Hitachi, Ltd.

Nec Viewtechnology, Ltd.

Nec Corporation

Teraoka Seiko Co., Ltd.

Tadashi Takeuchi

Masaaki Iwasaki

Takahiro Nakano

Ken Nomura

Masahiko Nakahara

Hiroshi Mine

Damien Le Moal

Sachie Tajima

Aritoki Takada

Shouji Nakamura

Yoshihiro Hayashi

Kazuyoshi Serizawa

Daisuke Yokota

Takaaki Haruna

Shihoko Taguchi

Shinya Kato

Nobuhiro Maki

Kenji Hirose

Koji Watanabe

Yasuhiro Takahashi

Hiroshi Uchida

Wataru Okada

Teruo Tanaka

Takuya Oda

Ikuko Kobayashi

Toshio Denda

Yoshinori Oohira

Ikubo Kobayashi

Damien Lemoal

Kouichirou Mizunashi

Mamoru Adachi

Mizuki Miyanaga

A word extraction assistance system includes: a storage device that stores a document archive that is a subject of following steps, and a dictionary that defines relations between words; and a calculation device that performs the step of comparing a document contained in the document archive with the dictionary, and thus generating candidate-for-structured-data related to relations between predetermined words, the step of performing determination of validity of the candidate-for-structured-data, based on certainty of the candidate-for-structured-data, and the step of adding the candidate-for-structured-data to the dictionary, based on a result of the determination of validity.

Word extraction assistance system and word extraction assistance method

An information processing device specifies a plurality of cooccurrence words common to first and second words, and determines synonymity or relevancy about the first word and the second word based on cooccurrence indices between the specified cooccurrence words and each of the first and second words. More specifically, the information processing device selects, from among the specified cooccurrence words, one cooccurrence word in which at least one of cooccurrence indices between the specified cooccurrence word and the first and second words does not exceed a preset first threshold, and obtains a difference in cooccurrence index between each selected cooccurrence word and each of the first and second words, if the difference exceeds a preset second threshold, the information processing device determines the first and second words as relevant word candidates, and if the difference does not exceed the second threshold, the information processing device determines them as synonym candidates.

Information processing device and information processing method

A computer system holds model management information for managing a model for calculating, based on a feature amount of a process pair generated based on a plan history and formed of two processes, a transition probability of the two processes forming the process pair. The computer system comprises: a transition probability calculating unit uses, in a case of receiving input data including a plurality of target processes, the model management information and a feature amount of a process pair formed of a reference target process and a transition destination target process, to thereby calculate a transition probability of the process pair; and a transition probability modifying unit modifies the transition probability of the process pair determined to be unreliable. The transition probability calculating unit generates a new plan by determining the order of execution of the plurality of target processes based on the transition probability of the process pair.

Computer system, generation method of plan, and non-transitory computer readable storage medium

According to one embodiment, a program executing apparatus includes an event management portion to configure migration timing of the program on the basis of a state of the program being executed at reception of a migration request from the program, and a state transmission portion to migrate state information of the program on the basis of the migration timing configured in the event management portion.

Program executing apparatus and program execution method

The storage system is capable of creating one or more virtual storage subsystems to which virtual resources having logically divided a processing capacity of the physical resources are allocated, and upon creating a virtual volume for receiving I/O requests from the host within the virtual storage subsystem, the virtual storage subsystem allocates the virtual resource to the virtual volume, and when an I/O request to the virtual volume is received from the host, performs processing related to the I/O request using the virtual resource having been allocated. According further to the storage system, after allocating the virtual resource to the virtual volume, the storage system raises a utilization rate of the virtual resource allocated to the virtual volume in a stepwise manner.

Storage system

A simple hypervisor, in addition to a hypervisor, is operated on a computer. A guest OS, the continued operations of which need to be guaranteed, when a fault occurs in the hypervisor is operated on the simple hypervisor, and the other guest OSs are operated on the hypervisor. The hypervisor performs resource scheduling (determining of resources to be allocated to or deallocated from each guest OS) and the simple hypervisor executes, in place of the simple hypervisor, allocation or deallocation of resources to or from the guest OS, the continued operations of which need to be guaranteed.

Computer and hypervisor-based resource scheduling method

A computer system includes: a physical resource including a memory; a virtualization mechanism that provides a virtual computer to which the physical resource is allocated; and a cache state management mechanism that manages a cache state of the virtual computer. The virtualization mechanism provides a first virtual computer and a second virtual computer. The cache state management mechanism manages the cache state of each of the first virtual computer and the second virtual computer. When the cache state management mechanism detects transition of the cache state in a state where a memory area allocated to a cache of the first virtual computer and a memory area allocated to a cache of the second virtual computer include duplicated areas storing same data, the virtualization mechanism releases the duplicated area in one of the first virtual computer and the second virtual computer.

Computer system and memory allocation management method

In a computer system in which a virtualization control unit controls a plurality of virtual machines, if memory is collected regardless of a memory usage status of the virtual machine, cache miss increases and an IO performance of overall system deteriorates. In order to solve this problem, a usage status of a cache region within a memory which is utilized by each OS that the plurality of the virtual machines has, and based on a monitoring result, the virtualization control unit decides an allocation region of the memory as a collection target among the allocation region of the memory already allocated to each OS, and collects the allocation region of the memory as the collection target from the OS as a current allocation destination.

Computer system and memory allocation adjustment method for computer system

A control method for an I/O device, the I/O device being shared by a hypervisor and a first guest OS, the hypervisor comprising a physical driver for using a physical function, the first guest OS comprising a virtual driver for using a virtual function, the control method comprising: a first step of acquiring, by the hypervisor, a state of the I/O device via the physical driver; a second step of monitoring, by the first guest OS, the hypervisor, thereby determining whether the hypervisor has been brought into a predetermined state or not; a third step of activating, by the first guest OS, a sub physical driver for operating the I/O device when the first guest OS determines that the hypervisor has been brought into the predetermined state; and a fourth step of carrying out, by the first guest OS, transmission/reception via a queue set in advance on the memory.

Activating a subphysical driver on failure of hypervisor for operating an I/O device shared by hypervisor and guest OS and virtual computer system

A computer includes first and second processors, first and second I/O devices, a shared memory, and an interrupt controller. The first processor issues a control command for causing the first I/O device to read target data from the first apparatus and store the target data in the shared memory. The first I/O device reads the target data from the first apparatus and, transfers the target data to the shared memory, and generates an I/O complete interrupt. The interrupt controller delivers the generated I/O complete interrupt to the second processor. When the second processor receives the I/O complete interrupt, the second processor issues a control command for causing the second I/O device to read the target data from the shared memory and send the target data to the second apparatus. The second I/O device reads the target data from the shared memory and sends the target data to the second apparatus.

Computer, computer system, and data communication method

An aspect of the invention is a storage control apparatus, comprising a plurality of processors, a memory, an I/O device coupled to a storage device, a virtualization module that allocates a first processor to a first guest and a second processor to a second guest from among the plurality of processors, and an interrupt control module that receives an interrupt from the I/O device and transmits the interrupt to any one of the plurality of processors, wherein the virtualization module comprises, a state detection module that detects at least one of a state of the first guest and a state of the first processor, and an interrupt delivery destination control module that switches the interrupt with respect to the first processor to the second processor when at least one of the state of the first guest and the state of the first processor becomes a predetermined state.

Storage control apparatus

A media delivery apparatus for relaying media data streaming-delivered from a server to a client terminal through a network, including a receiving portion for receiving packets transmitted from the server to the network when stream-delivering the media data, and a storage device, wherein: each of the packets contains at least one media data element as a split of the media data and is constructed according to a certain protocol; and the receiving portion extracts the media data element, generates information necessary for reconstructing a packet having the same construction as that of the packet containing the media data and stores the necessary information in addition to the extracted media data in the storage device.

Media delivery arrangements including time information provided together with media data

A content delivery system includes a delivery server, a storage apparatus having a logical unit for storing data regarding content items, and a management apparatus having a content management unit for managing a delivery server. The delivery server includes a conversion unit and a delivery unit. The conversion units acquires original data regarding a content item from an external origin server in response to a content addition request from the content management unit, converts the original data to data for delivery, and stores the content data for delivery in the first logical unit. The delivery unit reads, in response to a content delivery request from the client, the data for delivery from the logical unit and transmits it to the client.

Content delivery apparatus and content delivery method using the same

A proxy servertransfers, when a protocol header and content specified in a distribution request from a clientare not stored in a storage device, the distribution request to an origin server; stores the protocol header and content, which have been transmitted from the origin server, in the storage device; transmits the protocol header and content to the client; creates another protocol header based on the protocol header transmitted from the origin server; and stores the created protocol header in the storage device. When the protocol header and content specified in the distribution request from the clienthave been stored in the storage device, the proxy serverextracts the protocol header and content from the storage deviceand distributes them to the client

Data transfer method and proxy server, and storage subsystem

A plurality of storage devices are coupled with at least two switch of a switch network that is configured by a plurality of switches that transfer a packet that complies with an IP (Internet Protocol). Moreover, a storage control device is coupled with the switch network. The storage control device builds an LU (Logical Unit) that is utilized by a host device based on at least two storage devices that are coupled with different switches.

Growing community of inventors

Tokyo, Japan

Tadashi Takeuchi