, delivers to the processing unit to be replaced command data to disconnect logical connective relationship from the processing unit to be replaced, and establishes logical connective relationship to the replacing processing unit, and for automatically delivering the retrieved histories of the command data transactions to the replacing processing unit.

Network control system for dynamically switching a logical connection

At an occurrence of an interrupt, each entry of the vector table of the vitrual machine monitor to be referenced by the hardware of the bare machine is loaded with an address of an interrupt processing program of the running virtual machine for an interrupt number associated with the entry. When the interrupt is allowed to be directly processed by the virtual machine, the virtual machine monitor is not activated, that is, the interrupt processing program of the vitual machine can immediately execute the necessary processing, which eliminates the overhead associated with the intervention of the virtual machine monitor. Moreover, the content of the system stack pointer is set to point to the stack of the running virtual machine. Consequently, the content of the registers to be saved for an interrupt processing are directly stored in the stack of the running virtual machine, and therefore the overhead caused because the stack of the virtual machine monitor is used is removed.

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Mitaka, Japan

Jun'ichi Kurihara