Abstract: Any one of a first storage area and a second storage area, in which redundant data are respectively written, is set as a reference storage area, reference data are read in accordance with a request from the storage area set as the reference storage area between the first storage area and the second storage area, and, when update data are received from an external storage device, information based on the update data is written in the storage area not set as the reference storage area between the first storage area and the second storage area and the information based on the update data is written in the storage area set as the reference storage area.

Abstract: According to one embodiment, a DB integration device includes a receiver and a designator. The receiver is configured to receive at least a request for combining first data and second data. The designator is configured to designate, from among a plurality of DB systems, a DB system for executing a combining process of combining the first data and the second data on the basis of combining capability information. The combining capability information indicates at least one of: whether or not a first DB system is capable of reading the second data from a second DB system and executing the combining process; and whether or not the first DB system is capable of causing the second DB system to read the first data.

Abstract: A database management device, a database management method, and a storage medium capable of improving convenience are provided. A first write manager of a database management device writes data for which a write instruction has been issued from a client to a first storage area of a storage unit. A second write manager writes WAL data corresponding to the write instruction from the client to any address in a second storage area of the storage unit. A determiner determines whether or not to write the WAL data to the second storage area for each transaction process. A transaction manager causes the first write manager to write the data and causes the second write manager to write the WAL data if the determiner determines to write the WAL data and causes the first write manager to write the data if the determiner determines not to write the WAL data.

Abstract: A KVS data processing unit, upon receiving a KVS type command of a database system in which index data and actual data are stored in a pair, manipulates data stored in a storage device based on said command. An SQL command execution unit, upon receiving an SQL command, serializes this command, generates KVS type data, and passes this data to the KVS data processing unit. A KVS command processing unit, upon receiving a KVS command, serializes this command, and transmits this data to the KVS data processing unit.

Abstract: A multi-branch determination syntax optimization apparatus includes: a memory that retains multi-branch determination syntax including tokens; a database that retains (1) CPU performance information being a parameter depending on a CPU incorporated in the multi-branch determination syntax optimization apparatus and set based on time required for multi-branch determination processing and (2) frequently-appearing token table representing types and rates of appearance of tokens sorted in order of appearance frequency in a query that statically analyzes a source code and performs lexical analysis in advance; and a conversion section that executes determination for the multi-branch determination syntax by referring to the CPU performance information and the frequently-appearing token table, and creates a branch code converted to make a speculatively executable branch for the token type having a high frequency of appearance and to make a branch using the jump table for the token type having a low frequency of appea

Abstract: A storage system includes a plurality of storage devices, and a server including a memory and an interface. The server is configured to store, in the memory, each of data pieces that are received through the interface from a client as a series of data to be written, in association with a single write command or a series of write commands received through the interface from the client, for each data piece, determine a target storage device and a logical address thereof at which the data piece is to be written, based on an identifier of the data piece received in association with the data piece through the interface from the client, and carry out, in parallel, writing of the data pieces stored in the memory at the determined logical addresses.

Abstract: A storage system includes a storage unit having a plurality of routing circuits electrically networked with each other, each of the routing circuits being locally connected to a plurality of node modules, each of which includes nonvolatile memory, the plurality of node modules forming at least first and second storage regions, and a plurality of connection units, each connected to one or more of the routing circuits, and access the first and second storage regions through one or more of the routing circuits in accordance with a command. When one of the connection units receives a command to write second data into the first storage region while first data are being read out from the first storage region, said one of the connection units writes the second data into both the first and second storage regions.

Abstract: According to one embodiment, there is provided a database system in which a database server and a storage are connected via a communication line. The storage includes a data area, a transaction information storage area, a journal log storage area, and a first circuit. The database server includes a second circuit. The second circuit writes transaction information into the transaction information storage area determined from a combination of the subject database server and a unit of division of processing executing transaction processing.

Abstract: A multi-branch determination syntax optimization apparatus includes: a memory that retains multi-branch determination syntax including tokens; a database that retains (1) CPU performance information being a parameter depending on a CPU incorporated in the multi-branch determination syntax optimization apparatus and set based on time required for multi-branch determination processing and (2) frequently-appearing token table representing types and rates of appearance of tokens sorted in order of appearance frequency in a query that statically analyzes a source code and performs lexical analysis in advance; and a conversion section that executes determination for the multi-branch determination syntax by referring to the CPU performance information and the frequently-appearing token table, and creates a branch code converted to make a speculatively executable branch for the token type having a high frequency of appearance and to make a branch using the jump table for the token type having a low frequency of appea

Abstract: A KVS data processing unit, upon receiving a KVS type command of a database system in which index data and actual data are stored in a pair, manipulates data stored in a storage device based on said command. An SQL command execution unit, upon receiving an SQL command, serializes this command, generates KVS type data, and passes this data to the KVS data processing unit. A KVS command processing unit, upon receiving a KVS command, serializes this command, and transmits this data to the KVS data processing unit.

Abstract: To provide a neighbor searching apparatus that can select an index suitable for each search target. A neighbor searching apparatus has: a storage part that stores a meta table containing index-dependent meta data associated with a data structure of each index; a database managing part that searches for an index associated with an instruction when receiving the instruction from a user and makes an indexing part perform a processing associated with the instruction using the index-dependent meta data associated with the index; and the indexing part that performs the processing associated with the instruction using the index-dependent meta data based on the instruction from the managing database part.

Abstract: An information collection apparatus which collects, from a plurality of devices each having a plurality of states including a power-supply state indicating ON or OFF of a power-supply, state information indicating a state of each device, the apparatus (a) stores, in a first memory, the power-supply state of each device, (b) receives state information transmitted from each device whose state is changed, (c) rewrites, when a power-supply state information indicating the power-supply state is received, the power-supply state stored in the first memory in accordance with the obtained power-supply state information, (d) collects periodically the state information from each device whose power-supply state stored in the first memory is ON by issuing, at regular intervals, a first request for the state information to the device, and (e) transmits the state information collected periodically to an external apparatus.