JP2005234755A - Server affair continuation system, server affair continuation method, monitoring server and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To realize the continuation of a server affair in simple configurations without making a server side make any action when any overload or abnormality occurs in the server. <P>SOLUTION: A monitoring server 40 monitors and judges the state of an acceptance affair server 20 which processes a processing request from a customer terminal 10. The monitoring server 40 receives the processing request from the customer terminal 10, and stores it into a storage part. The monitoring server 40 transmits the processing request to the acceptance affair server 20 when it is judged that the acceptance affair server 20 is normal, and entrusts a portion of the processing request to a common server 30 when it is judged that there is a sign of an overload or failure, and entrusts the processing request to the common server 30 when it is judged that a failure occurs. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a server business continuation system, a server business continuation method, a monitoring server, and a program, and more particularly to a server business continuation system, a server business continuation method, a monitoring server, and a program.

  Usually, in Internet shopping, a customer terminal accesses a site of a certain store and places an order for a product. However, a large load is imposed on the server that performs reception processing at the dealer side due to the number of accesses that is greater than expected, and the reception processing may not be performed smoothly, and the customer may be forced to re-access. Or, when a sign of a failure occurs, a phenomenon such as the server going down occurs, and the customer has to access again after a while. The fact is that customers are still not comfortable shopping online. In such mission-critical systems, business continuity is a key to customer satisfaction.

  Japanese Patent Application Laid-Open No. 2004-151867 discloses a method for performing backup in the event of a server failure. According to Patent Document 1, the control information and introduction data of each branch office server are collected on the center side server when there is no failure, and a dedicated business agency server that replaces the business of the branch office server is separately provided on the communication network. Place it in. Furthermore, by switching only the control information to the business substitution server when the sales office server fails, the switching time until the backup system is started is shortened.

JP 2000-82040 A (page 4-7, FIGS. 1 and 2)

  As described above, the conventional server system may inconvenience the customer due to overload or failure. This problem is not limited to Internet shopping, but also applies to servers such as hospital consultation reception processing, video distribution, music distribution, and Internet banking.

  The method disclosed in Patent Document 1 also has a problem that it is necessary to take an action on the server side when an abnormality occurs in the server.

  An object of the present invention is to provide a server business continuation system and a server business continuation method that realizes continuation of server business with no simple action from the server side when an overload or abnormality occurs in the server. It is to provide a monitoring server and a program.

The server business continuation system of the present invention comprises a customer terminal, a reception business server that processes a processing request from the customer terminal, a joint server, and a monitoring server, which are connected to each other via a network.
The monitoring server includes a status monitoring unit that determines a status of the reception business server, a storage unit that receives and stores the processing request from the customer terminal, and a status of the reception business server determined by the status monitoring unit. Correspondingly, having an access distribution unit that reads and distributes the processing request from the storage unit,
The access distribution unit transmits the processing request to the reception business server when the state monitoring unit determines that the reception business server is normal, and at least a part of the processing request when the status monitoring unit determines that the reception business server is not normal Is commissioned to the joint server.

The server business continuation system of the present invention comprises a customer terminal, a reception business server that processes a processing request from the customer terminal, a joint server, and a monitoring server, which are connected to each other via a network.
The monitoring server includes a status monitoring unit that determines a status of the reception business server, a storage unit that receives and stores the processing request from the customer terminal, and a status of the reception business server determined by the status monitoring unit. Correspondingly, having an access distribution unit that reads and distributes the processing request from the storage unit,
The access distribution unit transmits the processing request to the reception business server when the state monitoring unit determines that the reception business server is normal, and determines that there is an overload or a failure sign May entrust at least a part of the processing request to the joint server, and when it is determined that a failure has occurred, the processing request may be commissioned to the joint server.

  In the server business continuity system of the present invention, the status monitoring unit determines whether the reception business server is overloaded when any of the CPU, memory, and network of the reception business server exceeds a certain threshold value. It may be characterized by determining that there is a sign of failure.

In the server business continuation system of the present invention, the storage unit receives and stores the processing result of the reception business server in response to the processing request from the reception business server,
If the processing result corresponding to the processing request is not stored even after a predetermined time has elapsed after the processing request is stored, the state monitoring unit determines that the reception service server is overloaded or has a sign of a failure This may be a feature.

  In the server business continuation system of the present invention, when the state monitoring unit determines that a failure has occurred in the reception business server, the access distribution unit refers to the storage unit and transmits to the reception business server The processing request in which the corresponding processing result is not stored among the processing requests is extracted, and the extracted processing request may be entrusted to the joint server.

  The server business continuation method of the present invention includes a step of determining a state of a reception business server that processes a processing request from a customer terminal, a step of receiving the processing request from the customer terminal and storing it in a storage unit, and the reception When it is determined that the business server is normal, the step of reading the processing request from the storage unit and transmitting it to the reception business server; and when it is determined that the business server is not normal, at least a part of the processing request is read from the storage unit. A step of reading and entrusting to the joint server.

  The server business continuation method of the present invention includes a step of determining a state of a reception business server that processes a processing request from a customer terminal, a step of receiving the processing request from the customer terminal and storing it in a storage unit, and the reception When it is determined that the business server is normal, the processing request is read from the storage unit and transmitted to the receiving business server; when it is determined that there is an overload or a failure sign, the processing request A step of reading at least a part from the storage unit and entrusting to the joint server; and a step of reading the processing request from the storage unit and entrusting to the joint server when it is determined that a failure has occurred. It may be characterized by that.

  In the server business continuation method of the present invention, if any of the CPU, memory, and network of the reception business server exceeds a certain threshold value, the reception business server is overloaded or there is an indication of a failure. It may be characterized by comprising a step of determining that there is.

  The server business continuation method of the present invention includes a step of receiving the processing result of the reception business server in response to the processing request from the reception business server and storing it in the storage unit, and the processing result corresponding to the processing request is the processing A step of determining that the received business server is overloaded or has a sign of failure when the request is not stored even after a predetermined time has elapsed.

  In the server business continuation method of the present invention, when it is determined that a failure has occurred in the reception business server, the processing result corresponding to the processing request transmitted to the reception business server with reference to the storage unit is obtained. The method may include a step of extracting the processing request that is not stored and a step of entrusting the extracted processing request to the joint server.

The monitoring server of the present invention is a monitoring server connected to a customer terminal, a reception service server that processes a processing request from the customer terminal, and a joint server via a network,
A status monitoring unit that determines the status of the reception business server, a storage unit that receives and stores the processing request from the customer terminal, and the processing corresponding to the status of the reception business server determined by the status monitoring unit An access distribution unit that reads and distributes requests from the storage unit;
The access distribution unit transmits the processing request to the reception business server when the state monitoring unit determines that the reception business server is normal, and at least a part of the processing request when the status monitoring unit determines that the reception business server is not normal Is commissioned to the joint server.

The monitoring server of the present invention is a monitoring server connected to a customer terminal, a reception service server that processes a processing request from the customer terminal, and a joint server via a network,
A status monitoring unit that determines the status of the reception business server, a storage unit that receives and stores the processing request from the customer terminal, and the processing corresponding to the status of the reception business server determined by the status monitoring unit An access distribution unit that reads and distributes requests from the storage unit;
The access distribution unit transmits the processing request to the reception business server when the state monitoring unit determines that the reception business server is normal, and determines that there is an overload or a failure sign May entrust at least a part of the processing request to the joint server, and when it is determined that a failure has occurred, the processing request may be commissioned to the joint server.

  In the monitoring server according to the present invention, the status monitoring unit may determine whether the reception business server is overloaded or faulty when any of the CPU, memory, and network of the reception business server exceeds a certain threshold. It may be characterized by determining that there is a sign.

In the monitoring server of the present invention, the storage unit receives and stores the processing result of the reception service server for the processing request from the reception service server,
If the processing result corresponding to the processing request is not stored even after a predetermined time has elapsed after the processing request is stored, the state monitoring unit determines that the reception service server is overloaded or has a sign of a failure This may be a feature.

  In the monitoring server of the present invention, when the state monitoring unit determines that a failure has occurred in the reception service server, the access distribution unit refers to the storage unit and transmits the process to the reception service server The processing request in which the corresponding processing result is not stored among the requests may be extracted, and the extracted processing request may be outsourced to the joint server.

  The program of the present invention includes: a process for determining a state of a reception service server that processes a process request from a customer terminal; a process for receiving the process request from the customer terminal and storing the process request in a storage unit; When it is determined that the processing request is normal, the processing request is read from the storage unit and transmitted to the reception service server. When it is determined that the processing request is not normal, at least a part of the processing request is read from the storage unit. Causes the computer to execute the process of entrusting to the joint server.

  The program of the present invention includes: a process for determining a state of a reception service server that processes a process request from a customer terminal; a process for receiving the process request from the customer terminal and storing the process request in a storage unit; When it is determined that the processing request is normal, the processing request is read from the storage unit and transmitted to the reception service server, and when it is determined that there is an overload or a sign of failure, at least a part of the processing request From the storage unit and entrusting to the joint server, and if it is determined that a failure has occurred, the computer executes the process of reading the processing request from the storage unit and entrusting to the joint server You may do it. .

  The program of the present invention performs a process of determining that the reception business server is overloaded or has a failure sign when any of the CPU, memory, and network of the reception business server exceeds a certain threshold value. You may make it make a computer perform.

  The program of the present invention includes a process of receiving a processing result of the reception service server in response to the processing request from the reception service server and storing it in the storage unit, and a process result corresponding to the processing request is stored after the processing request is stored. If the information is not stored even after a certain period of time has elapsed, the computer may execute a process of determining that the reception service server is overloaded or has a failure sign.

  The program of the present invention stores the corresponding processing result among the processing requests transmitted to the reception service server with reference to the storage unit when it is determined that a failure has occurred in the reception service server. You may make it make a computer perform the process which extracts the said process request which does not exist, and the process which entrusts the extracted said process request to the said joint server.

  According to the present invention, the following effects can be expected.

  Even when the reception business server is overloaded or troubled, it is possible to continue the business without taking action from the store site that manages the reception business server. Even if access is not made again from the customer terminal, the access path is automatically switched and the processing request once interrupted is resumed, so that the customer can continue Internet shopping without waiting.

  The best mode for carrying out the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing the configuration of the embodiment of the present invention. A customer terminal 10, a reception service server 20, a joint server 30, and a monitoring server 40 are connected via a network. The network will be described as being the Internet 100. As a general form, there are a plurality of customer terminals 10, reception service servers 20, and joint servers 30, respectively.

  The customer terminal 10 is an information processing apparatus such as a personal computer or a mobile phone. Although not shown, it has an input unit for inputting data, a display unit for displaying data on the screen, and a storage unit for temporarily storing data. The customer 1 uses the customer terminal 10 to access the reception business server 20 of each dealer site 2 and transmits terminal information, customer information, desired product information, etc. to the reception business server 20 when ordering goods. And request processing.

  The reception business server 20 is an information processing apparatus used by a business operator who operates the dealer site 2 on the Internet 100, and performs a process of receiving an order for an item from the customer terminal 10. Although not shown, the reception service server 20 includes an input unit for inputting data, a display unit for displaying data on a screen, and a storage unit for temporarily storing data as needed.

  The joint server 30 accepts a part or all of the business of accepting orders for goods of the reception business server 20 when the load on the reception business server 20 becomes high or a failure occurs in the reception business server 20. The joint server 30 includes an order reception system of each dealer site 2, and even if an abnormality occurs in the reception business server 20 in any dealer site 2, it is possible to entrust the business to the joint server 30.

  The monitoring server 40 monitors the state of the reception service server 20 in each store site 2. The state is a load, a sign of failure, and the like. FIG. 2 is a block diagram showing the configuration of the monitoring server 40. The monitoring server 40 includes a state monitoring unit 41, a storage unit 42, and an access distribution unit 43.

  The state monitoring unit 41 constantly monitors the performance of the CPU (central processing unit), memory, network, etc. of the reception business server 20 and determines the state of the reception business server 20.

  The storage unit 42 stores an access log database 45. FIG. 3 is a diagram illustrating an example of the access log database 45. The access log database 45 includes a processing request database 46 and a processing result database 47. The processing request database 46 includes order information transmitted from the customer terminal 10 when the customer 1 orders an item. The processing request database 46 includes a flag unit 461, customer information 462, terminal information 463, requested processing 464, and processing request destination 465. Customer information 462 is, for example, the name, address, and e-mail address of customer 1. The terminal information is, for example, an IP (internet protocol) address of the customer terminal 10. The requested process 464 is, for example, the product code and the number of products ordered by the customer 1. The processing result database 47 records information on the processing result of the order reception business processed by the reception business server 20. The processing result database 47 includes customer information 471, terminal information 472, and processed requests 473.

  The access distribution unit 43 distributes the order reception operation requested from the customer terminal 10 to the reception operation server 20 or the joint server 30 based on the result of the state determination of the reception operation server 20 output from the state monitoring unit 41. The access distribution unit 43 compares the “requested process” in the process request database 46 in the access log database 45 with the “processed request” in the process result database 47, and completes the “request request” process that has completed the order reception process. Flag "processed".

  Next, the operation will be described. FIG. 4 is a flowchart showing the normal operation.

  The state monitoring unit 41 of the monitoring server 40 is connected to the Internet 100 and constantly monitors the performance of the CPU, memory, network, and the like of the reception work server 20 to be monitored by the own server (step A1).

  The customer 1 accesses the reception business server 20 of the store site 2 from the customer terminal 10 and orders the desired item via the Internet 100 (step A2). At this time, the customer terminal 10 does not directly access the reception service server 20, but first the monitoring server 40 is the window. The monitoring server 40 once writes terminal information, customer information, information on a product desired to be purchased, etc. sent from the customer terminal 10 into the processing request database 46 of the access log database 45 (step A3), and then processing. An access request or a processing request is issued to the receiving business server 20 that is the request target.

  The state monitoring unit 41 of the monitoring server 40 determines the state of the reception work server 20 (step A4), and determines and holds the state as follows based on the result. FIG. 5 is a flowchart illustrating an operation in which the state monitoring unit 41 determines the state of the reception work server 20.

  The state monitoring unit 41 determines whether or not the reception work server 20 has failed (step B1). In the case of Yes in step B1, the state monitoring unit 41 determines and holds the state of the reception business server 20 as stat3 (the reception business server 20 has failed).

  In the case of No in Step B1, the state monitoring unit 41 determines whether or not the reception work server 20 shows an abnormality that exceeds a certain threshold value such as a CPU, memory, network, or the like (Step B2). In the case of Yes in step B2, the state monitoring unit 41 determines and holds the state of the reception work server 20 as stat2 (load overload because there is an overload or there is a sign of failure).

  In the case of No in step B2, the state monitoring unit 41 determines whether or not the flag has reached a certain time (step B3). In the case of Yes in step B3, the state monitoring unit 41 determines and holds the state of the reception service server 20 as stat2 (load overload because there is an overload or there is a sign of failure).

  In the case of No in step B3, the state monitoring unit 41 determines and holds the state of the reception business server 20 as stat3 (the state of the reception business server 20 is normal).

  Even if the status is once held in stat 2 and stat 3, if the performance of the reception business server 20 is reduced or the performance is improved by performing maintenance of the reception business server 20, the state monitoring unit 41 returns to stat 1 again. return.

  If it is determined that the state of the processing request destination reception business server 20 is stat1, the access distribution unit 43 sends an access request or processing request from the customer terminal 10 to the processing request destination reception business server 20 (step A5). . The reception service server 20 performs the processing.

  When the job processing is completed (step A6), the reception service server 20 returns a processing result to the monitoring server 40 (step A7).

  If there is an abnormality in the status of the reception service server 20 due to an increase in access from the customer terminal 10 or the like, the status monitoring unit 41 determines that the status is stat2 or stat3. In the case of stat2 or stat3, the access distribution unit 43 changes the path of the access request or processing request from the customer terminal 10 from the reception service server 20 to the joint server 30 on the Internet 100 (step A8). In the case of stat 2, the access distribution unit 43 may distribute some of the processing requests instead of all of the processing requests to the joint server 30 to achieve load distribution. The joint server 30 processes the distributed processing request.

  When the job processing is completed (step A9), the joint server 30 returns a processing result to the monitoring server 40 (step A10).

  The monitoring server 40 writes the processing result transmitted from the reception service server 20 or the joint server 30 in the processing result database 47 of the access log database 45 (step A11).

  The access distribution unit 43 compares the “processed request” written in the process result database 47 with the corresponding “requested process” in the process request database 46. When the completion of the accepted processing request is confirmed, the access distribution unit 43 sets a flag in the processing request flag portion (461 in FIG. 3) (step A12). The flag portion (461 in FIG. 3) indicates “1: processing complete” and “0: processing incomplete”.

  Thereafter, the monitoring server 40 returns the processing result to the customer terminal 10 (step A13).

  FIG. 6 is a flowchart showing an operation when the monitoring server 40 detects a failure after the monitoring server 40 issues a processing request for an order reception job to the reception job server 20. Steps C1 to C5 are the same as steps A1 to A5 in FIG.

  When a failure occurs in the reception service server 20 (step C6), the state monitoring unit 41 determines that there is a failure (step C7).

  Based on this determination, the access distribution unit 43 changes the processing request path from the reception service server 20 to an arbitrary joint server 30. At the same time, the access distribution unit 43 searches the access log database 45 and reads out a processing request for which no flag is set among processing requests corresponding to the reception work server 20 that has failed. The read processing request is issued to the joint server 30 to be changed (step C8).

  The subsequent steps C9 to C13 are the same as steps A9 to A13 in FIG.

  Since there is an access log on the monitoring server 40 side even when a failure occurs in the reception service server 20, the processing request can be continued without stopping. Thereby, the process is continuously performed without the customer 1 recognizing the failure of the reception service server 20.

  The operations of the state monitoring unit 41 and the access distribution unit 43 according to the embodiment of the present invention can be performed by computer program processing. That is, the program recorded on the recording medium is read by the monitoring server 40, or the program is read by the monitoring server 40 from the network, and the operation described in the embodiment is executed.

  Although the example of Internet shopping has been described in the above-described embodiment, the present invention is not limited to this. The present invention can be applied to reception work such as hospital medical examination reception processing, video distribution, music distribution, and internet banking.

It is a block diagram which shows the structure of embodiment of this invention. It is a block diagram which shows the structure of a monitoring server. Access log database It is a flowchart which shows the operation | movement at the normal time. It is a flowchart which shows the operation | movement which a state monitoring part determines the state of a reception business server. It is a flowchart which shows operation | movement when a failure is detected after a process request.

Explanation of symbols

2 dealer site 10 customer terminal 20 reception service server 30 joint server 40 monitoring server 41 status monitoring unit 42 storage unit 43 access distribution unit 45 access log database 46 processing request database 47 processing result database

Claims (20)

A customer terminal connected to each other via a network, a reception service server that processes a processing request from the customer terminal, a joint server, and a monitoring server;
The monitoring server includes a status monitoring unit that determines a status of the reception business server, a storage unit that receives and stores the processing request from the customer terminal, and a status of the reception business server determined by the status monitoring unit. Correspondingly, having an access distribution unit that reads and distributes the processing request from the storage unit,
The access distribution unit transmits the processing request to the reception business server when the state monitoring unit determines that the reception business server is normal, and at least a part of the processing request when the status monitoring unit determines that the reception business server is not normal A server business continuation system, wherein the server is entrusted to the joint server. A customer terminal connected to each other via a network, a reception service server that processes a processing request from the customer terminal, a joint server, and a monitoring server;
The monitoring server includes a status monitoring unit that determines a status of the reception business server, a storage unit that receives and stores the processing request from the customer terminal, and a status of the reception business server determined by the status monitoring unit. Correspondingly, having an access distribution unit that reads and distributes the processing request from the storage unit,
The access distribution unit transmits the processing request to the reception business server when the state monitoring unit determines that the reception business server is normal, and determines that there is an overload or a failure sign Entrusts at least a part of the processing request to the joint server, and when it is determined that a failure has occurred, the processing request is commissioned to the joint server. The state monitoring unit determines that the reception business server is overloaded or has a failure sign when any of the CPU, memory, and network of the reception business server exceeds a certain threshold value. The server business continuation system according to claim 2, wherein: The storage unit receives and stores the processing result of the reception service server for the processing request from the reception service server,
If the processing result corresponding to the processing request is not stored even after a predetermined time has elapsed after the processing request is stored, the state monitoring unit determines that the reception service server is overloaded or has a sign of a failure The server business continuation system according to claim 2 or 3, When the status monitoring unit determines that a failure has occurred in the reception service server, the access distribution unit refers to the storage unit and refers to the processing corresponding to the processing request transmitted to the reception service server 5. The server business continuation system according to claim 2, wherein the processing request in which a result is not stored is extracted, and the extracted processing request is entrusted to the joint server. Determining a state of a reception business server that processes a processing request from a customer terminal, receiving the processing request from the customer terminal and storing it in a storage unit, and determining that the reception business server is normal A step of reading the processing request from the storage unit and transmitting the processing request to the reception service server, and a step of reading at least a part of the processing request from the storage unit and delegating to the joint server when it is determined that the processing request is not normal. A server business continuation method characterized by comprising: Determining a state of a reception business server that processes a processing request from a customer terminal, receiving the processing request from the customer terminal and storing it in a storage unit, and determining that the reception business server is normal A step of reading the processing request from the storage unit and transmitting it to the reception service server, and reading out at least a part of the processing request from the storage unit when it is determined that there is an overload or a sign of failure. Server operation continuation comprising the steps of: consigning to the joint server; and, if it is determined that a failure has occurred, reading the processing request from the storage unit and consigning to the joint server Method. When any of the CPU, memory, and network of the reception service server exceeds a certain threshold value, there is a step of determining that the reception service server is overloaded or has a sign of a failure. 8. The server business continuation method according to claim 7. Receiving the processing result of the reception service server in response to the processing request from the reception service server and storing it in the storage unit; and even if the processing result corresponding to the processing request has elapsed for a certain time after the processing request is stored. 9. The server business continuation method according to claim 7 or 8, further comprising a step of determining that the reception business server is overloaded or has a failure sign when it is not stored. Extracting the processing request in which the corresponding processing result is not stored among the processing requests transmitted to the reception business server with reference to the storage unit when it is determined that a failure has occurred in the reception business server The server business continuation method according to claim 7, further comprising: a step of entrusting the extracted processing request to the joint server. A monitoring server connected via a network to a customer terminal, a reception service server that processes a processing request from the customer terminal, and a joint server,
A status monitoring unit that determines the status of the reception business server, a storage unit that receives and stores the processing request from the customer terminal, and the processing corresponding to the status of the reception business server determined by the status monitoring unit An access distribution unit that reads and distributes requests from the storage unit;
The access distribution unit transmits the processing request to the reception business server when the state monitoring unit determines that the reception business server is normal, and at least a part of the processing request when the status monitoring unit determines that the reception business server is not normal A monitoring server characterized by entrusting to the joint server. A monitoring server connected via a network to a customer terminal, a reception service server that processes a processing request from the customer terminal, and a joint server,
A status monitoring unit that determines the status of the reception business server, a storage unit that receives and stores the processing request from the customer terminal, and the processing corresponding to the status of the reception business server determined by the status monitoring unit An access distribution unit that reads and distributes requests from the storage unit;
The access distribution unit transmits the processing request to the reception business server when the state monitoring unit determines that the reception business server is normal, and determines that there is an overload or a failure sign Entrusts at least a part of the processing request to the joint server, and when it is determined that a failure has occurred, the monitoring server entrusts the processing request to the joint server. The state monitoring unit determines that the reception business server is overloaded or has a failure sign when any of the CPU, memory, and network of the reception business server exceeds a certain threshold value. The monitoring server according to claim 12. The storage unit receives and stores the processing result of the reception service server for the processing request from the reception service server,
If the processing result corresponding to the processing request is not stored even after a predetermined time has elapsed after the processing request is stored, the state monitoring unit determines that the reception service server is overloaded or has a sign of a failure The monitoring server according to claim 12 or 13, characterized by the above. When the status monitoring unit determines that a failure has occurred in the reception business server, the access distribution unit refers to the storage unit and refers to the processing corresponding to the processing request transmitted to the reception business server The monitoring server according to claim 12, 13, or 14, wherein the processing request in which a result is not stored is extracted, and the extracted processing request is entrusted to the joint server. Processing for determining the status of the reception business server that processes a processing request from a customer terminal, processing for receiving the processing request from the customer terminal and storing it in a storage unit, and determining that the reception business server is normal In this case, the process request is read from the storage unit and transmitted to the reception service server, and when it is determined that the process request is not normal, at least a part of the process request is read from the storage unit and entrusted to the joint server. A program that causes a computer to execute. Processing for determining the status of the reception business server that processes a processing request from a customer terminal, processing for receiving the processing request from the customer terminal and storing it in a storage unit, and determining that the reception business server is normal If the processing request is read from the storage unit and transmitted to the reception service server, and if it is determined that there is an overload or a sign of a failure, at least a part of the processing request is read from the storage unit A program for causing a computer to execute the process of entrusting to the joint server and the process of reading the process request from the storage unit and entrusting to the joint server when it is determined that a failure has occurred. In order to cause the computer to execute processing for determining that the reception business server is overloaded or has a failure when any of the CPU, memory, and network of the reception business server exceeds a certain threshold value. The program according to claim 17. A process of receiving the processing result of the reception service server in response to the processing request from the reception service server and storing it in the storage unit; and even if the processing result corresponding to the processing request has elapsed for a certain time after the processing request is stored. 19. The program according to claim 17 or 18 for causing a computer to execute a process of determining that the reception service server is overloaded or has a failure sign when it is not stored. Extracting the processing request in which the corresponding processing result is not stored among the processing requests transmitted to the reception business server with reference to the storage unit when it is determined that a failure has occurred in the reception business server 20. The program according to claim 17, for causing a computer to execute a process to execute and a process to entrust the extracted processing request to the joint server.

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