Fujitsu Corporation

Shinji Sumimoto

Kouichi Kumon

Kohta Nakashima

Yuichiro Ajima

When allocating an unallocated queued job, by using a CDA having a mesh structure to which active jobs are allocated, a job scheduling apparatus scans an event list that includes information about allocation events and release events for jobs, determines the coordinates and the time at which submeshes corresponding to the queued jobs are reserved, and arranges the submeshes by overlapping them on the CDA.

Job scheduling apparatus and job scheduling method

A data communications system for a computer system conducting network communications, wherein a communications method is selected and set for conducting the communications (transfer) using an NIC (hardware)or a host processor (CPU) based on communications data length, and furthermore, at this time, the free space status of the NIC memoryis determined, thereby the communications method as to whether, for example, data related to transmission is to be transferred to the NIC memory, or copied to the host memory, can be also appropriately determined.

Data communications method selection by data communication system

A computer system including input/output devices that transfer data and a computer that controls a process using a virtual storage and inputs data to and outputs data from a medium, wherein the input/output devices and the computer include address conversion tables for converting a virtual address into an actual address, the computer requests all the input/output devices to permit page operation such as page-out processing, processing for deleting a virtual address space following termination of a process, and processing for changing a page, the input/output devices perform operation for the address conversion tables in response to a request from the computer and notifies the computer of permission of the page operation, and, when the permission for the page operation is obtained from all the input/output devices, the computer performs operation for the address conversion table and performs page operation.

Input/output device, computer, computer system, input/output control program, OS, page management program, and page management method

In accessing shared data in a shared storage device from a plurality of systems, the access is prevented from concentrating on one system without the necessity of exclusive control such as a lock mechanism, etc. Predetermined shared data in a network is all updated by a predetermined shared data updating unit in a first data processing device. The update result is written by a version data writing unit to the update storage device. If the predetermined shared data is referred to in the predetermined shared data referring unit in the second data processing device, the referring operation is performed by the predetermined shared data reference control unit on the predetermined shared data of one version prior to the latest version in the shared storage device, thereby requiring no lock mechanism.

Device/system for processing shared data accessed by a plurality of data

When amounts of processing of processes to be distributed are known, a scheduler in a client allots the processes in order of their respective amounts of processing to computers in ascending order respective of cumulative amounts of processing of the computer. The cumulative amount of processing in each computer is updated by adding the amount of processing of the allotted process to the cumulative amount of processing of the computer each time a process is allotted to a computer. Each computer supplies situation data such as usage, together with reliability thereof to a server which distributes computers, and the server allots usable computers to the client on the basis of these data. The agent of each usable computer supplies a resource use token to the client so as to permit exclusive use of a computer resource.

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Kawasaki, Japan

Shinji Sumimoto