Nec Corporation

Teruyuki Baba

Jun Suzuki

Youichi Hidaka

Takashi Yoshikawa

Masahiko Takahashi

Junichi Higuchi

Nobuharu Kami

A network system of the present invention includes a computer and a device connected via a network, and a system management device. The computer and the device include, respectively, bridges that encapsulate transmission/reception data transmitted and received to and from each other and transmit and receive the data to and from each other via the network. Each of the bridges includes a control data transmitting means for generating control data for controlling the state of the system based on control auxiliary data issued from the computer or the device and used for controlling the state of the system, and transmitting the control data to the system management device via the network. The system management device includes a system controlling means for controlling the state of the system in accordance with the control data received thereby.

Network system

A CPUcontrols data transfer from a first device to a second device in a kernel mode. A main memorystores data to be transferred from the first device to the second device. The CPUhas: a first device control meanswhich controls the first device; a second device control means which controls the second device; and a data transfer control meanswhich makes a read instruction which instructs the first device control meansto store data read from the first device in the main memory, and makes a write instruction which instructs the second device control meansto write the data stored in the main memoryin the second device.

Data control system, data control method, and data control program

An object of the present invention is to suppress a variation in virtual machine startup times when multiple virtual machines are started in a computer system having multiple virtual machine providing servers. Execution server distribution unitreferences a virtual machine status management table, which stores the status of virtual machine providing serversin which virtual machinesare operating and the status of the virtual machines, and determines the positions of virtual machines in such a way that virtual machines, which execute specific processing (virtual machine startup, and so on) registered in a distributed processing specification table, are distributed. Operation server consolidation unitreferences the virtual machine status management tableand determines the arrangement of the virtual machinesin such a way that virtual machines, which have executed the specific processing and are performing usual operations, are consolidated (FIG.).

Virtual machine management via use of table in which virtual machine information is registered on a time basis

A performance evaluating apparatus includes a selector, a first performance value calculator, and a second performance value calculator. The first performance value calculator calculates a first performance value based on first partial process execution time tcpu in which a first processor performs a first partial process and a second partial process execution time tdisk in which a second processor performs a second partial process. The second performance value calculator calculates a second performance value based on the first partial process execution time and the predetermined upper limit executable time ratio &#x3b1;. The selector selects either the first performance value or the second performance value as the performance value based on the upper limit executable time ratio, the first partial process execution time, and the second partial process execution time.

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Tokyo, Japan

Teruyuki Baba