JP5544903B2 - Server device and control program thereof - Google Patents

Description

  The present invention relates to an HTTP (Hyper Text Transfer Protocol) tunnel server device interposed in the middle of a communication path between a server device and a client device in a server / client system, and a control program therefor.

  In a server / client system, a server device and a client device may not communicate directly but may communicate via an HTTP tunnel server device interposed in the middle of a communication path between the server device and the client device.

  The HTTP tunnel server device has a function of converting a protocol when transferring arbitrary TCP (Transmission Control Protocol) data from a client device to a server device of an HTTP port, for example, or the client device and the server device When the request and response between the two are simply passed through and transferred, the communication is recorded.

  FIG. 4 is a diagram showing an operation sequence in a server / client system using a conventional HTTP tunnel server [Server (HTTP Tunnel)].

  In the conventional HTTP tunnel server apparatus [Server (HTTP Tunnel)], when any data is received from the client apparatus [Client], a response is immediately transmitted to the client apparatus [Client].

  That is, for example, when client data [Data (Client)] according to user input is received from the client device [Client], the client data [Data (Client)] is transferred to the server device [Server (Application)]. Immediately after that, that is, in a state where the server response data [Data (Server)] generated by the server apparatus [Server (Application)] is not sent in response to the client data [Data (Client)], the client apparatus [Client Empty response data [Data (NULL)] must be sent to].

  For this reason, after receiving the empty data [Data (NULL)], the client device [Client] further transmits a data request [Request] to the HTTP tunnel server device [Server (HTTP Tunnel)]. Server response data [Data (Server)] generated by the server device [Server (Application)] and received by the HTTP tunnel server device [Server (HTTP Tunnel)] is received as a response to the data request [Request]. .

  Therefore, particularly in a network environment with a large transmission delay, the server response data [Data (Client)] generated by the server device [Server (Application)] according to the actual data [Data (Client)] transmitted from the client device [Client]. (Server)] is transferred to the client device [Client] and received, and a lot of wasted time [Loss] is included, resulting in poor response performance.

  Therefore, when any data is received from the client device, the response data is not immediately returned to the client device, but waits. When the server response data generated by the server device is received, the server response data is immediately An HTTP tunneling server for transferring to a client device is considered (for example, see Patent Document 1).

  According to this, when the server response data [Data (Server)] generated by the server device is received, the HTTP tunneling server does not wait for reception of the next data request [Request] from the client device. The server response data [Data (Server)] can be transferred to the client device immediately.

JP 2004-151964 A

  According to the conventional HTTP tunneling server, server response data [Data (Server)] generated by the server device in response to actual data [Data (Client)] by user input from the client device is transferred to the client device. When it is necessary to do so, response time can be improved without generating wasted time [Loss].

  However, the conventional HTTP tunneling server is not limited to the case where the actual data [Data (Client)] is received by the user input from the client device, but the case where, for example, the data request [Request] that is merely polling is received. In addition, the process shifts to a standby process without returning the response data.

  For this reason, as a client device, some server data [Data (Server)] for moving image update or the like is transmitted from the server device even though the data request [Request] that is merely polling is transmitted. Until the standby processing in the HTTP tunneling server is canceled and the server data [Data (Server)] is received, data corresponding to the next polling or user input cannot be transmitted.

  Therefore, unless the server response data is generated and transmitted promptly and normally by the server device in accordance with the actual data transmitted from the client device, the standby processing in the HTTP tunneling server is the response between the client and the server. There is a problem that the efficiency is worsened.

The present invention has been made in view of such problems, and an object thereof is to provide a can in such Rusa over server apparatus and a control program to be significantly improved les Suponsu performance.

The servers apparatus according to claim 1, based on the response time of the response time acquisition means for acquiring a response time of the other server devices, another server device obtained by the response time acquisition unit, of the other Wait time setting means for setting a wait time for waiting for a response from the server device, and when the received data is real data when the data is received from the client device, the real data is transmitted to another server device After that, a response reception determination unit that determines whether or not server response data is received from the other server device within the standby time set by the standby time setting unit, and a time outside the standby time by the response reception determination unit when receiving actual data from said other server apparatus, the server the actual data storage means for storing the actual data received, within the waiting time by the response reception determination means When said other server device the server response data is determined to have been received, the the server response data and waits a response data transmission means for transmitting to the client device, in the waiting time by the response reception determination means When it is determined that server response data is not received from another server device, response data transmission means after waiting for transmitting response data not including actual data to the client device, and data received from the client device are real data If the actual data received from the other server device is stored by the server actual data storage means, the stored actual data is immediately used as response data for the client. To the other server device by the server actual data storage means. Actual data was received if it is not stored, and the request response data transmitting means for transmitting the response data does not include the actual data immediately to the client apparatus, comprising the from.

According to a fourth aspect of the present invention, there is provided a server device that responds to a request from a client device, wherein the first determination unit determines whether the request from the client device is a request type including an input event, and the first determination. If it is determined that the request type includes the input event, the request is transmitted to another server device and generated in response to the request outside the waiting time for waiting for a response after the request. when it receives the generated actual data from the other server device which is a storage control unit for storing control received generated real data in the storage means, when there is a request from the client device, the storage means a second discriminating means for the generation actual data it is determined whether or not stored in the case where the generated actual data is judged as being stored in the second discriminating means, the generation real data Transmitted as answer data to the client device, whereas, the said generating real data in the second determining means is determined not to be stored, it is determined that the it is in the do not contain an input event request type first determining means If the is characterized by comprising a request response transmit means for transmitting the response data indicating that the data generated is not to the client device.

The present invention can provide a can in such Rusa over server apparatus and a control program to be significantly improved les Suponsu performance.

1 is a block diagram showing a configuration of a server / client (Thin Client) system using an HTTP tunnel server device 10 according to an embodiment of the present invention. 6 is a flowchart showing the client process in the client apparatus 30 and the tunnel server process in the HTTP tunnel server apparatus 10 in the server-client (Thin Client) system in association with each other. FIG. 3 is a diagram showing a part of an operation sequence in a server / client system using the HTTP tunnel server device 10; The figure which shows the operation | movement sequence in the server client system using the conventional HTTP tunnel server apparatus [Server (HTTP Tunnel)].

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a block diagram showing a configuration of a server client system using an HTTP tunnel server device 10 according to an embodiment of the present invention.

  In this server-based computing system, a plurality of client devices (Thin Clients) 30 on a wireless or wired communication network N are connected from the server device 20 via the HTTP tunnel server device 10. Configured.

  First, the client device (Thin Client) 30 includes a terminal device such as a mobile phone, and includes a CPU (Central Processing Unit) 31 that is a control unit (computer).

  The CPU 31 is connected to a storage unit 33 made up of a flash ROM and RAM, an input unit 34 such as a keyboard, a display unit 35 made up of an LCD (Liquid Crystal Display), a communication control unit 36, and the like via a bus 32.

  The CPU 31 operates according to a terminal control program stored in advance in the storage unit 33 according to a signal input from the input unit 34 or a signal received from the HTTP tunnel server device 10 via the communication control unit 36. To control.

  In the storage unit 33, a transmission buffer 33a, a reception buffer 33b, a frame buffer 33c, and the like are secured.

  In the transmission buffer 33a, key input data or the like input in response to a user operation of the input unit 34 is temporarily stored, and the data stored in the transmission buffer 33a is transmitted from the communication control unit 36 to the HTTP tunnel server device 10. Is done.

  The reception buffer 33b stores display screen data received from the HTTP tunnel server device 10 via the communication control unit 36.

  In the frame buffer 33c, when screen data for display is stored in the reception buffer 33b, the screen data is expanded and stored as bitmap data, and the screen data stored in the frame buffer 33c is stored in the display. The data is output to the unit 35 and displayed.

  Next, the HTTP tunnel server device 10 includes a CPU 11 which is a control unit (computer).

  The CPU 31 includes a storage unit 13 including an HDD (Hard Disk Drive), a flash ROM, and a RAM, an input unit 14 such as a keyboard, a display unit 15 including an LCD (Liquid Crystal Display), and a communication control unit. 16, a storage medium reading unit 18 for reading various data stored in an external storage medium 17 such as a CD-ROM or a memory card is connected.

  The CPU 11 sends the communication control unit 16 from a tunnel server control program stored in advance in the storage unit 13, a tunnel server control program read from the external storage medium 17, or another server device (program server) on the communication network N. In accordance with the tunnel server control program downloaded through the communication control unit 16, the operation of each unit is controlled in accordance with a signal received from the client device 30 or the server device 20 through the communication control unit 16 or a signal input from the input unit 14. .

  The storage unit 13 includes a reception buffer 13a, a transmission buffer 13b, an actual wait time [αn] memory 13c, a total accumulated wait time [Σαi: i = 1 to n] memory 13d, a predetermined number of accumulated wait times [Σαi: i = n -9 to n] memory 13e, margin coefficient [β] memory 13f, first maximum wait time [(Σαi / n) × β: i = 1 to n] memory 13g, second maximum wait time [(Σαi / 10) × β: i = n−9 to n] The memory 13h and the like are secured.

  The reception buffer 13a stores input data according to user operations received from the client device 30 to the communication control unit 16 and data requests such as simple polling. The actual data stored in the reception buffer 13a is stored in the reception buffer 13a. It is transmitted to the server device 20.

  In the transmission buffer 13b, server response data and screen update data received from the server device 20 to the communication control unit 16 are temporarily stored. The actual data stored in the transmission buffer 13b is transmitted from the communication control unit 36. It is transmitted to the client device 30.

  In the actual wait time [αn] memory 13 c, a display screen generated according to the application program 21 of the server device 20 after transmitting the actual data from the client device 30 stored in the reception buffer 13 a to the server device 20. The response time until server response data such as data is actually received is stored as the actual wait time [αn].

  In the total accumulated wait time [Σαi: i = 1 to n] memory 13d, the actual wait time associated with the reception of the server response data from when the connection between the client device 30 and the server device 20 is established to the present [ The sum of [alpha] n] is stored as the total accumulated wait time [[Sigma] [alpha] i: i = 1 to n].

  The predetermined total accumulated wait time [Σαi: i = n−9 to n] memory 13e includes the total of the last ten actual wait times [αn] associated with the reception of the server response data. It is stored as Σαi: i = n-9 to n].

  In the margin coefficient [β] memory 13f, when actual data from the client device 30 stored in the reception buffer 13a is transmitted to the server device 20, server response data corresponding to the actual data is generated by the server device 20. In setting the maximum wait time for waiting without receiving a response to the client device 30 until it is received, the margin coefficient [β1] [for including an allowable value according to the fluctuation of the server response time β2] is stored.

  The margin coefficient [β1] is used to set the maximum wait time when the delay variation of the response from the server device 20 is small. For example, [β1 = 1.2] is used.

  The margin coefficient [β2] is used to set the maximum wait time when the delay variation of the response from the server device 20 is large, and is set to [β2 = 1.5], for example.

  The first maximum wait time [(Σαi / n) × β1: i = 1 to n] memory 13g does not respond to the client device 30 when the delay variation of the response from the server device 20 is small. The first maximum wait time [(Σαi / n) × β1: i = 1 to n] for waiting is the total accumulated wait time stored in the total accumulated wait time [Σαi: i = 1 to n] memory 13d. [Σαi: i = 1 to n], the number of times server response data is received from the server device 20 [n], and the margin coefficient [β] calculated based on the margin coefficient [β1] stored in the memory 13e. The

  In the second maximum wait time [(Σαi / n) × β2: i = n−9 to n] memory 13h, the response to the client device 30 is sent when the delay variation of the response from the server device 20 is small. The second maximum wait time [(Σαi / 10) × β2: i = n−9 to n] for waiting without waiting is stored in the predetermined accumulated cumulative wait time [Σαi: i = n−9 to n] memory 13e. It is calculated and stored based on the stored predetermined wait time [Σαi: i = n−9 to n] and the margin coefficient [β] stored in the memory 13e.

  The block configuration inside the server device 20 is substantially the same as the block configuration of the HTTP tunnel server device 10, but the configurations of various buffers and memories stored in the storage unit are different. In addition to the server control program stored in advance, the server device 20 stores various application programs 21 that are activated and executed in accordance with actual data associated with user input from the client device 30. .

  The HTTP tunnel server device 10 may be integrated with the server device 20.

  That is, a client device (Thin Client) 30 of this server client system (SBC system) has a function of transmitting input event data according to a user operation of the input unit 34 to the server device 20, and the transmitted input event data In response, a function of receiving display screen data generated according to the application program 21 executed by the server device 20 as server response data, a function of displaying the received display screen data on the display unit 34, and the server device 20 The basic function is to transmit a data request for periodically polling and receiving screen data for display that has been automatically updated as the application program 21 is executed.

  In addition, the server device 20 executes the application program 21 corresponding to the input event data transmitted from the client device 30, and generates a screen data for display corresponding to the execution content of the program. A function for transmitting the screen data of the above to the client device 30 as server response data, and when the screen data for display is automatically updated in accordance with the execution contents of the program, the updated screen data for display is transmitted at any time Function as a basic function.

  The HTTP tunnel server device 10 has the following basic functions (a) to (f).

(a) When display event data addressed to the client device 30 is received from the server device 20 and stored when input event data addressed to the server device 20 is received from the client device 30, the screen data Is immediately transmitted (transferred) to the client device 30, the received input event data is transmitted (transferred) to the server device 20, and a standby time (first or second maximum wait time) is set from the server device 30. A function of waiting for reception of display screen data corresponding to the input event data.

(b) When display screen data corresponding to the input event data is received from the server device 20 during the standby time (first or second maximum wait time), the screen data is transmitted (transferred) to the client device 30. ) Function to do.

(c) A function of transmitting empty response data to the client device 30 when display screen data corresponding to the input event data is not received from the server device 20 during the standby time (first or second maximum wait time). .

(d) When the input event data addressed to the server device 20 is received from the client device 30, if the data addressed to the client device 30 is not received from the server device 20, the received input event data is stored in the server A function of transmitting (transferring) to the device 20 and setting a standby time (first or second maximum wait time) and waiting for reception of display screen data corresponding to the input event data from the server device 30.

(e) When a screen request for display addressed to the client device 30 is received from the server device 20 and saved when a data request addressed to the server device 20 is received from the client device 30, the screen data is A function of transmitting (transferring) to the client device 30 immediately.

(f) When a data request addressed to the server device 20 is received from the client device 30 and no display screen data addressed to the client device 30 is received from the server device 20, empty response data is immediately displayed. A function to transmit to the client device 30.

  Next, the operation of the server / client (Thin Client) system using the HTTP tunnel server 10 having the above-described configuration will be described.

  FIG. 2 is a flowchart showing the client processing in the client device 30 and the tunnel server processing in the HTTP tunnel server device 10 in the server client system.

  FIG. 3 is a diagram showing a part of an operation sequence in the server / client system using the HTTP tunnel server device 10.

  When the input unit 34 is operated by the user in the client device 30 in a state where the connection between the client device 30 and the server device 20 is established (step A1 (Yes)), the key or mouse associated with the user operation is used. Input event data is stored in the transmission buffer 33a (step A2).

  When it is determined that the input event data (transmission data) is stored in the transmission buffer 33a (step A3 (Yes)), the input event data [Data (Client)] is transferred to the HTTP tunnel via the communication control unit 36. The server apparatus 10 is transmitted to the server apparatus 20 at the preceding stage (step A4), and the data reception standby state from the server apparatus 10 is entered (step A6).

  First, the HTTP tunnel server device 10 enters a data reception standby state from the server device 20 or the client device 30 (step B1), and determines whether there is data reception from the server device 20 (step B2).

  If it is determined that there is no data reception from the server device 20 (step B2 (No)), it is determined whether there is data reception from the client device 30 (step B4).

  If it is determined that the input event data [Data (Client)] transmitted from the client device 30 in response to the user operation is received, the input event data is stored in the reception buffer 13a (step B4 ( Yes)).

  Then, it is determined whether or not reception data from the server device 20 is stored in the transmission buffer 13b (step B5).

  Here, if it is determined that the reception data from the server device 20 is not stored in the transmission buffer 13b (step B5 (No)), the input event data (from the client device 30) ( It is determined whether or not (real data) [Data (Client)] is stored (step B6).

  When it is determined that input event data (actual data) from the client device 30 is stored in the reception buffer 13a (step B6 (Yes)), the input event data [Data (Client)] Is transmitted (transferred) to the client device 20 (step B7).

  Then, a maximum wait time (initial value: for example, 1000 ms) for waiting for reception of display screen data (response data) generated by the server device 20 according to the input event data from the client device 30 is set. It is determined whether or not response data from the server device 20 is received every 1/10 hour of the maximum wait time (steps B8 to B10 (No) → B8).

  In the data reception waiting state [Wait] from the server device 20 in which the maximum wait time is set, the display screen data generated by the application program 21 of the server device 20 in accordance with the input event data from the client device 30 [ Data (Server)] is received from the server device 20 and stored in the transmission buffer 13b (step B9 (Yes)), the input event data is transmitted to the server device 20 in step B7, and the current data is stored. The actual wait time [αn] (actual response time) until the display screen data is received is acquired and stored in the actual wait time memory 13c (step B11).

  Then, the current actual wait time [αn] stored in the actual wait time memory 13c is the total accumulated wait time [Σαi: i = 1 to n] stored in the total accumulated wait time memory 13d. It is determined whether or not the average wait time divided by the number of times n [Σαi / n: i = 1 to n] or longer (step B12).

  Here, when it is determined that the actual wait time [αn] of this time is less than the average wait time [Σαi / n: i = 1 to n] (first time is the maximum wait time 1000 ms) (step B12 (No)) ), The first maximum wait time [(Σαi / n) × β1: i = 1 to n] is calculated for the next standby in step B8 and stored in the first maximum wait time memory 13g (step B13). .

  Further, in a data reception standby state from the server device 20 for the second and subsequent times when the maximum wait time is set (steps B8 to B10 (No) → B8), a display screen corresponding to the input event data from the server device 20 When it is determined that the actual wait time [αn] is equal to or longer than the average wait time [Σαi / n: i = 1 to n] when data is received (step B9 (Yes)) (step B9) B12 (Yes)), the second maximum wait time [(Σαi / 10) × β2: i = n−9 to n] is calculated and stored in the second maximum wait time memory 13h for the next standby in step B8. (Step B14).

  Then, the display screen data [Data (Server)] received from the server device 20 and stored in the transmission buffer 13b is transmitted (transferred) to the client device 30 as server response data (step B15).

  When the client screen 30 receives the display screen data [Data (Server)] transferred by the HTTP tunnel server 10 and stores it in the reception buffer 33b (steps A6 and A7 (Yes)), the screen The data is drawn in the frame buffer 33c and displayed on the display unit 35 (step A8).

  Thereby, the display screen data [Data (Server)] generated according to the application program 21 executed by the server device 20 in accordance with the input event data [Data (Client)] accompanying the user operation of the client device 30 is displayed. The client device 30 receives and displays it.

  On the other hand, in the data reception standby state from the server device 20 in which the maximum wait time is set in the HTTP tunnel server device 10 (steps B8 to B10 (No) → B8), display screen data from the server device 20 is received. If it is determined that the maximum wait time has elapsed (step B10 (Yes)) without being performed (step B9 (No)), empty response data is transmitted to the client device 20 (step B16).

  When the client device 30 receives the empty response data transmitted by the HTTP tunnel server device 10 (steps A6 and A7 (No)), it waits for transmission of input event data corresponding to the next user operation (step S6). A1) or data request transmission processing as periodic polling is entered (step A1 (No) → A3 (No) → A5).

  Therefore, in this case, the HTTP tunnel server device 10 sets the maximum wait time without transmitting response data to the client device 30 immediately after receiving the input event data [Data (Client)] from the client device 30. Set and wait [Wait], and transfer the display screen data [Data (Server)] received from the server device 20 during the standby to the client device 30 as response data. Therefore, the client device 30 can receive and display display screen data from the server device 20 in one session without having to transmit a data request again after transmitting the input event data.

  In addition, the maximum wait time for waiting for reception of the display screen data (response data) generated by the server device 20 is the first maximum wait time [(Σαi / n ) × β1: i = 1 to n] so that the average wait time of the total accumulated wait time [Σαi: i = 1 to n] effective when the delay variation of the response from the server device 20 is small is converged. Set to In the case of the second maximum wait time [(Σαi / 10) × β2: i = n−9 to n], the most recent accumulated number of wait times that are effective when the delay variation of the response from the server device 20 is large. It is set to converge to the average wait time of [Σαi: i = n-9 to n]. Therefore, the useless waiting time generated as a difference between the waiting time (maximum wait time) set in accordance with the waiting process and the response time from the actual server device 20 (actual wait time [αn]) is set as the response time. Regardless of fluctuations, it can be reduced as much as possible.

  The HTTP tunnel server device 10 immediately transmits empty response data to the client device 30 when display screen data (response data) is not received from the server device 20 during standby in which the maximum wait time is set. To do. Therefore, the client device 30 can quickly shift to the input event data transmission standby state corresponding to the next user operation without unnecessarily prolonging the data reception standby state.

  On the other hand, the display screen data (response data) from the server device 20 is not received during standby in which the maximum wait time is set, and empty response data is transmitted to the client device 30 and then displayed from the server device 20. When the display screen data is received, or when the display screen data automatically updated according to the application program 21 being executed in the server device 20 is received, the received display screen data is stored in the transmission buffer 13b. (Steps B1 to B3).

  When a data request transmitted as regular polling from the client device 30 (step A5) is received by the HTTP tunnel server device 10 (step B4 (Yes)), display screen data (actual data) is stored in the transmission buffer 13b. (Data) is stored (step B5 (Yes)), the display screen data is immediately transmitted to the client device 30 as response data without shifting to the standby processing (steps B8 to B10). (Step B17).

  The display screen data received by the client device 30 is drawn in the frame buffer 33c and displayed on the display unit 35 (steps A6 to A8).

  Therefore, also in this case, the client device 30 can quickly receive and display display screen data from the server device 20 in one session.

  Further, when a data request transmitted as regular polling from the client device 30 (step A5) is received by the HTTP tunnel server device 10 (step B4 (Yes)), display screen data is stored in the transmission buffer 13b. If (actual data) is not stored (step B5 (No)), empty response data is immediately transmitted to the client device 30 (step B6 (No) → B18 (No) → B19).

  Therefore, also in this case, the client device 30 can quickly shift to the input event data transmission standby state corresponding to the next user operation.

  Therefore, according to the server-client (Thin Client) system using the HTTP tunnel server device 10 having the above-described configuration, the response performance between the client and the server can be greatly improved.

  The server client system that uses the HTTP tunnel server device 10 having the above-described configuration is a so-called server-based computing system that uses a wireless communication thin client terminal that has a large transmission delay and response performance that tends to deteriorate. This is particularly effective in the (SBC system), but is also effective in improving the response performance between the client and the server even in a server-client system using a normal mobile terminal that can execute various applications alone. Of course.

  The processing method by the HTTP tunnel server device 10 described in the above embodiment, that is, the tunnel server processing method shown in the flowchart of FIG. 2, is a memory card (ROM card, RAM card, etc.) as a program that can be executed by a computer. ), A magnetic disk (floppy disk, hard disk, etc.), an optical disk (CD-ROM, DVD, etc.), an external storage medium 17 such as a semiconductor memory, and the like can be distributed. Then, the computer (CPU 11) of the HTTP tunnel server device 10 reads the program stored in the external storage medium 17 into the storage device (13), and the operation is controlled by the read program. The described HTTP tunnel function can be realized and the same processing can be executed by the above-described method.

  Further, the program data for realizing the method can be transmitted on the communication network (N) as a program code form, and the computer data (program server) connected to the communication network (N) can transmit the data. The above-described HTTP tunnel function can be realized by fetching the program data and storing it in the storage device (13).

  Note that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention in the implementation stage. Further, the embodiments include inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements. For example, even if some constituent requirements are deleted from all the constituent requirements shown in the embodiment or some constituent requirements are combined in different forms, the problems described in the column of the problem to be solved by the invention are not solved. When the effects described in the column “Effects of the Invention” can be obtained, a configuration in which these constituent requirements are deleted or combined can be extracted as an invention.

10 ... HTTP tunnel server device 11 ... CPU
DESCRIPTION OF SYMBOLS 12 ... Bus 13 ... Memory | storage part 13a ... Reception buffer 13b ... Transmission buffer 13c ... Actual Wait time [(alpha) n] memory 13d ... Total accumulation Wait time [(SIGMA) i: i = 1-n] Memory 13e ... Predetermined accumulation Wait time [(Sigma) [alpha] i: i = n-9 to n] memory 13f ... margin coefficient [β] memory 13g ... first maximum wait time [(Σαi / n) × β: i = 1 to n] memory 13h ... second maximum wait time [(Σαi / 10) × β: i = n−9 to n] memory 16 ... communication control unit 17 ... external storage medium 18 ... storage medium reading unit 20 ... server device 21 ... application program 30 ... client device (Thin Client)
33c: Frame buffer 34: Input unit 35: Display unit N: Communication network

Claims (6)

Response time acquisition means for acquiring the response time of another server device;
Based on the response time of the other server apparatus acquired by the response time acquisition means, a standby time setting means for setting a standby time for waiting for a response from the other server apparatus,
When the received data is actual data when the data is received from the client device, the other data is transmitted to the other server device, and then the other data is received within the waiting time set by the waiting time setting means. Response reception determination means for determining whether server response data is received from the server device;
A server actual data storage unit that stores the received actual data when the actual data is received from the other server device outside the waiting time by the response reception determination unit;
When it is determined by the response reception determination means that server response data has been received from the other server device within the standby time, the response data transmission means within standby for transmitting the server response data to the client device;
If the response reception determining means determines that server response data is not received from the other server apparatus within the waiting time, the response data transmitting means after waiting for transmitting response data not including actual data to the client apparatus When,
In the case where the data received from the client device is data request information that does not include actual data, if the actual data received from the other server device is stored by the server actual data storage means, the stored data is stored. If the actual data received from the other server device is not stored by the server actual data storage means, the response data not including the actual data is immediately transmitted. Request response data transmitting means for transmitting to the client device;
A server device comprising: The response time acquisition means includes
When it is determined that the server response data is received from the other server device within the standby time set by the standby time setting unit by the response reception determination unit, the actual server response data when the server response data is received Having an actual response time acquisition means for acquiring the response time;
The waiting time setting means sets a waiting time for waiting for a response from the other server device based on an average response time of actual response times of the other server devices acquired by the actual response time acquiring means.
The server apparatus according to claim 1. The waiting time setting means is based on the average response time of the actual response time of the other server apparatus acquired by the actual response time acquisition means and the margin according to the fluctuation of the response time, from the other server apparatus. Set the waiting time to wait for a response,
The server device according to claim 2. A server device that responds to a request from a client device,
First determination means for determining whether a request from the client device is a request type including an input event;
If it is determined by the first determination means that the request type includes the input event, the request is transmitted to another server device , and the request is answered outside the waiting time for waiting for a response after the request. when it receives the generated actual data generated corresponding from the other server apparatus, a storage control unit for storing control received generated real data in the storage means,
Second determination means for determining whether or not the generated actual data is stored in the storage means when there is a request from the client device;
Wherein when said generated actual data is judged as being stored in the second discriminating means, transmits to the client device the generated real data as response data, whereas, the generated actual data in said second discrimination means is determined not to be stored, said when it is determined that the input is an event a does not include the request type is a first discriminating means, transmission request response transmits the response data indicating that the data generated is not to the client device A means of communication,
A server device comprising: A program for controlling a computer of a server device,
Response time acquisition means for acquiring response times of other server devices;
A standby time setting means for setting a standby time for waiting for a response from the other server apparatus based on the response time of the other server apparatus acquired by the response time acquisition means;
When the received data is actual data when the data is received from the client device, the other data is transmitted to the other server device, and then the other data is received within the waiting time set by the waiting time setting means. Response reception determination means for determining whether or not server response data is received from the server device;
Server actual data storage means for storing the received actual data when the actual data is received from the other server device outside the waiting time by the response reception determining means;
If the response reception determination means determines that server response data has been received from the other server device within the standby time, the response data transmission means within standby for transmitting the server response data to the client device;
If the response reception determining means determines that server response data is not received from the other server apparatus within the waiting time, the response data transmitting means after waiting for transmitting response data not including actual data to the client apparatus ,
In the case where the data received from the client device is data request information that does not include actual data, if the actual data received from the other server device is stored by the server actual data storage means, the stored data is stored. If the actual data received from the other server device is not stored by the server actual data storage means, the response data not including the actual data is immediately transmitted. Request response data transmission means to be transmitted to the client device;
Control program to function as. A program for controlling a computer of a server device that responds to a request from a client device ,
A waiting time setting means for setting a waiting time for waiting for a response from another server device;
First determination means for determining whether a request from the client device is a request type including an input event;
When it is determined by the first determination means that the request type includes the input event, the request is transmitted to another server device, and after the request, the waiting time outside the waiting time set by the waiting time setting means the when the generating actual data generated in response to a request has been received from the other server apparatus, storage control means for storing control received generated real data in the storage means,
Second determination means for determining whether or not the generated actual data is stored in the storage means when there is a request from the client device;
Wherein when said generated actual data is judged as being stored in the second discriminating means, transmits to the client device the generated real data as response data, whereas, the generated actual data in said second discrimination means is determined not to be stored, said when it is determined that the input is an event a does not include the request type is a first discriminating means, transmission request response transmits the response data indicating that the data generated is not to the client device Means of communication,
Control program to function as.

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