Hitachi, Ltd.

Yuji Tsushima

Toshiomi Moriki

Keitaro Uehara

Naoya Hattori

Takashige Baba

Hideya Akashi

Toru Shonai

Hitoshi Hayakawa

Tsuyoshi Tanaka

Takeki Yazaki

Daisuke Ito

Masaki Yamada

Naoki Hamanaka

Yoshiko Yasuda

Michitaka Okuno

Tsunehiko Baba

Yuji Ogata

Jun Okitsu

Tetsuhiko Okada

Yoshiko Tamaki

Masamori Kashiyama

Yoshikazu Tanaka

Tadayuki Sakakibara

Hidetaka Aoki

Daisuke Yoshida

Shinji Nishimura

Daisuke Ishii

Kentaro Shimada

Shigeo Nagashima

Kazuhiko Mizuno

Yonetaro Totsuka

Satoshi Muraoka

Nobuyuki Muranaka

Nodoka Mimura

Yuta Sawa

Takuichi Hoshina

Isao Ohara

Atsushi Nakajima

Kozo Ikegami

Masanao Ito

Kazuhide Horimoto

Hiroyuki Mitome

Yoshinori Wakai

Masaru Koyanagi

Disuke Yamane

An analysis apparatus comprises: a processor; and a storage device that stores a prediction model that predicts results for contributing factors of a group of events, wherein the processor executes: a prediction error calculation process in which, on the basis of a first prediction value attained by providing the prediction model with a first appearance frequency for contributing factors of a first event among the group of events, and results corresponding to the first appearance frequency, a prediction error of the first prediction value is calculated; and an error factor extraction process in which, on the basis of a correlation between a second appearance frequency for a contributing factor of a second event among the group of events and the prediction error calculated by the prediction error calculation process, an error factor of the prediction error is extracted from among the contributing factors of the first event.

Analysis apparatus, analysis method, and analysis program for calculating prediction error and extracting error factor

In the sensor data retrieval system, a gateway connected to a plurality of sensor devices collects sensor data including measurement values and time stamps and stores them in a temporary storage part, and the management computer collects sensor data and stores sensor data in the first storage part, the management computer updates the collected time for each gateway as the first time, registers the sensor data of the first storage part in the second storage part in the registration cycle, the search part which updates the latest time stamp among the time stamps of the registered sensor data for each gateway with the second time as the second time and accepts the search period and searches for the sensor data of the time stamp included in the search period, and the search upper limit time from the search period, and compares the second time with the search upper limit time.

Sensor data search system, sensor data search method and management computer

When detecting the configuration change or the operating state of a virtual machine of the main system, a VM management unit changes a value of a determination index of the virtual machine, and selects a virtual machine of the standby system/auxiliary system used for failure recovery of the virtual machine of the main system on the basis of a value of the determination index. A pattern generation unit provides the virtual machine of the standby system/auxiliary system selected by the VM management unit.

Failure recovery system and method of creating the failure recovery system

An information processing unit of a communication apparatus includes a non-volatile memory and a volatile memory. A control unit of the communication apparatus loads the boot image from the non-volatile memory to the volatile memory upon activation of the communication apparatus, activates the virtual machine template in the loaded boot image on the volatile memory, deactivates the activated virtual machine template after reconfiguring the activated virtual machine template to minimum required configuration to execute a virtual machine. Upon receipt of a request for addition of communication service, the control unit creates a replicate virtual machine template by replicating the deactivated virtual machine template, activates the replicate virtual machine template, reconfigures the activated replicate virtual machine template to configuration according to the request for addition of communication service, and executes the reconfigured replicate virtual machine template as a virtual machine to provide the communication service.

Communication apparatus and configuration method

A next-generation OS with a virtualization feature is executed as a user program on a first virtual processor by selecting, in response to a cause of a call for a host VMM, one of a guest status area () for executing a user program on a second virtual processor and a host status area () for executing the guest VMM, and by updating a guest status area () of a shadow VMCS for controlling a physical processor. Accordingly, without a decrease in performance of a virtual computer, the next-generation OS incorporating the virtualization feature is executed on a virtual server, and the next-generation OS and an existing OS are integrated on a single physical computer.

Method for controlling a virtual machine and a virtual machine system

Provided is a virtual machine including a first virtualization module operating on a physical CPU, for providing a first CPU, and a second virtualization module operating on the first CPU, for providing second CPU. The second virtualization module includes first processor control information holding a state of the first CPU obtained at a time of execution of the user program. The first virtualization module includes second processor control information containing a state of the physical CPU obtained at the time of the execution of the second virtualization module, third processor control information containing a state of the physical CPU obtained at the time of the execution of the user program, and prefetch entry information in which information to be prefetched from the third processor control information is set, and, upon detection of a event, the information set in the prefetch entry information is reflected to the first processor control information.

Virtual machine control method and virtual machine system using prefetch information

A virtual machine control method and a virtual machine having the dual objectives of utilizing NIC on a virtual machine that creates sub-virtual machines operated by a VMM on virtual machines generated by a hypervisor to avoid software copying by the VMM and to prevent band deterioration during live migration or adding sub-virtual machines. In a virtual machine operating plural virtualization software on a physical machine including a CPU, memory, and multi-queue NIC; a virtual multi-queue NIC is loaded in the virtual machine, for virtual queues included in the virtual multi-queue NIC, physical queues configuring the multi-queue NIC are assigned to virtual queues where usage has started, and the physical queues are allowed direct access to the virtual machine memory.

Virtual machine control method and virtual machine

Network equipment has multiple ports each performing transmission/reception of a frame, and a control unit that when the frame received through the port is an command of temporal suspension, temporarily suspends transmission of the frame from the port until a predetermined time elapses and after the predetermined time elapsed, alters the transmission bandwidth of each traffic about a communication path corresponding to the frame according to a variation of an interval at which the command of temporal suspension is received.

Network equipment and frame transmission control method

In an exemplary computing machine of the invention, a shared IO device used by a first virtual machine and the second virtual machine includes a physical IO device and a virtual IO device controlled by the physical IO device. In the case of detecting that the first driver has transmitted a stop signal for stopping the physical IO device, a hypervisor keeps the stop signal from being transmitted to the shared IO device, determines whether or not a processing request transmitted by the second driver to the virtual IO device has been completed, and stops the physical IO device with the completion of the processing request as a trigger.

Virtual machine, virtual machine system and method for controlling virtual machine

In order to provide an interface of acquiring physical position information of an I/O device on a virtual machine monitor having an exclusive allocation function of the I/O device and optimize allocation of a resource to a virtual server by using the acquired physical position information, a virtual machine monitor includes an interface of allocating a resource in accordance with a given policy (a parameter of determining to which a priority is given in distributing resources) for an I/O device, a CPU NO., and a memory amount request to guest OS. Further, the virtual machine monitor includes an interface of pertinently converting physical position information of the resource allocated by the virtual machine monitor to notice to guest OS.

Virtual machine monitor and multiprocessor system

In a distributed information communication processing system in which a plurality of information communication devices provides a service through a network, response speed, electric power consumption, and further reliability are improved. The distributed information communication processing system which provides various services is configured by associating an entrance node (EN) which executes filtering near sensors, actuators, and terminals being information sources, an intelligent node (IN) which changes an information processing position and executes information processing and communication processing instead of a data center (DC), and a management node (MN) which manages these nodes. Thereby, real time type information processing can be realized.

Information and communication processing system, method, and network node

A system permitting alteration of the information processing position, where an existing information system is used, while minimizing alterations in configuration or the like, is to be provided. Intelligent nodes each having an information processing section and any desired address altering section are arranged on boundaries of a network where packets are likely to pass. This node has a flow table for recognizing as a flow a group of packets transmitted from each user's terminal, a flow status table for determining the connection state and the next destination address or the final destination address of each flow, and a module to observe the loaded state of its own information processing function. It rewrites the destination address of any flow not in a connection-established state in the flow status table to a less loaded one out of its own information processing function section or external information processing apparatus.

Distributed router computing at network nodes

The program attains compatibility of suppression of an overhead accompanying page exception handling in the case of operating a program whose amount of memory use is large on a virtual machine and suppression of the overhead accompanying page exception handling in the case of operating a first OS that has a function of making another OS run on a virtual machine. A VMM creates a shadow PT (Page Table) for prohibiting reading-writing of privileged memory that requires emulation of reading/writing by using a RSV-bit, and registers the shadow PT and the second PT that a second OS operating on the first OS has in an x86 compatible CPU equipped with page exception detecting function using two PT's. When a page exception occurs, the VMM refers to cause code of the page exception and, when a P field of the cause code is 0, determines immediately that emulation is unnecessary.

Virtual machine control program and virtual machine system

It is provided a computer system including computers, PCI switches each having first and second ports, a switch management module and a power control module. The switch management module includes an identifying module for identifying a first port coupled to the computer to be booted up, and notifying the PCI switch of the first port, an instruction module for instructing the power control module to boot up the computer, and an allocation management module for managing allocation of one of the I/O device to the computer and notifying the one of the PCI switches of the allocation after the computer is booted up. The PCI switches includes a preventing control module for preventing the computer from detecting a configuration of the first port, and a virtual switch generating module for generating a virtual switch that couples the first port and the second port based on the notification.

Computer system, method of managing PCI switch, and management server

Growing community of inventors

Hachioji, Japan

Yuji Tsushima