Nec Corporation

Satoshi Hieda

Satoshi Uchida

Junichi Yamato

Takayuki Hama

A communication system comprises control devices, and forwarding nodes each includes packet processing unit that performs processing of a received packet based on a processing rule set in advance or received from control device associated with the node. First control device among the control devices, in response to a predetermined trigger, refers to correspondence between forwarding nodes and control devices, and transmits, among forwarding path information, at least forwarding path information that includes a forwarding node associated with the first control device, to second control device associated with a forwarding node that is not associated with first control device, among forwarding nodes on a forwarding path of the received packet. Second control device generates and sends the processing rule to a forwarding node on the forwarding path, among forwarding nodes associated with the second control device, based on the forwarding path information.

Communication system, control device, processing rule setting method, packet transmission method, and program

A distributed storage system includes: a plurality of servers that store data that is associated with key information, respectively; a packet forwarding apparatus that, on receipt of a new packet that contains the key information and is addressed to one of the plurality of servers, requests a control apparatus to decide a forwarding destination from among the plurality of servers; and the control apparatus. The control apparatus includes: a forwarding destination selection section that decides a forwarding destination of the packet based on key information in a header part of the packet; and an entry setting section that sets, in a packet forwarding apparatus(es) on a path to the forwarding destination, a flow entry for forwarding a subsequent packet(s) with same key information to the forwarding destination. The packet forwarding apparatus(es) forwards a packet(s) with the same key information to the forwarding destination using the set flow entry.

Distributed storage system, control apparatus, client terminal, load balancing method and program

An information processing device includes an access requesting unit, an access type determination unit, a notified party information acquisition unit, and a notifying unit. The information processing device is able to access a notified party information storage unit that stores information of a notified party in association with location information of particular data stored in a database server. The access type determination unit determines whether or not an access request issued by the access requesting unit is an access request relating to updating. If the issued access request is an access request relating to updating, the notified party information acquisition unit acquires information of a notified party corresponding to location information of data to be updated by the access request, from the notified party information storage unit. The notifying unit gives notice to a notified party specified in the acquired information of the notified party.

Database update notification method

A CPU emulation system includes; a plurality of virtual CPUs each operating on a different physical CPU; an instruction sequence selecting section for selecting an instruction sequence to be optimized; a virtual CPU selecting section for selecting one of the plurality of virtual CPUs, which is to perform optimization processing of the selected instruction sequence, based on usage rates of the plurality of virtual CPUs; and an optimization level selecting section for determining an optimization level of the optimization processing that is to be executed by the selected one of the plurality of virtual CPUs, and giving a direction to perform the optimization processing to the selected one of the plurality of virtual CPUs.

CPU emulation system, CPU emulation method, and recording medium having a CPU emulation program recorded thereon

An access right checking method conducts an access right check on a request destination OS (Operating System) according to a right of a subject executed on a requestor OS when the subject issues an access request to access the object, the subject being an access main body on the requestor OS. A first step causes the request destination OS to execute the access request from the requestor OS on the request destination OS by proxy. A second step causes the request destination OS to acquire the subject information on the subject executed on the requestor OS. A third step causes the request destination OS to convert the subject information to be allocated to access request proxy means. A fourth step causes the request destination OS to check whether the access request at the second step has a right to access the object.

Access right checking system, access right checking method, and access right checking program

A memory-use-information memory area stores therein a program ID, a request-source memory address, a request memory size which configure information for uniquely identifying a program file loaded into a storage area for virtual machine-A or storage area for virtual machine-B in association with a physical memory address. A memory reservation section uses, as the retrieval key, the program ID, request-source memory address, and request memory size of a program file corresponding to a memory reservation request to retrieval the memory-use-information memory area. When a entry that matches said retrieval key exists, the memory reservation section allows sharing of the memory area between a plurality of virtual machines.

Memory sharing system

An environment information distribution unit transmits a policy ID for specifying an access policy to be applied to a terminal device. An environment information reception unit notifies an access policy application management unit of a policy ID specified based on information received from the environment information distribution unit. The access policy application management unit specifies a relevant access policy from an access policy storage region which stores at least one access policy based on a notified policy ID to notify an access control management unit in an OS of information designating the access policy. The access control management unit determines whether to allow or not to allow a request from a subject to access an object based on a specified access policy.

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Tokyo, Japan

Satoshi Hieda