Hitachi, Ltd.

Yoji Ozawa

Hideki Okita

Eri Kawai

Akihiro Koizumi

Jun Nakajima

Daisuke Matsubara

Takashi Sumiyoshi

Hitoshi Yabusaki

Takayuki Nagai

Yukio Ogawa

Yukiko Takeda

Yoshiko Yasuda

Kazuma Yumoto

Kazuhiro Maeda

Junji Kinoshita

Tatsuhiko Miyata

Yosuke Himura

Nao Nishijima

Ken Akune

Koshi Ikegawa

A method includes: determining presence or absence of duplication processing by a node, the node constituting each of a plurality of distributed ledger systems and managing identification information of call processing from a program on another distributed ledger system; and executing the call processing after deduplication of the call processing is executed based on a specific policy.

Inter-system linking method and node

A data migration systemincludes: a management serverconfigured to obtain transaction information from a distributed ledger at a data migration source, and transmit a migration transaction to a distributed ledger node at a data migration destination, the migration transaction specifying a transaction ID indicated by the transaction information obtained; and the distributed ledger nodeconfigured to receive the migration transaction, obtain transaction information in the distributed ledger at the data migration source based on the transaction ID, extract data on a predetermined processing result from the transaction information obtained, execute a transaction using the extracted data as an argument, and transmit a result of the executed transaction to a transaction distribution nodeat the data migration destination.

Data migration method, data migration system, and node

A distributed ledger management systemincludes: an orderer nodethat generates a block containing transactions issued by a client, verifies the validity of the transactions contained in the block, distributes the block and verification results to a peer node, adds the block to a blockchainin its storage device, and stores the verification results in its storage device; and the peer nodethat receives the block and verification results from the orderer node, adds information on predetermined events indicated by the transactions to state informationin a storage device of the peer node, and discards the block and verification results.

Distributed ledger management system, distributed ledger management method, and node

An information processing system includes a plurality of distributed ledger nodes provided to a plurality of organizations, and configured to verify a content of a transaction with each other and hold a history of the transaction in distributed ledgers provided to the organizations, a client node configured to transmit the transaction to the distributed ledger nodes, and a plurality of processing nodes provided to the organizations, and configured to execute verification target processing being processing that is targeted for verification on a virtual platform. The client node selects the distributed ledger nodes to perform the verification of the verification target processing and transmits the transaction including a request to execute the verification target processing to each of the selected distributed ledger nodes. When each selected node receives the transaction, the distributed ledger node causes the processing node in the organization to perform the verification and records the verification result.

Information processing system and method of controlling information processing system

A communication disabled time during a network failure can be shortened. An SWcapable of generating a layerpacket from a received layerframe and transmitting the generated layerpacket includes: a plurality of portswhich is capable of transmitting and receiving data; a layerring processing unitwhich detects a failure of a networkconnected via the portsand a VXLAN processing unitwhich generates a plurality of layerpackets from one layerframe received via the portswhen the failure of the networkis detected by the layerring processing unitand transmits the generated plurality of layerpackets to a network via the plurality of ports

Network relay device, network relay method, and network relay program

A log message grouping apparatus calculates a coincidence degree evaluation value E1 representing the degree of coincidence between minority words, which are relatively low occurrence frequency words, out of the words that form a log message and minority words in another log message. The log message grouping apparatus further calculates an occurrence degree evaluation value E2 representing the degree of occurrence of the combination of a classification value of a log message and the classification value of a past log message on the basis of the occurrence frequency of the combination of the classification values and calculates an association degree evaluation value E3 representing the degree of association between the log message and the past log message on the basis of the coincidence degree evaluation value E1 and the occurrence degree evaluation value E2.

Log message grouping apparatus, log message grouping system, and log message grouping method

A management server which manages a tenant pattern being information for forming a tenant being an application system for executing a predetermined application by using computer resources within a computer system, the tenant pattern including a configuration item and an ID pool, the management server having: pattern parts information for managing the configuration item as a pattern part that forms the tenant pattern; validation rule information for storing a detail of validation processing for a composition of the tenant pattern; and the management server further comprising: a tenant pattern generation unit; a tenant designing unit for designing a composition of the tenant, and generating a configuration detail for actually building the tenant on the computer system; and a validation execution unit for executing the validation processing for the tenant pattern and the configuration detail based on the validation rule information.

Management server, tenant pattern validation method, and computer system

A network system, management server, and OAM test management method for grouping the virtual networks, selecting a test target for each group, and lowering the network load and the operating load in the OAM testing. Grouping the multiple virtual networks based on their physical topology and selecting a representative virtual network for each group, allows selecting a test target virtual network from among the representative virtual networks for the virtual network selected by the operator and executing tests.

Network system, network management server, and OAM test method

A network system configured from a test device that executes a test including a continuity test and a performance test of a network configured from a plurality of transfer devices and a management server that requests an execution of the test for the test device, in this way, one or more backup session used for executing the test is selected from a plurality of sessions, the test is executed for a processing interval in a success, a next test is executed by the backup session when the processing time for the test exceeds over a specified time, thereby, a large number of tests can be executed and the test can be executed regularly even when the processing time becomes longer caused by a failure etc.

Network system and management server

A reservation processing is executed according to the configuration request to VPN and network device to inform a user's terminal of scheduled period. In a network system including plural network devices for transmitting a packet and a management server, plural logical networks (VPNs) are formed on the plural network devices. The management server receives a configuration request including configuration data for VPN and configuration desired time from a user's terminal to generate the configuration data for the network device from the configuration data for the VPN. The management server refers to a configuration reservation table to confirm whether free time is available in the same period about all target network devices. If free time is available, the management server makes configuration reservation and configures the target network device in the reserved time. The management server notifies the user's terminal of the reserved time.

Network system, network management server, and configuration scheduling method, using summed processing time

A transport control server coupled to a plurality of nodes in a network through which a plurality of traffics passes through is provided. The transport control server is configured to receive bandwidth information from each of the nodes when the traffics pass through the nodes. For each of the traffics, the transport control server calculates bandwidths at an entry edge node and at an exit edge node based on the received bandwidth information. The transport control server defines as a first traffic, based on the calculated bandwidths at the entry edge node and the exit edge node, a traffic having a discarded bandwidth that is larger than a first predetermined bandwidth. Also, the transport control server defines as a second traffic, based on the received bandwidth information, a first traffic having a bandwidth at the two or more nodes that exceeds a specified second bandwidth.

Transport control server, transport control system, and transport control method

A transport control server () wherein a conversion table including a pre-conversion identifier and a post-conversion identifier, and a conversion type indicating the aggregate/transfer of a path are previously stored for each two segments that are connected to each other. When devices () at the endpoints of the path are specified, the transport control server () calculates the route between the devices to identify one or a plurality of gateway nodes (to) on the route. Also, the transport control server () acquires from a storage unit the pre-conversion identifier, post-conversion identifier, and conversion type corresponding to two segments that are connected by the identified nodes for each of the identified nodes, and sets the acquired identifiers and conversion type to each of the nodes. Each of the nodes encapsulates and transmits a received packet including the set pre-conversion identifier using the set post-conversion identifier, or replaces the set pre-conversion identifier with the set post-conversion identifier and transmits the post-conversion identifier in accordance with the set conversion type.

Transport control system and transport control server

Provided is a management computer which reduces the workload of an administrator of a network in setting node when the normal network is changed to a network with redundancy. The management computer manages a plurality of nodes that constitute a network accommodating VLANs. The plurality of nodes include a first node and a second node which make a redundancy pair and which divides the network into an active path and a standby path. The management computer stores port management information showing connection relations for respective nodes and identifiers of VLANs allocated to ports of the nodes, and creates the redundancy pair by updating the port management information of the first node such that a VLAN allocated to one of ports of a connected node that is connected to the first node is allocated to one of ports of the first node that is connected to the connected node.

Management computer for setting configuration information of node

When a failure occurs in a network or in a network apparatus, a connection state of the network is changed. There is provided a network configuration estimating apparatus for knowing logical route information quickly after a failure occurrence in accordance with information collected from network apparatuses, although it is conventionally difficult to know this information quickly. The network configuration estimating apparatus executes: a process of generating network configuration information such as physical and logical topologies from information collected in advance; a process of monitoring a network failure; a process of calculating a network configuration to be estimated after a network failure occurrence, from the network configuration information generated in advance and network failure information; a process of visually displaying the calculated network configuration; and a process of managing history of calculated network configurations.

Apparatus and system for estimating network configuration

Provided is a network system, comprising: a plurality of network devices; a network constructed from the plurality of network devices; and a management server managing the network. The plurality of network devices include a first network device in which a filter assigned as a target of reconfiguration is set and a second network device coupled at a lower level of the first network device. The management server obtains topology of the network from the plurality of network devices; reconfigures, by referring to the obtained network topology, the filters of the first and second network device such that a range in which a packet can be forwarded through a reconfiguring filter set in the first network device is made equal to a range in which a packet can be forwarded through the filter set in the second network device; and sets the reconfigured filters into the network devices.

Growing community of inventors

Tokyo, Japan

Yoji Ozawa