JP5898155B2 - Information system, first server device, information processing method, and program - Google Patents

Description

  The present invention relates to an information system that acquires and transmits information according to an instruction from a terminal device.

  As a conventional technique, when the processing unit of the load balancer receives a request including the generation date and time of the data to be processed and the ID of the data from the client machine, the ID of each of the plurality of servers and the ID of the data in the request If the server generation candidate is selected based on the request, and the data generation date is older than the candidate server participation date, the next server on the ID space is selected again as a candidate, and the data generation date A distributed processing system is known in which server candidates are selected again until a server with an older participation date is found, and the selected server transmits the request (see, for example, Patent Document 1).

JP 2013-25497 A (first page, FIG. 1 etc.)

  However, the conventional technique has a problem that information corresponding to an instruction transmitted from the terminal device cannot be preferentially acquired from a server designated in advance.

  For example, in the prior art, since a load distribution device such as a load balancer has determined a server that distributes requests, a server that executes processing according to a request cannot be fixed, and a server designated in advance Therefore, it is difficult to acquire information corresponding to the instruction transmitted from the terminal device.

  On the other hand, when the information according to the instruction transmitted from the terminal device is always obtained from the same server without using a load balancer or the like, connection with a server designated in advance due to a disaster or a server down is not possible. If it is not possible, there is a possibility that information corresponding to the instruction transmitted from the terminal device cannot be acquired at all.

  The present invention has been made to solve the above-described problems, and provides an information system capable of preferentially acquiring information corresponding to an instruction from a terminal device from one server device. Objective.

  The information system of the present invention is an information system including a first server device, a control device, and two or more second server devices, and the first server device receives a first instruction that is an instruction to acquire information. A first instruction receiving means for receiving information from the apparatus, and a first instruction receiving means for transmitting an information acquisition instruction corresponding to the first instruction to a second server apparatus when the first instruction receiving means receives the first instruction; Acquisition of information indicating a second server device that is an acquisition destination of information corresponding to the first instruction to the control device when the instruction transmission unit and information corresponding to the first instruction cannot be received from one second server device An acquisition destination request transmitting means for transmitting acquisition destination request information, which is information for requesting destination information, and an acquisition destination receiving means for receiving acquisition destination information corresponding to the acquisition destination request information from the control device. The transmission means corresponds to the first instruction When the information cannot be received from one second server device, the acquisition device receiving means transmits an instruction to acquire information corresponding to the first instruction to the second server device indicated by the acquisition source information received by the acquisition device. An acquisition destination request receiving unit that receives the acquisition destination request information from the first server device, and when the acquisition destination request reception unit receives the acquisition destination request information, the first one of the two or more second server devices An acquisition destination transmitting means for transmitting acquisition destination information indicating the two server devices to the first server device, the second server device corresponding to the first instruction and the second information storage means for storing one or more pieces of information A second instruction receiving unit that receives an instruction to acquire information to be acquired, a second information acquiring unit that acquires information corresponding to the first instruction from the second information storage unit, and a second information acquiring unit that acquires the terminal device. A second transmission means for transmitting the received information Is an example was information system.

  In the information system of the present invention, in the information system, the first server device is information corresponding to the first instruction in response to an instruction to acquire information corresponding to the first instruction transmitted by the first instruction transmitting unit. First information receiving means for receiving the information from the second server device, and first information transmitting means for transmitting the information received by the first information receiving means to the terminal device, wherein the first information receiving means comprises: In response to an instruction to acquire information corresponding to the first instruction transmitted by the first instruction transmitting means, information corresponding to the first instruction is received from the second server device indicated by the acquisition destination information, and the second transmitting means The information system transmits the information acquired by the second information acquisition means to the first server device that has transmitted the information acquisition instruction corresponding to the first instruction.

  Moreover, the information system of this invention is an information system whose information is the information of an advertisement in the said information system.

  The 1st server apparatus of this invention is a 1st server apparatus which comprises the said information system.

  In the first server device of the present invention, in the first server device, a first instruction receiving unit that receives a first instruction that is an instruction to acquire information from the terminal device, and a first instruction receiving unit that receives the first instruction 1st instruction transmission means for transmitting an instruction to acquire information corresponding to the first instruction to one of the two or more second server apparatuses, and corresponding to the first instruction Information indicating the second server device that is the acquisition destination of information corresponding to the first instruction of the two or more second server devices when the information to be received cannot be received from one second server device An acquisition destination request transmitting means for transmitting acquisition destination request information, which is information for requesting destination information, and an acquisition destination receiving means for receiving acquisition destination information corresponding to the acquisition destination request information from the control device. The transmission means is information corresponding to the first instruction. If you can not receive from one second server is a first server device transmits an instruction for acquisition of information corresponding to the first instruction to the second server device indicated by the obtained destination information received by the acquisition source receiving means.

  According to the information system or the like according to the present invention, information corresponding to an instruction from a terminal device can be preferentially acquired from one server device.

The block diagram of the information system in embodiment of this invention The flowchart explaining operation | movement of the 1st server apparatus of the information system Flow chart for explaining the operation of the control device of the information system The flowchart explaining operation | movement of the 2nd server apparatus of the information system Conceptual diagram of the information system The figure which shows the advertising information management table of the same information system The figure which shows the example of a display of the advertisement information which the same information system transmits Figure showing the acquisition information management table of the same information system Schematic diagram for explaining a modification of the information system The figure which shows an example of the external appearance of the computer system in embodiment of this invention The figure which shows an example of a structure of the computer system

  Hereinafter, embodiments of an information system and the like will be described with reference to the drawings. In addition, since the component which attached | subjected the same code | symbol in embodiment performs the same operation | movement, description may be abbreviate | omitted again.

(Embodiment)
FIG. 1 is a block diagram of an information system 1 in the present embodiment.

  The information system 1 includes a first server device 10, a control device 20, and two or more second server devices 30. In addition, in FIG. 1, the case where the 2nd server apparatus 30 is 3 or more is shown for convenience of explanation, but the 2nd server apparatus 30 should just be 2 or more. In the information system 1, the first server device 10, the control device 20, and the two or more second server devices 30 are connected via a communication line, a network, or the like so that they can communicate with each other. This network may be, for example, a WAN such as the Internet or a LAN such as a corporate network.

  The first server device 10 is connected to one or more terminal devices 40 via a network or a communication line so that they can communicate with each other. In FIG. 1, a case where there is one terminal device 40 is shown as an example, but a plurality of terminal devices 40 may be provided. The network or communication line connecting the terminal device 40 and the first server device 10 may be the same network or communication line as the network or communication line connecting the devices constituting the information system 1 or different. It may be a network or a communication line. This network is, for example, a WAN such as the Internet.

  The first server device 10 includes a first instruction receiving unit 101, a first instruction transmitting unit 102, a first information receiving unit 103, a first information transmitting unit 104, an acquisition destination request transmitting unit 105, and an acquisition destination receiving unit 106. .

  The control device 20 includes an acquisition destination request reception unit 201, an acquisition destination storage unit 202, a load acquisition unit 203, and an acquisition destination transmission unit 204.

  The second server device 30 includes second information storage means 301, second instruction reception means 302, second information acquisition means 303, and second transmission means 304.

  The first instruction receiving unit 101 receives the first instruction from the terminal device 40. The first instruction is an instruction to acquire information. The information instructed by the first instruction is, for example, information stored in the second information storage unit 301 of the second server device 30 described later. The information that the first instruction instructs acquisition is, for example, advertisement information.

  The first instruction may be considered as information requesting transmission of information, for example. The first instruction may have an information identifier for identifying information to be acquired, or may be only an instruction. Further, reception of only the information identifier may be considered as reception of the first instruction. Further, the first instruction may have information that specifies an attribute of information to be acquired. The attribute included in the first instruction may be, for example, information specifying a data structure, or information indicating the field of the information indicated by the information. Further, when the information to be acquired is advertisement information, the attribute included in the first instruction may be information indicating an advertiser or information indicating a classification of the advertisement target.

  Further, the first instruction may have an identifier of the terminal device 40 that is a transmission source of the first instruction. The identifier of the terminal device 40 is address information such as an IP address or a MAC address of the terminal device 40, for example.

  Further, the first instruction may include information indicating the terminal device 40 or the user attribute of the terminal device 40, or information capable of determining the attribute. The information indicating this attribute and the information capable of determining the attribute are, for example, information indicating the history of operations by the terminal device 40 or its user. The operation history is, for example, a browsing history of the terminal device 40 or pages viewed by the user. The browsing history may be, for example, information on a character string that is included or frequently appears in the browsed page, or meta information associated with the browsed page, for example, information such as a keyword or a title. Also good. The information indicating the attribute of the terminal device 40 and the user of the terminal device 40 and the information capable of determining the attribute are, for example, cookie information stored in the terminal device 40.

  The first instruction receiving unit 101 may receive the first instruction directly from the terminal device 40 or may receive the first instruction indirectly. Indirect reception means, for example, that the first instruction transmitted from the terminal device 40 via another server device (not shown) or the like is indirectly received.

  The first instruction receiving unit 101 is usually realized by a wireless or wired communication unit. The first instruction receiving unit 101 may or may not include a communication device.

  When the first instruction receiving unit 101 receives the first instruction, the first instruction transmitting unit 102 transmits an instruction to acquire information corresponding to the first instruction to one second server device 30. The one second server device 30 is specifically one specific second server device 30 designated in advance among two or more second server devices. One second server device is, for example, a specific second server device 30 determined for the first server device 10. For example, the first instruction transmission unit 102 has information that can designate one second server device 30 as a transmission destination of an instruction to acquire information corresponding to the first instruction, and can designate this transmission destination. Using the information, an instruction to acquire information corresponding to the first instruction is transmitted to one second server device 30. The information that can be specified as the transmission destination is, for example, address information such as the IP address or MAC address of the second server device 30. However, the device name of the second server device 30 or a code assigned to the second server device 30 may be used. Information corresponding to the first instruction will be described later.

  The information acquisition instruction (hereinafter referred to as the first acquisition instruction) corresponding to the first instruction may be the first instruction itself or information having the first instruction. The first acquisition instruction includes an information identifier included in the first instruction, information specifying an attribute of information to be acquired, information and attributes indicating attributes of the terminal device 40 that transmitted the first instruction and the user. The information may include information that can be acquired, and may further include an instruction to acquire such information, such as a command. Further, only an instruction to acquire information (for example, only an instruction) may be used. Further, the first acquisition instruction may include an identifier of the terminal device that has transmitted the first instruction.

  When the information corresponding to the first instruction cannot be received from the one second server device 30 described above, the first instruction transmitting unit 102 sends the information to the second server device 30 indicated by the acquisition destination information received by the acquisition destination receiving unit 106. A first acquisition instruction is transmitted. The information system 1 or the like, the second server device 30 or the like may be in a state in which information corresponding to the first instruction cannot be received from the one second server device 30 described above within a predetermined period. It may be considered that information corresponding to one instruction cannot be received from the one second server device 30 described above. The acquisition destination information received by the acquisition destination receiving means 106 will be described later.

  The situation where the information corresponding to the first instruction cannot be received from the one second server device 30 described above is, for example, a network or a communication line, an abnormality or failure of the second server device 30, a network or a communication line, or the second server device 30. This occurs due to the high load on the machine.

  Whether or not the information corresponding to the first instruction can be received from one second server device 30 may be determined by the first instruction transmitting unit 102 or the first information receiving unit 103. Alternatively, the acquisition destination request transmission unit 105 may make the determination. Further, a means (not shown) may make the determination. Here, as an example, a case where the first instruction transmitting unit 102 determines whether or not information corresponding to the first instruction can be received from one second server device 30 will be described as an example.

  The first instruction transmission unit 102 may determine whether or not information corresponding to the first instruction can be received from one second server device 30. For example, after the first instruction transmitting unit 102 transmits the first acquisition instruction to one second server device 30, it is transmitted from the second server device 30 until a predetermined time elapses. When the information is received, it is determined that the information corresponding to the first instruction can be received. When the information is not received, it is determined that the information corresponding to the first instruction cannot be received. That is, when a so-called timeout occurs, it is determined that information corresponding to the first instruction cannot be received from one second server device 30. Alternatively, before transmitting the first acquisition instruction, the first instruction transmission unit 102 transmits information for confirming whether communication is possible to one second server device 30 and responds to this transmission. If information cannot be received from one second server device 30 by the time specified in advance, it is determined that information corresponding to the first instruction cannot be received from one second server device 30. May be. In addition, the first instruction transmission unit 102 sequentially obtains a determination result as to whether or not communication with the second server device 30 is possible at predetermined timings and time intervals. Before transmitting an acquisition instruction, etc., it may be determined whether information corresponding to the first instruction can be received from one second server device 30 according to the acquired information of the latest determination result.

  Further, the first server device 10 sends information indicating the network, communication line, and load of the second server device 30 from one second server device 30 at a predetermined timing (for example, at regular time intervals). ) May be received from the second server device 30, and it may be determined whether information corresponding to the first instruction can be received from the information indicating the load. For example, when the value indicating the load is equal to or greater than a threshold value, it may be determined that reception is not possible. Note that the first instruction transmission unit 102, for example, reduces the load of one second server device 30 by a process similar to the process in which the load acquisition unit 203 described later acquires information indicating the load of the second server device 30. It may be determined whether information corresponding to the first instruction can be received from one second server device 30 according to the information indicating the load. For example, the first instruction transmission unit 102 acquires information indicating the load of one second server device 30 by processing similar to the load acquisition unit 203 described later at each timing and time interval specified in advance. It may be determined whether information corresponding to the first instruction can be received from one second server device 30 according to the information indicating the load. For example, when the information indicating the acquired load (for example, the operating rate of the MPU) indicates the magnitude of the load that is equal to or greater than a value specified in advance, the first instruction transmission unit 102 receives the first instruction from the second server device 30. It may be determined that information corresponding to one instruction cannot be received.

  For example, when the information corresponding to the first instruction can be received from one second server device 30, the first instruction transmitting unit 102 stores the information corresponding to the first instruction received by the first instruction receiving unit 101. When a first acquisition instruction, which is an acquisition instruction, is transmitted to a specific second server device 30 and information corresponding to the first instruction cannot be received from the second server device 30, it will be described later. A first acquisition instruction, which is an instruction to acquire information corresponding to the first instruction received by the first instruction receiving means 101, is transmitted to the second server device 30 indicated by the acquisition destination information received by the acquisition destination receiving means 106.

  In addition, when the first priority is associated with a specific second server device 30 that is a default transmission destination in advance and information cannot be acquired from the second server device 30, the control device 20 A second load priority is associated with the second server device 30 to be determined, and a software load balancer (not shown) stored in a storage medium (not shown) of the first server device 10 is executed. By doing so, you may make it try acquiring the information corresponding to a 1st instruction in an order from a high priority. For example, it is determined whether or not information corresponding to the first instruction can be acquired from one second server device 30 associated with the first priority by the software load balancer. When the information is acquired from the second server device 30 and cannot be acquired, the second server device 30 indicated by the second server device associated with the second priority, that is, the acquisition destination information acquired from the control device 20 The information corresponding to the first instruction may be acquired.

  The first instruction transmitting unit 102 is usually realized by a wireless or wired communication unit. The first instruction transmission unit 102 may or may not include a communication device. The configuration for determining whether or not the information corresponding to the first instruction has been received from the second server device 30 by the first instruction transmitting unit 102 can be realized by an MPU, a memory, or the like. The determination processing procedure is usually realized by software, and the software is recorded in a recording medium such as a ROM. However, it may be realized by hardware (dedicated circuit).

  The first information receiving unit 103 receives information corresponding to the first instruction from one second server device 30 in response to the first acquisition instruction transmitted by the first instruction transmitting unit 102. The information corresponding to the first instruction is specifically information acquired in response to the first instruction. For example, the information corresponding to the first instruction is information acquired in response to the first instruction by the second server device 30 that has received the first acquisition instruction. The information corresponding to the first instruction is, for example, information indicated by an information identifier included in the first instruction. Moreover, the information which has the attribute which the information which designates the attribute which a 1st instruction | indication shows may be sufficient. Further, it is information having an attribute corresponding to an attribute indicated by information indicating the attribute of the terminal device 40 or the user included in the first instruction, or an attribute acquired from information capable of determining the attribute of the terminal device 40 or the user. . Moreover, the information which the 2nd server apparatus 30 which received the 1st acquisition instruction | indication acquires according to a predetermined algorithm etc. according to the reception of a 1st acquisition instruction | indication according to a 1st instruction | indication may be sufficient. . The algorithm in this case may be an algorithm that acquires information at random. Moreover, the information acquired by these combination may be sufficient.

  When the information corresponding to the first instruction cannot be received from the second server device 30 described above, the first information receiving unit 103 receives the first acquisition instruction transmitted by the first instruction transmitting unit 102 according to the first acquisition instruction. Information corresponding to one instruction is received from the second server device 30 indicated by the acquisition destination information.

  The first information receiving unit 103 is usually realized by a wireless or wired communication unit. The first information receiving unit 103 may or may not include a communication device. In addition, the first information receiving unit 103 obtains information corresponding to the first instruction from the state of communication with the second server device 30 and the means for acquiring the load status of the second server device 30 and these states. It may further comprise means for determining whether or not it can be received from the second server device 30 described above.

  The first information transmission unit 104 transmits the information received by the first information reception unit 103 to the terminal device 40. Specifically, the first information transmitting unit 104 transmits the information received by the first information receiving unit 103 to the terminal device 40 that is the transmission source of the first instruction received by the first instruction receiving unit 101.

  The first information transmitting unit 104 is usually realized by a wireless or wired communication unit. The first information transmission unit 104 may or may not include a communication device.

  The acquisition destination request transmission unit 105 transmits the acquisition destination request information to the control device 20 when information corresponding to the first instruction cannot be received from one second server device 30. The acquisition destination request information is information for requesting acquisition destination information. The acquisition destination information is information indicating the second server device 30 that is an acquisition destination of information corresponding to the first instruction received by the first instruction receiving unit 101. The acquisition destination information is, for example, an identifier (hereinafter referred to as a second server identifier) indicating one second server device 30 among the two or more second server devices 30. The second server identifier is information that can specify the second server device 30, preferably information that can specify the second server device 30 as the transmission destination of the first acquisition instruction. The second server identifier is address information such as an IP address or a MAC address of the second server device 30, for example. However, the device name of the second server device 30 or a code assigned to the second server device 30 may be used. Note that one second server device 30 is provided as information that can designate one second server device 30 included in the first instruction transmission unit 102 as a transmission destination of an instruction to acquire information corresponding to the first instruction. Thirty second server identifiers may be used.

  The acquisition destination request information is information having an instruction for requesting acquisition destination information, for example. The acquisition destination request information may include the identifier of the first server device 10 and the second server identifier of the above-described second server device 30 that is determined to be unable to receive information corresponding to the first instruction. . Alternatively, the identifier or the second server identifier of the first server device 10 may be used as acquisition destination request information. Since the identifier of the first server device 10 is the same identifier as the second server identifier, detailed description is omitted here.

  In this embodiment, the case where the first instruction transmitting unit 102 determines whether or not the information corresponding to the first instruction can be received from one second server device 30 is described as an example. As described above, this determination processing may be performed by the first information receiving unit 103 or the acquisition destination request transmitting unit 105. This determination process may be performed by a determination unit (not shown). In this case, a process similar to the process performed by the first instruction transmission unit 102 may be performed.

  The acquisition destination request transmission unit 105 is usually realized by a wireless or wired communication unit. The acquisition destination request transmission unit 105 may or may not include a communication device.

  The acquisition destination receiving unit 106 receives acquisition destination information corresponding to the acquisition destination request information from the control device 20. Specifically, the acquisition destination receiving unit 106 receives the acquisition destination information acquired by the control device 20 in accordance with the acquisition destination request information transmitted by the acquisition destination request transmission unit 105 from the control device 20.

  The acquisition destination receiving means 106 is usually realized by a wireless or wired communication means. The acquisition destination receiving means 106 may or may not include a communication device.

  The acquisition destination request receiving unit 201 receives acquisition destination request information from the first server device 10. The acquisition destination request receiving unit 201 is usually realized by a wireless or wired communication unit. The acquisition destination request receiving unit 201 may or may not include a communication device.

  The acquisition destination storage unit 202 stores two or more pieces of acquisition destination information respectively indicating two or more second server devices 30. The acquisition destination information is, for example, a second server identifier. The acquisition destination storage unit 202 is preferably a non-volatile recording medium, but can also be realized by a volatile recording medium. The same applies to the following storage units.

  The load acquisition unit 203 acquires information indicating each load of the two or more second server devices 30. The load of the second server device 30 is, for example, information indicating the degree of use of the processing capability of the second server device 30. The higher the load, the more processing capacity is used. The information indicating the load of the second server device 30 is, for example, the number of connections between the second server device 30 and other devices, the response speed, and the response time. For example, the larger the number of connections, the higher the load. Also, the faster the response speed, the lower the load. It does not matter how the load acquisition unit 203 acquires information indicating the load from two or more second server devices 30. For example, the information indicating the load may be transmitted from the second server device 30 by transmitting information requesting transmission of the information indicating the load to each second server device 30 at a constant or indefinite timing. Alternatively, information for requesting a response at a constant or indefinite timing may be transmitted to each second server device 30, and the time until the response is obtained may be acquired as information indicating the load. Note that the process of acquiring information indicating the load of each of the plurality of server devices is a well-known technique in so-called load balancing and load distribution processing such as global server load balancing, and therefore detailed description thereof is omitted here. .

  The load acquisition unit 203 associates the information indicating the load acquired for each second server device 30 with the corresponding acquisition destination information (for example, the corresponding second server identifier) and stores the information in the acquisition destination storage unit 202. It may be.

  The load acquisition unit 203 can be usually realized by an MPU, a memory, or the like. The processing procedure of the load acquisition unit 203 is usually realized by software, and the software is recorded on a recording medium such as a ROM. However, it may be realized by hardware (dedicated circuit). In addition, the load acquisition unit 203 may further include a wireless or wired communication unit for transmitting and receiving information necessary for acquiring information indicating the load.

  The acquisition destination transmission unit 204, when the acquisition destination request reception unit 201 receives the acquisition destination request information, acquires acquisition destination information indicating any one of the two or more second server devices 30. It transmits to the first server device 10. The acquisition destination transmission unit 204 acquires, for example, any one of the acquisition destination information indicating each of the two or more second server devices 30 stored in the acquisition destination storage unit 202, and acquires the acquired acquisition destination information. Is transmitted to the first server device 10.

  It does not matter how the acquisition destination transmission unit 204 selects acquisition destination information indicating one of the two or more second server devices 30. For example, randomly from the second server device 30 other than the one second server device 30 designated in advance as the transmission destination of the first instruction transmission means 102 of the first server device 10 that is the transmission source of the acquisition destination request information. Alternatively, the second server device 30 may be selected in order.

  In addition, the acquisition destination transmission unit 204 may transmit, to the first server device 10, acquisition source information indicating the second server device 30 having a low load among the two or more second server devices 30, for example. The second server device 30 with a low load is, for example, the second server device 30 with a small number of connections with other devices or the second server device 30 with a quick response. For example, the second server device 30 with a low load is selected using information indicating the load acquired by the load acquisition unit 203 described above for each of the two or more second server devices 30. The second server device 30 with the least load may be the second server device 30 with the least load, or may not be the second server device 30 with the least load. For example, it may be any one of the second server devices 30 whose load is equal to or less than a threshold value. Alternatively, a second server device having a high specific load (for example, MPU load, input / output load, etc.) may be selected. In addition, the process and algorithm for selecting the optimal second server apparatus with little load using the information which shows the load of 2 or more 2nd server apparatuses 30 are load balancing, global server load balancing etc., for example Since the load distribution process is a known technique, a detailed description thereof is omitted here. The control device 20 may be a global server load balancer (GSLB).

  In addition, when the information system 1 has a plurality of first server devices 10 and the plurality of first server devices 10 use one control device 20, each first server device 10 is included in a storage medium (not shown). Information associated with the second server identifiers of the two or more second server devices 30 or the first instruction transmitting means 102 of each first server device 10 specified in advance. Information having one second server identifier, which is a transmission destination of one acquisition instruction, and second server identifiers of two or more second server devices 30 may be stored. Then, two or more second server identifiers associated with the identifier of the first server device 10 that is the transmission source of the acquisition destination request information, or the first server that is the transmission source of the acquisition destination request information included in the acquisition destination request information Two or more second server identifiers associated with the second server identifier of one second server device 30 which is the transmission destination of the first acquisition instruction specified in advance for the first instruction transmission unit 102 of the device 10 From this, one second server identifier may be acquired. When acquiring, as mentioned above, you may make it acquire the 2nd server identifier of the 2nd server apparatus 30 with little load. By doing so, it is specified in advance for the first instruction transmission unit 102 of the first server device 10 that is the transmission source of the acquisition destination request information or the first server device 10 that is the transmission source of the acquisition destination request information. It is possible to determine the second server device 30 that is the transmission destination of the first acquisition instruction from the second server devices 30 corresponding to the one second server device 30 that is the transmission destination of the first acquisition instruction. Become.

  The acquisition destination transmission unit 204 is usually realized by a wireless or wired communication unit. The acquisition destination transmission unit 204 may or may not include a communication device. In addition, the process in which the acquisition destination transmission unit 204 selects the acquisition source information using information indicating the load or the like can be normally realized from an MPU, a memory, or the like. This processing procedure is usually realized by software, and the software is recorded on a recording medium such as a ROM. However, it may be realized by hardware (dedicated circuit).

  The second information storage unit 301 stores one or more pieces of information. The information stored in the second information storage unit 301 may have any data structure such as a still image, a moving image, sound, text, and the like. The information stored in the second information storage unit 301 is preferably advertising information, but the content of the information does not matter. The advertisement information may be any data structure such as a still image, a moving image, sound, text, etc., as long as the content information indicates the advertisement.

  The second information storage unit 301 stores one or more pieces of information in association with, for example, information identifiers. The second information storage unit 301 stores one or more pieces of information in association with, for example, information attributes. This attribute may be a keyword corresponding to information.

  The information stored in the second information storage unit 301 of the different second server device 30 is usually the same information, but it may not be the same information.

  The second instruction receiving unit 302 receives the first acquisition instruction from the first instruction transmitting unit 102 of the first server device 10. The second instruction receiving unit 302 is usually realized by a wireless or wired communication unit. The second instruction receiving unit 302 may or may not include a communication device.

  The second information acquisition unit 303 acquires information corresponding to the first instruction from the second information storage unit 301. Specifically, the second information acquisition unit 303 acquires information corresponding to the first instruction from the second information storage unit 301 in accordance with the first acquisition instruction received by the second instruction reception unit 302.

  It does not matter how the second information acquisition unit 303 acquires information corresponding to the first instruction from the second information storage unit 301 in accordance with the first acquisition instruction received by the second instruction reception unit 302.

  For example, when the first acquisition instruction received by the second instruction receiving unit 302 has the information identifier included in the first instruction, the second information acquisition unit 303 displays the information indicated by the information identifier included in the first instruction. Obtained from the second information storage unit 301 as information corresponding to the first instruction. Further, for example, when the first acquisition instruction received by the second instruction receiving unit 302 includes information specifying the attribute included in the first instruction, the second information acquisition unit 303 includes the attribute included in the first instruction. The information having the attribute indicated by the information designating is acquired from the second information storage unit 301. Further, when the first instruction includes information indicating the attributes of the terminal device 40 or its user, or information capable of determining the attributes of the terminal device 40 or its user, the second information acquisition unit 303 acquires, for example, from this information Information having an attribute corresponding to the attribute of the user who has performed may be acquired from the second information storage unit 301.

  In addition, the second information acquisition unit 303 may acquire information from the second information storage unit 301 in accordance with a predesignated algorithm or the like, for example, triggered by reception of the first acquisition instruction. The algorithm in this case may be an algorithm that acquires information at random. The second information acquisition unit 303 may acquire information by appropriately combining these two or more processes.

  In addition, when the information acquired by the first information acquisition unit 303 is information of an advertisement placed on a page of an electronic medium such as a WEB page, the second information acquisition unit 303 respectively responds to a plurality of first instructions. It is preferable to acquire information of different advertisements as information of a plurality of advertisements arranged on one page to be acquired. In this case, for example, when the first instruction transmitted by the terminal device 40 is an instruction to acquire information on the advertisement placed on the page, the first server device 10 displays the first instruction including the identifier of the page on which the advertisement is placed. The first instruction transmission means 102 of the first server device 10 transmits a first acquisition instruction including the identification information of this page to one second server device 30 designated in advance, and one second The server device may acquire different advertisement information corresponding to the first instruction for the first acquisition instruction including the identifier of the same page. Alternatively, for the first acquisition instruction including the identifier of the same page for a predetermined time, for example, about 1 to 10 seconds, information on different advertisements corresponding to the first instruction is acquired. That's fine. If it is one second server device 30, it is possible to hold information on advertisements that have already been acquired in accordance with one first instruction, so information on advertisements that have already been acquired with respect to other first instructions It is possible not to acquire again. In this way, different advertisement information can be acquired and transmitted in response to a plurality of first instructions that request information of a plurality of advertisements arranged on the same page. As the page identification information, for example, information such as a so-called cookie can be used. Further, instead of the page identification information, the identification information of the terminal device 40 such as an IP address may be used.

  The second information acquisition unit 303 can usually be realized by an MPU, a memory, or the like. The processing procedure of the second information acquisition unit 303 is usually realized by software, and the software is recorded on a recording medium such as a ROM. However, it may be realized by hardware (dedicated circuit).

  The second transmission unit 304 transmits the information acquired by the second information acquisition unit 303 to the terminal device 40. The transmission destination terminal device 40 is a terminal device that is a transmission source of the first instruction. The second transmission unit 304 may directly transmit the information acquired by the second information acquisition unit 303 to the terminal device 40 or indirectly through another device or the like. For example, the second transmission unit 304 transmits the information acquired by the second information acquisition unit 303 to the first server device 10 that has transmitted the first acquisition instruction. And the 1st server apparatus 10 which received information transmits the received information to the terminal device 40 which is a transmission source of a 1st instruction | indication, As a result, the information acquired by the 2nd information acquisition means 303 is obtained. Can be transmitted to the terminal device 40.

  When the second transmission unit 304 directly transmits the information acquired by the second information acquisition unit 303 to the terminal device 40, for example, the terminal device 40 has its own device identifier, for example, an address such as an IP address. A first instruction having information and a first acquisition instruction are transmitted. In this case, the first information receiving unit 103 and the first information transmitting unit 104 may be omitted. In this case, the second transmission unit 304 needs to be able to access the communication line or network to which the terminal device 40 is connected.

  The second transmission unit 304 is usually realized by a wireless or wired communication unit. The second transmission unit 304 may or may not include a communication device.

  Note that the second server device 30 receives, for example, a reception unit (not shown) that receives information for acquiring the load information of the second server device 30 transmitted by the load acquisition unit 203 of the control device 20 or the like. For example, a transmission unit (not shown) that transmits information corresponding to the information to be transmitted to the control device 20 may be further provided.

  The terminal device 40 includes, for example, an operation reception unit (not shown) that receives an operation from a user, and a terminal transmission unit that transmits a first instruction to the first server device 10 according to the operation received by the operation reception unit (see FIG. A terminal receiving unit (not shown) that receives information transmitted from the first server device 10 in response to the first instruction, and a terminal output unit (not shown) that outputs information received by the terminal receiving unit. )). The output here is a concept including display on a display, printing on paper or the like by a printer, sound output, transmission to an external device, and the like.

  The terminal device 40 can be realized by, for example, a computer, a portable information terminal, a mobile phone, a multifunctional mobile phone such as a so-called smartphone, a tablet terminal, or the like.

  Next, an example of operation | movement of the 1st server apparatus 10 of the information system 1 is demonstrated using the flowchart of FIG.

  (Step S101) The first instruction receiving means 101 determines whether or not a first instruction has been received. If received, the process proceeds to step S102. If not received, the process returns to step S101.

  (Step S <b> 102) The first instruction transmission unit 102 transmits a first acquisition instruction to one specific second server device 30.

  (Step S103) The first information receiving means 103 determines whether or not information corresponding to the first instruction has been received from the one second server device 30 that has transmitted the first acquisition instruction in Step S102. If received, the process proceeds to step S104. If not received, the process proceeds to step S105.

  (Step S104) The first information transmission unit 104 transmits the information received in step S103 to the terminal device 40 that is the transmission source of the first instruction. Then, the process returns to step S101.

  (Step S105) The first instruction transmission unit 102 determines whether or not a predetermined time has elapsed since the transmission of the first acquisition instruction in Step S102. The predesignated time is, for example, about 1-5 seconds. If it has elapsed, the process proceeds to step S106, and if it has not elapsed, the process returns to step S103. The determination result that the time specified in advance has passed may be considered as a determination result that information corresponding to the first instruction cannot be received from one second server device 30.

  (Step S <b> 106) The acquisition destination request transmission unit 105 transmits acquisition destination request information to the control device 20.

  (Step S107) The acquisition destination receiving means 106 determines whether or not acquisition destination information has been received. If received, the process proceeds to step S108. If not received, the process returns to step S107.

  (Step S108) The first instruction transmission unit 102 transmits a first acquisition instruction to the second server device 30 indicated by the acquisition destination information received in Step S107.

  (Step S109) The first information receiving means 103 determines whether or not information corresponding to the first instruction has been received from the second server device 30 that has transmitted the first acquisition instruction in Step S108. If received, the process returns to step S104. If not received, the process returns to step S109.

  In the flowchart of FIG. 2, the process is terminated by powering off or a process termination interrupt.

  Next, an example of operation | movement of the control apparatus 20 of the information system 1 is demonstrated using the flowchart of FIG.

  (Step S201) The acquisition destination request receiving unit 201 determines whether acquisition destination request information has been received. If received, the process proceeds to step S202. If not received, the process proceeds to step S204.

  (Step S <b> 202) The load acquisition unit 203 acquires the acquisition destination information indicating the second server device 30 with a low load from the acquisition destination storage unit 202.

  (Step S203) The acquisition destination transmission unit 204 transmits the acquisition destination information acquired in Step S202 to the first server device 10. Then, the process returns to step S201.

  (Step S <b> 204) The load acquisition unit 203 determines whether it is time to acquire the load information of the second server device 30. For example, when the current time becomes a predesignated time or every time a predesignated time elapses, it is determined that it is the acquisition timing. If it is time to acquire, the process proceeds to step S205. If it is not time to acquire, the process returns to step S201.

  (Step S205) The load acquisition unit 203 substitutes 1 as the value of the counter m.

  (Step S206) The load acquisition unit 203 acquires the load information of the m-th second server device 30. For example, a command for requesting load information is transmitted to the m-th second server device 30, and load information transmitted from the m-th second server device 30 is received in response to the command.

  (Step S207) The load acquisition unit 203 stores the load information received in step S206 in the acquisition destination storage unit 202 in association with the acquisition destination information corresponding to the m-th second server device 30. Note that similar information may be stored in a storage medium (not shown).

  (Step S208) The load acquisition unit 203 increments the value of the counter m by 1.

  (Step S209) The load acquisition unit 203 determines whether or not there is the m-th second server device 30. If there is, the process returns to step S206, and if not, the process returns to step S201.

  In the flowchart of FIG. 3, the process ends when the power is turned off or the process is terminated.

  Next, an example of operation | movement of the 2nd server apparatus 30 of the information system 1 is demonstrated using the flowchart of FIG.

  (Step S <b> 301) The second instruction receiving unit 301 determines whether or not a first acquisition instruction has been received from the first server device 10. If received, the process proceeds to step S302. If not received, the process proceeds to step S304.

  (Step S302) The second information acquisition unit 303 acquires information corresponding to the first instruction from the second information storage unit 301 in response to the first acquisition instruction received in step S301.

  (Step S <b> 303) The second transmission unit 304 transmits information corresponding to the first instruction acquired in Step S <b> 302 to the first server device 10. Then, the process returns to step S301.

  (Step S <b> 304) The second server device 30 determines whether information for acquiring load information, such as a command, has been received from the control device 20. If received, the process proceeds to step S305. If not received, the process returns to step S301.

  (Step S <b> 305) The second server device 30 acquires the load information corresponding to the information for acquiring the load information received in step S <b> 304, and transmits the load information to the control device 20. Then, the process returns to step S301.

  In the flowchart of FIG. 4, the process ends when the power is turned off or the process ends.

  Next, the operation of the terminal device 40 will be briefly described. A terminal transmission unit (not shown) of the terminal device 40 transmits a first instruction to the first server device 10 in response to an operation received by a reception unit (not shown) from the user. A terminal receiving unit (not shown) receives information transmitted from the first server device 10 in response to the first instruction, and a terminal output unit (not shown) outputs information received by the terminal receiving unit. .

  Hereinafter, an example of a specific operation of the information system 1 in the present embodiment will be described. A conceptual diagram of the information system 1 is shown in FIG. Here, for the sake of explanation, it is assumed that the information system 1 has five second server devices 30. Here, each 2nd server apparatus 30 is represented by 2nd server apparatus 30a-30e. Different IP addresses are assigned to the second server devices 30a to 30e. The IP address of the second server device 30a is “123.123.xxx.xx1”, and the IP address of the second server device 30b is “123.123.xxx.xx2”, the IP address of the second server device 30c is “123.123.xxx.xx3”, and the IP address of the second server device 30d is “123.123.xxx.xx4”, The IP address of the second server device 30e is assumed to be “123.123.xxx.xx5” (provided that x is an arbitrary number).

  Assume that a user operating the terminal device 40 inputs the URL of one WEB page provided by a WEB server device (not shown) into a WEB browser (not shown) running on the terminal device 40.

  The terminal device 40 receives WEB page information transmitted from a WEB server device (not shown). Here, it is assumed that the received information on the WEB page describes information for acquiring information on a plurality of advertisements (hereinafter referred to as advertisement information) arranged on the WEB page. The information for acquiring the advertisement information is, for example, a tag having a program for acquiring the advertisement information described at the position where the advertisement is arranged. For example, this tag is called an ad tag. The program for acquiring the advertisement information is, for example, a program for causing the WEB browser of the terminal device 40 to execute a process for acquiring the advertisement information. For example, this program is assumed to be a program described in so-called Java Script (registered trademark) or the like.

  Using the WEB browser, the terminal device 40 interprets and executes programs included in a plurality of ad tags included in the received information on the WEB page, and issues a first instruction that instructs acquisition of advertisement information corresponding to each ad tag. It transmits sequentially and acquires advertisement information. For example, it is assumed that three ad tags are arranged on the WEB page, and the terminal device 40 sequentially transmits a first instruction corresponding to each ad tag. Here, the three first instructions to be sequentially transmitted are the first instructions R1-R3, and the first instruction R1 is first transmitted. Here, it is assumed that the first server device 10 is designated as the transmission destination of each first instruction by the ad tag, and the first instruction corresponding to the ad tag included in this WEB page is sent to the first server device 10. Shall be sent.

  Here, for example, it is assumed that the terminal device 40 stores information indicating a browsing state of the WEB page by the terminal device 40 called a cookie. Here, the cookie that the terminal device 40 has is referred to as a cookie CK1. It is assumed that the cookie CK1 is a cookie associated with the information system 1, for example, a cookie stored when browsing the WEB site related to the information system 1 with the terminal device 40. The cookie CK1 includes, for example, a character string that frequently appears in a WEB page output by the WEB browser of the terminal device 40, a keyword in a meta tag in the WEB page, identification information of the terminal device 40, and user login information. One or more pieces of information indicating information on a browsing history of a WEB page browsed by the WEB browser of the terminal device 40, information on a search keyword used for a search performed on the WEB page browsed by the WEB browser, and the like are stored. It shall be. Alternatively, identification information associated with these pieces of information is stored in a recording medium (not shown) accessible by two or more second server devices 30 or the like.

  Then, it is assumed that the terminal device 40 transmits the first instruction R1 having the cookie CK1 to the first server device 10. For example, it is assumed that the first instruction R1 has a cookie CK1 and a command for requesting information corresponding to the cookie CK1.

  The first instruction receiving means 101 of the first server device 10 receives the first instruction R1 transmitted from the terminal device 40. When the first instruction receiving unit 101 receives the first instruction R1, the first instruction transmitting unit 102 reads the second server identifier of one second server device 30 stored in advance in a storage medium (not shown). Here, it is assumed that the one second server identifier stored in advance is the IP address of the second server device 30a, and the read IP address is “123.123.xxx.xx1” (where x is an arbitrary address) Suppose it is a number).

  The first instruction receiving unit 101 uses the IP address read out above as a first acquisition instruction, which is an instruction to acquire information corresponding to the first instruction R1 received from the terminal device 40, as a second server apparatus. 30 to the second server device 30a. The first acquisition instruction to be transmitted is, for example, the same information as the first instruction R1 described above here.

  When the second instruction receiving unit 302 of the second server device 30a receives the first acquisition instruction transmitted from the first server device 10, the second information acquisition unit 303 reads the cookie CK1 included in the first acquisition instruction. The information corresponding to the cookie CK1 is acquired from the second information storage unit 301.

  FIG. 6 is an advertisement information management table for managing advertisement information stored in the second information storage unit 301. The advertisement information management table has attributes such as “ID”, “advertisement information”, “advertiser”, “business type”, and “keyword”. “ID” is an identifier for managing the record of the advertisement information management table. “Advertisement information” is advertisement information, and here, the file name of the image of the advertisement information is shown. The advertisement information here is assumed to be an image, for example. “Advertiser” is an advertiser name of the advertisement information, and is, for example, a corporate name here. “Business type” indicates the business name of the advertiser of the advertising information. The “keyword” is a keyword related to the advertisement. Moreover, you may have the priority information etc. which transmit advertisement information as another attribute. Of the attributes other than “ID” and “advertisement information” managed in the advertisement information management table, attributes that are not used when the second information acquisition unit 303 acquires advertisement identification information may be omitted. .

  The second information acquisition unit 303 acquires advertisement information corresponding to the first instruction from the advertisement information stored in the second information storage unit 301. For example, the second information acquisition unit 303 uses the advertisement information management table shown in FIG. 6, the keyword that frequently appears on the WEB page browsed by the terminal device 40 that the cookie CK1 included in the first acquisition instruction has, Advertisement information corresponding to information such as keywords in the meta tag, browsing history of the WEB page of the terminal device 40, information on search keywords used in the past, and user login information is acquired.

  In addition, since the process which acquires the advertisement information corresponding to the terminal device 40 or a user using information, such as a cookie, is a well-known technique, detailed description is abbreviate | omitted here. Further, the second information acquisition unit 303 may acquire the advertisement information corresponding to the first instruction by processing other than the above, which is used for normal advertisement distribution.

  In addition, when information such as the above frequently used keywords and browsing history is not stored in the cookie, and these information are stored in a storage medium (not shown) in association with the cookie identifier, etc., For example, advertisement information is acquired as follows.

  For example, an identifier included in a cookie stored in the terminal device 40 in advance and information used for acquiring advertisement information corresponding to the terminal device 40 (or a user of the terminal device 40), for example, by the terminal device 40 or the user The first management information (not shown) in which the browsing history of the WEB page and the search keyword information used in the past are associated is stored in a storage medium (not shown) accessible by the second information acquisition unit 303. To be. Then, from the first management information stored in the storage medium (not shown), the information used for acquiring the advertisement information associated with the identifier included in the cookie included in the first instruction is converted into the second information acquisition unit 303. And the like, and the advertisement information corresponding to the first instruction may be acquired using the information used for acquiring the advertisement information and the advertisement information management table as shown in FIG.

  Here, for example, it is assumed that the second information acquisition unit 303 has acquired the advertisement information “A1001001.png” as the advertisement information corresponding to the first instruction R1 by the processing as described above.

  The second transmission unit 304 of the second server device 30 a transmits the advertisement information “A1001001.png” acquired by the second information acquisition unit 303 to the first server device 10.

  The first information receiving unit 103 of the first server device 10 receives the advertisement information “A1001001.png” from the second transmitting unit 304 of the second server device 30a. The first information transmitting unit 104 transmits the advertisement information “A1001001.png” received by the first information receiving unit 103 to the terminal device 40 that is the transmission source of the first instruction R1.

  The terminal receiving unit (not shown) of the terminal device 40 receives the advertisement information “A1001001.png” transmitted from the first server device 10 in response to the first instruction R1, and the output unit (not shown) of the terminal device 40 is described above. The advertisement information “A1001001.png” is arranged in an area specified by an ad tag corresponding to the first instruction R1 on a WEB page transmitted from a WEB server apparatus (not shown).

  Furthermore, a terminal transmission unit (not shown) of the terminal device 40 transmits a first instruction R2 having the same cookie CK1 as described above to the first server device 10, and the first server device 10 is designated in advance as described above. The first acquisition instruction is transmitted to the second server device 30a which is one second server device 30. The second server device 30a acquires advertising information corresponding to the first instruction R2 by the same processing as described above, and transmits the acquired advertising information to the first server device 10. Here, it is assumed that the acquired advertisement information is “A1001002.png”. Then, the first server device 10 transmits this advertisement information to the terminal device 40, and an output unit (not shown) of the terminal device 40 responds to the first instruction R2 of the WEB page transmitted from the above-described WEB server device (not shown). The advertisement information is arranged in the area designated by the corresponding ad tag.

  The same process is performed for the first instruction R3. It is assumed that the advertisement information acquired here is “A1001006.png”.

  Then, the output unit (not shown) of the terminal device 40 displays the WEB page on which the advertisement information acquired corresponding to the first instruction R1-R3 is arranged on a monitor (not shown).

  FIG. 7 is a diagram illustrating a display example of a WEB page on which advertisement information is arranged by the terminal device 40.

  The advertisement information acquired by the second server device 30a in response to different first instructions having the same cookie CK1 is preferably advertisement information that does not overlap. For example, for advertisement information acquired for one cookie, information indicating this cookie, for example, an identifier of the cookie, etc. is associated with the information for a certain period of time and temporarily stored in the second information storage unit 301 or the like. The second information acquisition unit 303 does not acquire advertisement information associated with information indicating the same cookie as the cookie included in the first instruction, which is the first acquisition instruction, as advertisement information corresponding to the first instruction. This prevents duplicate advertisements from being acquired.

  Here, in the above, if the first instruction transmission unit 102 of the first server device 10 transmits the first acquisition instruction corresponding to the first instruction R2 to the specific second server device 30a, Since the CPU load and the input / output load of the server device 30a are high, the second server device 30a sends the advertisement information to the first server device before the time specified in advance has elapsed since the transmission of the first acquisition instruction. 10 could not be transmitted.

  The first instruction transmission unit 102 corresponds to the first instruction R2 from the time when the first acquisition instruction corresponding to the first instruction R2 is transmitted until a predetermined time elapses. Since the advertisement information could not be received, it is determined that the advertisement information corresponding to the first instruction cannot be received from one second server device 30a specified for the first server device 10.

  For this reason, the acquisition destination request transmission unit 105 transmits acquisition destination request information to the control device 20.

  FIG. 8 is an acquisition destination information management table for managing acquisition destination information stored in the acquisition destination storage unit 202 of the control device 20. The acquisition destination information management table has attributes of “acquisition destination” and “load”. “Acquisition destination” is acquisition destination information, and here is second server identification information of each of the second server devices 30a-30e, specifically, an IP address of each of the second server devices 30. “Load” is a value indicating the load of the second server device 30, and here, as an example, it is assumed that the CPU usage rate (%).

  The load acquisition unit 203 of the control device 20 sends the second server device 30 indicated by the IP address that is the “acquisition destination” of each record (each row) of the acquisition destination information management table at a predetermined time, for example, every minute. In contrast, a command for instructing transmission of a value indicating the usage rate of the CPU is transmitted. And the load acquisition means 203 receives the value which shows the usage rate of CPU which each 2nd server apparatus 30 transmits according to a command as the information of the load of each 2nd server apparatus 30. FIG. Then, with the received load information, the value of “load” corresponding to each second server device 30 is updated, for example, overwritten.

  When the acquisition destination request receiving unit 201 of the control device 20 receives the acquisition destination request information from the first server device 10, the acquisition destination transmission unit 204 has a second load with less load among the plurality of second server devices 30 a-30 b. Acquisition destination information of the server device 30a is acquired. Here, the acquisition destination transmission unit 204 acquires the “acquisition destination” value of the record having the smallest “load” value in the acquisition destination information management table shown in FIG. In FIG. 8, “123.123.xxx.xx2”, which is the value of “acquisition destination” of the record whose “load” value is “13 (%)”, is acquired. Then, the acquired acquisition destination information is transmitted to the first server device 10.

  Here, the CPU usage rate information is used as the load information of the second server device 30, but in addition to the CPU usage rate or instead of the CPU usage rate, the memory usage rate or One or more pieces of information indicating other loads such as the number of simultaneous connections may be used. Here, the acquisition destination information of the second server device 30 with the lowest load is acquired, but the acquisition destination information of the second server device 30 with the lowest load is not necessarily acquired. Further, the optimal acquisition destination information of the second server device 30 may be acquired from information on a plurality of types of loads using a known algorithm for load distribution specified in advance.

  The acquisition destination receiving means 106 of the first server device 10 receives the acquisition destination information “123.123.xxx.xx2” from the control device 20. Then, the first instruction transmitting unit 102 sends the first acquisition corresponding to the first instruction R2 to the second server device 30b indicated by the acquisition destination information “123.123.xxx.xx2” received by the acquisition destination receiving unit 106. Send instructions. Similar to the second server device 30a, the second server device 30b acquires the advertisement information corresponding to the first instruction R2 according to the first acquisition instruction and transmits it to the first server device 10. The first server device 10 transmits advertisement information corresponding to the first instruction R2 acquired by the second server device 30b to the terminal device 40.

  In this way, when the information corresponding to the first instruction R2 cannot be acquired from one second server device 30a, the advertisement information is acquired from the second server device 30b indicated by the acquisition destination information transmitted from the control device 20. Therefore, it is possible to avoid a situation in which advertisement information corresponding to the first instruction cannot be acquired.

  In the above specific example, the case where a cookie is used has been described. Instead of a cookie, a request source of advertisement information such as the terminal device 40, its user, or a WEB page to be output by the terminal device 40 is used. You may make it use the information which can identify these. By using information that can identify the request source of such advertisement information, for example, it is possible to acquire advertisement information according to the request source. Further, it is possible not to acquire duplicate advertisement information for the same request source.

  As described above, according to the present embodiment, information corresponding to the first instruction can be acquired from one second server device specified for the first server device, and first information can be obtained from the second server device. When the information corresponding to the instruction cannot be acquired, the information corresponding to the first instruction can be acquired from the second server device indicated by the acquisition destination information transmitted by the control device. Information corresponding to the first instruction can be acquired preferentially from the apparatus, and information can be reliably acquired from the other second server apparatus when the information cannot be acquired from one second server apparatus.

  Thereby, when the information acquired from the second server device is advertisement information, the second server device that normally acquires the advertisement information is a specific second server device. It is possible to easily manage the history of the acquired advertisement information and the like, and it is possible to easily not acquire the duplicate advertisement information in response to the first instruction transmitted from the same terminal device or the like. On the other hand, when the advertising information cannot be acquired from one specific second server device, the advertising information cannot be acquired because the advertising information can be acquired from the other second server device indicated by the acquisition destination information. That is, it is possible to avoid a situation in which advertisement information cannot be output.

  Moreover, since the information acquired by the second server device can be transmitted to the terminal device that transmitted the first instruction via the first server device, the terminal device is the first server that is the transmission destination of the first instruction. Information can be acquired from the apparatus, and management of information such as security becomes easy.

  In addition, since the control device transmits the acquisition destination information of the second server device having a low load to the first server device, when the advertising information cannot be acquired from a specific second server device, the acquisition of the advertising information is performed. It becomes possible to acquire advertisement information from the second server device that is easy to perform, and the advertisement information can be acquired reliably.

  In addition, for example, information stored in the second information storage unit 301 of a specific second server device is original information such as advertisement information accumulated by a terminal device or the like, for example, image information such as a photograph. If the information stored in the specific second server device is backed up by a predetermined schedule or the like, usually, the specific second server device Since the original information stored in the apparatus can be acquired by the first server apparatus and transmitted to the terminal apparatus, the latest original information can always be provided to the terminal apparatus, and the second server apparatus If the original information cannot be obtained from the server, the information backed up from another second server device can be provided. The backed up information is not necessarily the latest information, but providing the backed up information can avoid the situation where the information instructed to obtain cannot be provided.

  In the present invention, one or more second server devices may be composed of a plurality of server devices. For example, the one or more second server devices may be configured by a plurality of server devices arranged in parallel, or are configured by a plurality of server devices that are hierarchized or a plurality of server devices that are connected in series. May be.

  FIG. 9 is a schematic diagram for explaining a modification of the information system according to the present embodiment. The second server device 31 of this information system is a server device that is used in place of the second server device 30, and is a server device that includes a plurality of server devices.

  The second server device 31 includes a load distribution server device 311, two or more second control devices 312, and two or more third server devices 313. Although not shown, the load distribution server device 311 includes the second instruction receiving unit 302 described above. Each third server device 313 includes a second information storage unit 301, a second information acquisition unit 303, and a second transmission unit 304, which are not shown. Here, as an example, a case will be described in which four or more second control devices 312a to 312d and four or more third server devices 313a to 313d are provided. However, the number of the second control device 312 and the third server device 313 may be two or more.

  It is assumed that the load distribution server device 311 and two or more second control devices are connected to be communicable. In addition, it is assumed that two or more second control devices and two or more third server devices 313 are communicably connected.

  The load distribution server device 311 is a server device for distributing the load. Here, for example, the load distribution server device 311 is a server device for distributing a process of acquiring advertisement information. The load distribution server device 311 is, for example, a so-called load balancer. Since the configuration and operation of the load balancer are known techniques, detailed description thereof is omitted here.

  When the load distribution server device 311 receives the first acquisition instruction transmitted by the first server device 10, the load distribution server device 311 transmits the received first acquisition instruction to two or more second acquisition instructions in order to distribute the load. It transmits to any one of the control devices 312.

  The second control device 312 is a server device for assigning the first acquisition instruction received from the load distribution server device 311 to any one of two or more third server devices 313. To one of the third server devices 313.

  The second control device 312 transmits a first acquisition instruction corresponding to the first instruction transmitted for the same request source to the same third server device 313. The first instruction transmitted for the same request source acquires the first instruction transmitted from the same terminal device 40, the same user, or the advertisement information arranged on one WEB page output from the terminal device 40. A plurality of first instructions for.

  The second control device 312 transmits, for example, a first instruction including information indicating the same request source to the same third server device 313. The information indicating the request source is, for example, the cookie as described above, the IP address of the terminal device 40, or the like.

  Specifically, each second control device 312 has the same management information in which the last value of the hash value of the information indicating the request source is associated with one of the plurality of third server devices 313 in advance. For the information indicating the request source included in the first acquisition instruction, the hash value is acquired by a common algorithm, and the third server device 313 associated with the value matching the acquired end value is managed information To detect. Then, the first acquisition instruction is transmitted to the detected third server device 313. Accordingly, the first acquisition instruction having information indicating the same request source, that is, the first acquisition instruction corresponding to the first instruction transmitted for the same request source can be transmitted to the same third server device 313. A value at a specific position of the hash value may be used instead of the value at the end of the hash value. When ten or more third server devices 313 are provided, a multi-digit value in the hash value may be used.

  The third server device 313 is a server device that acquires and transmits advertisement information corresponding to the first instruction. When each third server device 313 receives the first acquisition instruction from the second control device 312, the second information acquisition means 303 of the third server device 313 stores the second information as in the above-described embodiment and the like. The advertisement information corresponding to the first instruction is acquired from the means 301 and transmitted to the terminal device 40. In addition, it is preferable that the 3rd server apparatus 313 acquires different advertisement information with respect to the some 1st instruction | indication transmitted about the same request source. For example, when the third server device 313 acquires one piece of advertisement information, the third server device 313 associates information indicating a request source such as a cookie included in the first instruction with the acquired advertisement information, and is designated in advance. When the advertisement information is acquired for the first instruction newly stored in the second information storage means 301 or the like only for the time, the advertisement information associated with the information indicating the request source included in the first instruction is Don't get it. Thereby, it is possible to prevent duplicate advertisement information from being transmitted to the same request source.

  Hereinafter, the operation of the modified example will be briefly described. Similar to the above-described specific example, three first instructions R1 having the same cookie CK1 for obtaining advertisement information arranged on one WEB page are obtained. It is assumed that -R3 is sequentially transmitted from the terminal device 40. And the 1st server apparatus 10 shall transmit the 1st acquisition instruction corresponding to these 1st instructions to one specific 2nd server apparatus 31. FIG.

  For example, it is assumed that the load distribution server device 311 transmits a first acquisition instruction corresponding to the first instruction R1 received from the first server device 10 to the second control device 312a. The second control device 312 acquires the hash value of the cookie CK1 included in the first acquisition instruction, and acquires the last value. If the end value is “2”, the third server device 313 associated with the end value “2” is detected from the management information prepared in advance. Here, for example, it is assumed that the third server device 313b is detected. For this reason, the second control device 312a transmits a first acquisition instruction corresponding to the first instruction R1 to the third server device 313b.

  The third server device 313b acquires the advertisement information corresponding to the first instruction R1 according to the first acquisition instruction corresponding to the first instruction R1, and transmits it to the terminal device 40. The advertisement information may be transmitted directly to the terminal device 40 or may be transmitted indirectly via the first server device 10 or the like. Further, the acquired advertisement information is associated with the cookie CK1 included in the first instruction R1 and the acquisition time.

  Further, it is assumed that the load distribution server device 311 transmits a first acquisition instruction corresponding to the first instruction R2 received from the first server device 10 to the second control device 312b. The second control device 312 acquires the hash value of the cookie CK1 included in the first acquisition instruction and acquires the value at the end thereof. The cookie included in the first instruction R2 and the cookie included in the first instruction R1 Is the same cookie, the last value of the hash value is “2” as described above, and the second control device 312b sends the first acquisition instruction corresponding to the first instruction R2 to the third server device 313b. Send.

  The third server device 313b acquires the advertisement information corresponding to the first instruction R2 according to the first acquisition instruction corresponding to the first instruction R2, and transmits it to the terminal device 40. At this time, the advertisement information associated with the acquisition time whose elapsed time up to the present time is within the time specified in advance and not associated with the cookie CK1 is not acquired. Thereby, the advertising information acquired corresponding to the first instruction R1 and the advertising information acquired corresponding to the first instruction R2 can be made different advertising information.

  Further, it is assumed that the load distribution server device 311 transmits a first acquisition instruction corresponding to the first instruction R3 received from the first server device 10 to the second control device 312d. The second control device 312 acquires the hash value of the cookie CK1 included in the first acquisition instruction and acquires the value at the end thereof. The cookie included in the first instruction R3 and the cookie included in the first instruction R1 Is the same cookie, the value at the end of the hash value is “2” as described above, and the second control apparatus 312d sends a first acquisition instruction corresponding to the first instruction R3 to the third server apparatus 313b. Send.

  The third server device 313b acquires the advertisement information corresponding to the first instruction R3 according to the first acquisition instruction corresponding to the first instruction R3, and transmits it to the terminal device 40. At this time, the advertisement information associated with the acquisition time whose elapsed time up to the present time is within the time specified in advance and not associated with the cookie CK1 is not acquired. Thereby, the advertising information acquired corresponding to the first instruction R1 and the first instruction R2 and the advertising information acquired corresponding to the first instruction R3 can be set as different advertising information.

  In this way, by configuring the second server device with a plurality of server devices, the processing of the second server device can be distributed, and the processing speed can be increased.

  In addition, by using the hash value calculated from cookies, etc., the first instruction sent for the same request source is sent to the same third server device so that duplicate advertising information is not sent to the same request source. It becomes possible to.

  In the above embodiment, two or more communication means (first instruction receiving means, first instruction transmitting means, first information receiving means, etc.) existing in one apparatus are physically realized by one medium. Needless to say.

  In the above embodiment, each component may be configured by dedicated hardware, or a component that can be realized by software may be realized by executing a program. For example, each component can be realized by a program execution unit such as a CPU reading and executing a software program recorded on a recording medium such as a hard disk or a semiconductor memory. At the time of execution, the program execution unit may execute the program while accessing a storage unit (for example, a recording medium such as a hard disk or a memory).

  The software that realizes the information system in the above embodiment is the following program. In other words, the program causes the computer to receive a first instruction receiving unit that receives a first instruction that is an instruction to acquire information from the terminal device, and two or more second instructions when the first instruction receiving unit receives the first instruction. First instruction transmitting means for transmitting an instruction to acquire information corresponding to the first instruction to one second server apparatus of the two server apparatuses; and information corresponding to the first instruction as one second server apparatus Acquisition that requests acquisition destination information that is information indicating the second server device that is the acquisition destination of information corresponding to the first instruction of the two or more second server devices when the information cannot be received from the control device It functions as an acquisition destination request transmission means for transmitting the destination request information and an acquisition destination reception means for receiving the acquisition destination information corresponding to the acquisition destination request information from the control device. The information corresponding to If you can not receive from the server apparatus, a program for transmitting an instruction for acquisition of information corresponding to the first instruction to the second server device indicated by the obtained destination information received by the acquisition source receiving means.

  In the program, the functions realized by the program do not include functions that can be realized only by hardware. For example, a function that can be realized only by hardware such as a modem or an interface card in an acquisition unit that acquires information or an output unit that outputs information is not included in the function realized by the program.

  Further, the computer that executes this program may be singular or plural. That is, centralized processing may be performed, or distributed processing may be performed.

  FIG. 10 shows the external appearance of a computer that can execute the program and can implement the first server device 10, the control device 20, the second server device 30, and the terminal device 40 that constitute the information system according to the embodiment. It is a schematic diagram which shows an example. The above-described embodiment can be realized by computer hardware and a computer program executed on the computer hardware.

  In FIG. 10, a computer system 900 includes a computer 901 including a CD-ROM (Compact Disk Read Only Memory) drive 905, a keyboard 902, a mouse 903, and a monitor 904.

  FIG. 11 is a diagram showing an internal configuration of the computer system 900. In FIG. 11, in addition to the CD-ROM drive 905, a computer 901 is connected to an MPU (Micro Processing Unit) 911, a ROM 912 for storing a program such as a bootup program, and the MPU 911, and receives instructions of an application program. A RAM (Random Access Memory) 913 that temporarily stores and provides a temporary storage space, a hard disk 914 that stores application programs, system programs, and data, and a bus 915 that interconnects the MPU 911, ROM 912, and the like Prepare. The computer 901 may include a network card (not shown) that provides connection to the LAN.

  A program that causes the computer system 900 to execute functions such as the information system according to the above-described embodiment may be stored in the CD-ROM 921, inserted into the CD-ROM drive 905, and transferred to the hard disk 914. Instead, the program may be transmitted to the computer 901 via a network (not shown) and stored in the hard disk 914. The program is loaded into the RAM 913 when executed. The program may be loaded directly from the CD-ROM 921 or the network.

  The program does not necessarily include an operating system (OS) or a third-party program that causes the computer 901 to execute the functions of the information system according to the above embodiment. The program may include only a part of an instruction that calls an appropriate function (module) in a controlled manner and obtains a desired result. How the computer system 900 operates is well known and will not be described in detail.

  The “means” of each means in the present invention may be read as “part” or “circuit”.

  The present invention is not limited to the above-described embodiments, and various modifications are possible, and it goes without saying that these are also included in the scope of the present invention.

  As described above, the information system according to the present invention is suitable as a system for providing information in response to a request from a terminal device, and is particularly useful as a system for providing advertisement information or the like.

DESCRIPTION OF SYMBOLS 1 Information system 10 1st server apparatus 20 Control apparatus 30, 31 2nd server apparatus 40 Terminal apparatus 101 1st instruction | indication receiving means 102 1st instruction | indication transmission means 103 1st information receiving means 104 1st information transmission means 105 Acquisition destination request | requirement transmission Means 106 Acquisition destination reception means 201 Acquisition destination request reception means 202 Acquisition destination storage means 203 Load acquisition means 204 Acquisition destination transmission means 301 Second information storage means 302 Second instruction reception means 303 Second information acquisition means 303 First information acquisition means 304 Second transmission means 311 Load distribution server device 312 Second control device 313 Third server device

Claims (8)

An information system comprising a first server device, a control device, and two or more second server devices,
The first server device is
First instruction receiving means for receiving from the terminal device a first instruction that is an instruction to acquire information;
When the first instruction receiving unit receives the first instruction, a first instruction transmitting unit that transmits an instruction to acquire information corresponding to the first instruction to a specific second server device;
An acquisition destination that is information indicating a second server device that is an acquisition destination of information corresponding to the first instruction to the control device when information corresponding to the first instruction cannot be received from the specific second server device. An acquisition destination request transmission means for transmitting acquisition destination request information which is information for requesting information;
An acquisition destination receiving means for receiving acquisition destination information corresponding to the acquisition destination request information from the control device,
The first instruction transmission means sends the first instruction to the second server device indicated by the acquisition destination information received by the acquisition destination reception means when the information corresponding to the first instruction cannot be received from the specific second server device. Send an instruction to obtain information corresponding to one instruction,
The controller is
Acquisition destination request receiving means for receiving acquisition destination request information from the first server device;
When the acquisition destination request receiving means receives the acquisition destination request information, the acquisition destination information indicating any one of the two or more second server devices is transmitted to the first server device. Acquisition destination transmission means to
The second server device is
Second information storage means for storing one or more pieces of information;
Second instruction receiving means for receiving an instruction to obtain information corresponding to the first instruction;
Second information acquisition means for acquiring information corresponding to the first instruction from the second information storage means;
The information system provided with the 2nd transmission means which transmits the information which said 2nd information acquisition means acquired to the said terminal device. The first server device is
First information receiving means for receiving information corresponding to the first instruction from the specific second server device in response to an instruction to acquire information corresponding to the first instruction transmitted by the first instruction transmitting means;
Further comprising first information transmitting means for transmitting the information received by the first information receiving means to the terminal device;
The first information receiving means is a second server device in which the acquisition destination information indicates information corresponding to the first instruction in response to an instruction to acquire information corresponding to the first instruction transmitted by the first instruction transmitting means. Received from
The information system according to claim 1, wherein the second transmission unit transmits the information acquired by the second information acquisition unit to the first server device that has transmitted an instruction to acquire information corresponding to the first instruction. The information system according to claim 1, wherein the information is advertisement information. The information system according to any one of claims 1 to 3, wherein the acquisition destination transmission unit transmits acquisition destination information indicating a second server device other than the specific second server device. The 1st server apparatus with which the information system as described in any one of Claims 1-4 is equipped . First instruction receiving means for receiving from the terminal device a first instruction that is an instruction to acquire information;
When the first instruction receiving means receives the first instruction, the first instruction receiving means transmits an instruction to acquire information corresponding to the first instruction to a specific second server apparatus among the two or more second server apparatuses. One instruction transmission means;
When the information corresponding to the first instruction cannot be received from the specific second server device, the control device becomes the acquisition destination of the information corresponding to the first instruction of the two or more second server devices. An acquisition destination request transmitting means for transmitting acquisition destination request information which is information for requesting acquisition destination information which is information indicating the two server devices;
An acquisition destination receiving means for receiving acquisition destination information corresponding to the acquisition destination request information from the control device,
The first instruction transmission means sends the first instruction to the second server device indicated by the acquisition destination information received by the acquisition destination reception means when the information corresponding to the first instruction cannot be received from the specific second server device. A first server device that transmits an instruction to acquire information corresponding to one instruction. An information processing method performed using a first instruction receiving unit, a first instruction transmitting unit, an acquisition destination request transmitting unit, and an acquisition destination receiving unit,
A first instruction receiving step in which the first instruction receiving means receives from the terminal device a first instruction that is an instruction to acquire information;
When the first instruction transmitting means receives the first instruction in the first instruction receiving step, information corresponding to the first instruction with respect to a specific second server apparatus among two or more second server apparatuses A first instruction transmission step of transmitting an acquisition instruction;
When the acquisition request sending means cannot receive information corresponding to the first instruction from the specific second server device, the control device responds to the first instruction of the two or more second server devices. An acquisition destination request transmission step of transmitting acquisition destination request information that is information for requesting acquisition destination information that is information indicating a second server device that is an acquisition destination of information to be acquired;
The acquisition destination receiving means includes an acquisition destination reception step of receiving acquisition destination information corresponding to the acquisition destination request information from the control device, and
In the first instruction transmission step, when the information corresponding to the first instruction cannot be received from the specific second server device, the first instruction transmission step indicates to the second server device indicated by the acquisition destination information received in the acquisition destination reception step. An information processing method for transmitting an instruction to acquire information corresponding to one instruction. Computer
First instruction receiving means for receiving from the terminal device a first instruction that is an instruction to acquire information;
When the first instruction receiving means receives the first instruction, the first instruction receiving means transmits an instruction to acquire information corresponding to the first instruction to a specific second server apparatus among the two or more second server apparatuses. One instruction transmission means;
When the information corresponding to the first instruction cannot be received from the specific second server device, the control device becomes the acquisition destination of the information corresponding to the first instruction of the two or more second server devices. An acquisition destination request transmitting means for transmitting acquisition destination request information which is information for requesting acquisition destination information which is information indicating the two server devices;
It functions as an acquisition destination receiving means for receiving acquisition destination information corresponding to the acquisition destination request information from the control device,
The first instruction transmission means sends the first instruction to the second server device indicated by the acquisition destination information received by the acquisition destination reception means when the information corresponding to the first instruction cannot be received from the specific second server device. A program that transmits an instruction to acquire information corresponding to one instruction.

Images