Abstract: A content acquisition device includes a processor that executes a procedure. The procedure includes: referencing other device holding information in which identification information of another device is associated with the oldest sequence information, making a request to a device indicated by device identification information included in a content acquisition request for acquisition target content, in cases in which an accumulation sequence indicated by sequence information associated with the identification information of the device included in the content acquisition request is older than the accumulation sequence indicated by the sequence information included in the content acquisition request, and searching for a device holding the acquisition target content and making a request to a found device for the acquisition target content, in cases in which the accumulation sequence is newer than the accumulation sequence indicated by the sequence information included in the content acquisition request.

Abstract: A disclosed data management method includes: identifying, for each key included in a plurality of sets each of which includes a key and a value, a frequency that the key was used for search, when the plurality of sets is to be added to one of a plurality of storage units that dispersedly store sets each of which includes a key and a value; weighting each key included in the plurality of sets by the frequency identified for the key to calculate, for each of the plurality of storage units, an inclusion degree for keys included in the plurality of sets; and selecting a storage unit to which the plurality of sets is to be added based on the calculated inclusion rates.

Abstract: A distributed control method in a distributed control system including a process executed by a by a first notification device, the process including notifying a detection of a first event to a second notification device, storing, in a storage device, acknowledgement information associating an event identifier indicating the first event with a device identifier indicating the second notification device when a negative acknowledgement is received from the second notification device, determining whether the event identifier indicating the first event is stored in the storage device or not when a request for a notification of the detection of the first event is received from a third notification device, and deleting, from the storage device, a device identifier associated with the event identifier indicating the first event when it is determined that the event identifier indicating the first event is stored in the storage device.

Abstract: A content transmission method including: searching, when a first information processing device receives a transmission request for a first content from a second information processing device, for a third information processing device within information processing devices, at least one of the information processing devices having a connection with the second information processing device and currently transmitting a second content to the second information processing device; and transmitting to the third information processing device, by the first information processing device, the first content and an instruction to transmit the transmitted first content from the third information processing device to the second information processing device in accordance with the transmission request.

Abstract: A content distribution method executed by a computer includes referring to a result of comparing information identifying content data stored in a storage unit with information identifying content data stored in one or more other storage units included in one or more other computers; and collecting representative image data of content data not stored in the storage unit from the one or more other storage units included in the one or more other computers storing the content data not stored in the storage unit, starting from one of the one or more other computers having a greatest number of pieces of the content data.

Abstract: A distributed control method in a distributed control system including a process executed by a by a first notification device, the process including notifying a detection of a first event to a second notification device, storing, in a storage device, acknowledgement information associating an event identifier indicating the first event with a device identifier indicating the second notification device when a negative acknowledgement is received from the second notification device, determining whether the event identifier indicating the first event is stored in the storage device or not when a request for a notification of the detection of the first event is received from a third notification device, and deleting, from the storage device, a device identifier associated with the event identifier indicating the first event when it is determined that the event identifier indicating the first event is stored in the storage device.

Abstract: A content acquisition device includes a processor that executes a procedure. The procedure includes: acquiring group data to identify a group that a user belongs to; and based on a period of time needed to acquire content from each of a first data processing device that holds content shared by the group indicated by the group data, and a second data processing device that is in the process of acquiring the content from the first data processing device, selecting a data processing device from which to acquire the content.

Abstract: A content acquisition device includes a processor that executes a procedure. The procedure includes: referencing other device holding information in which identification information of another device is associated with the oldest sequence information, making a request to a device indicated by device identification information included in a content acquisition request for acquisition target content, in cases in which an accumulation sequence indicated by sequence information associated with the identification information of the device included in the content acquisition request is older than the accumulation sequence indicated by the sequence information included in the content acquisition request, and searching for a device holding the acquisition target content and making a request to a found device for the acquisition target content, in cases in which the accumulation sequence is newer than the accumulation sequence indicated by the sequence information included in the content acquisition request.

Abstract: A non-transitory computer-readable recording medium has stored therein a program for causing a computer to execute a process, the process includes transferring communication data, transmitted from a first apparatus, which includes data and a first attribute regarding the data, to a second apparatus, receiving a notification that includes a second attribute regarding the data and a transfer destination of the communication data inclusive of the second attribute, transferring the communication data inclusive of the second attribute to a third apparatus of the transfer destination included in the notification; and transferring the notification to other transfer apparatus.

Abstract: A content transmission method including: searching, when a first information processing device receives a transmission request for a first content from a second information processing device, for a third information processing device within information processing devices, at least one of the information processing devices having a connection with the second information processing device and currently transmitting a second content to the second information processing device; and transmitting to the third information processing device, by the first information processing device, the first content and an instruction to transmit the transmitted first content from the third information processing device to the second information processing device in accordance with the transmission request.

Abstract: A method of content delivery executed by a computer is provided. The computer specifies an identifier of a content associated with an user identifier, an identifier of a device at a delivery destination of the content, and time until data of the content is delivered to the device at the delivery destination, when event data including the user identifier read by a sensor is received. The computer calculates, from the specified time, a clock time to start content sending to the device at the delivery destination of the content or a clock time to start data sending to a device that carries out the content sending, and stores these data, and sends the stored data to the device of the delivery destination, at a clock time that is stored in the data storage unit.

Abstract: A disclosed system includes a first computer that stores data, a display apparatus that is capable of reading a user identifier, a second computer, and plural third computers. The second computer includes a data storage unit storing first correlation data to correlate a user identifier with at least one third computer, and a controller that refers to the first correlation data upon detecting an event data, identifies a third computer correlated with a first user identifier included in the event data, and transmits the first user identifier to the identified third computer. Each third computer includes a receiver that receives the first user identifier, a storing unit that obtains from the first computer, and stores data identified based on the received first user identifier, and a controller to transmit data corresponding to a second user identifier, which was received from the display apparatus, based on the second user identifier.

Abstract: A content acquisition device includes a processor that executes a procedure. The procedure includes: acquiring group data to identify a group that a user belongs to; and based on a period of time needed to acquire content from each of a first data processing device that holds content shared by the group indicated by the group data, and a second data processing device that is in the process of acquiring the content from the first data processing device, selecting a data processing device from which to acquire the content.

Abstract: A content distribution method executed by a computer includes referring to a result of comparing information identifying content data stored in a storage unit with information identifying content data stored in one or more other storage units included in one or more other computers; and collecting representative image data of content data not stored in the storage unit from the one or more other storage units included in the one or more other computers storing the content data not stored in the storage unit, starting from one of the one or more other computers having a greatest number of pieces of the content data.

Abstract: A conversion server stores therein a combination of client information indicating the type of a client terminal and content information that is requested to be sent from the client terminal. Furthermore, the conversion server stores therein server information indicating a conversion server responsible for the format of content in such a manner that the server information is associated with the combination of the client information and the content information. If the conversion server receives, from the client terminal, a send request for content, the conversion server distinguishes between the client information on the client terminal and the content information on the content requested to be sent. The conversion server notifies a conversion server indicated by the server information associated with the combination of the distinguished client information and the distinguished content information of the distinguished client information and the distinguished content information.

Abstract: A relay device, when receiving response information for initial request information, extracts, from the received response information, first session identification information for identifying a session established between an information processing terminal having transmitted the request information and an information processing device having received the request information, transmits the response information to the information processing terminal, transmits the response information to the information processing terminal, transmits session supporting address information to another relay device, extracts second session identification information from request information for the second time or later received from the information processing terminal, and queries the relay device to which the session supporting address information has already been transmitted, for the session supporting address information corresponding to the extracted second session identification information.

Abstract: A load balancing apparatus stores a transfer rule in which a path control identifier for identifying a path for a message sent from a client device is associated with relay device information for specifying a relay device that creates the path control identifier. When receiving a message from the client device, the load balancing apparatus determines whether the message contains the path control identifier. If the load balancing apparatus determines that the path control identifier is contained, the load balancing apparatus specifies, from the transfer rule, relay device information with which the path control identifier is associated and then sends the message to a relay device that is specified by the specified relay device information. In contrast, if the load balancing apparatus determines that the path control identifier is not contained, the load balancing apparatus sends the message to the relay device specified in accordance with a predetermined condition.

Abstract: A relay apparatus generates partial message data by assembling a package group, the packet group including, out of a plurality of packets received and related to one message, a head packet related to the one message up to a packet including, as a payload, user identification information in a header of the one message. The relay apparatus extracts the user identification information from the partial message data and identifying a user identifier from the user identification information. The relay apparatus performs a specific packet process, in accordance with the identified user identifier, on the packet group of the one message, and a packet not assembled by a packet assembling unit out of the plurality of packets.

Abstract: A non-transitory computer-readable recording medium has stored therein a program for causing a computer to execute a process, the process includes transferring communication data, transmitted from a first apparatus, which includes data and a first attribute regarding the data, to a second apparatus, receiving a notification that includes a second attribute regarding the data and a transfer destination of the communication data inclusive of the second attribute, transferring the communication data inclusive of the second attribute to a third apparatus of the transfer destination included in the notification; and transferring the notification to other transfer apparatus.

Abstract: A method of content delivery executed by a computer is provided. The computer specifies an identifier of a content associated with an user identifier, an identifier of a device at a delivery destination of the content, and time until data of the content is delivered to the device at the delivery destination, when event data including the user identifier read by a sensor is received. The computer calculates, from the specified time, a clock time to start content sending to the device at the delivery destination of the content or a clock time to start data sending to a device that carries out the content sending, and stores these data, and sends the stored data to the device of the delivery destination, at a clock time that is stored in the data storage unit.