JP2007094465A - Load balancing system, method and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a load balancing system capable of performing appropriate load balancing processing according to an access state from a terminal. <P>SOLUTION: This system comprises a first server group and a second server group each including a plurality of Web servers, and a load balancing means switching, in the first server group and the second server group, access requests from terminal devices between Web servers constituting the respective server groups. Each of the first server group and the second server group comprises a plurality of Web servers connected in parallel to the load balancing means, the Web servers having the same site structure storing a plurality of Web sites set to have different sub-domains respctively. The first server group and the second server group have the same site structure, and each access from terminal devices is selectively accepted based on the access state thereof by a Web server constituting the first server group and a Web server constituting the second server group. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a load distribution system, method, and program capable of performing appropriate load distribution processing of a computer network system.

  If many processes are concentrated from many clients on one Web server, the processing capacity of the Web server will be insufficient, and the response time to the client will be significantly increased. In order to cope with this, a method is used in which a plurality of Web servers are prepared and processing is performed by distributing the load. For example, when a request is transmitted to an IP address published on the Internet as an address of a Web server that distributes content, the load balancer selects from among a plurality of Web servers that are set to display content A A Web server to which a request is allocated is selected and determined, and the destination address of the request packet is converted into a local IP address of the server and passed.

  If the local address to be converted is changed, processing is assigned to a Web server different from the previous one. By doing so, requests made to the content A can be distributed and assigned to a plurality of Web servers. Similarly, a request for content B different from the content A is processed by a different load distribution device to a plurality of Web servers, and a request for content C is further distributed to a plurality of Web servers by another load distribution device. Distribute processing.

Further, a system disclosed in Patent Document 1 below is disclosed as a load distribution system that increases the operating rate of a Web server at times other than the peak time and easily increases the processing capacity of the system. The system includes a load balancer, a file server that holds content, a general-purpose Web server (CWS) that can access all content held by the file server, and a control server that controls the system. The CWS changes the content displayed by the CWS in response to an instruction from the control server, and the load balancer changes the processing distribution destination according to the change in the number of requests for each content.
JP 2002-259354 A

  In the conventional load distribution system of a computer network, the object is to distribute the processing originally performed by one server to a plurality of servers. Therefore, as in the conventional example, a first system composed of a load distribution device and a Web server for distributing content A, a second system composed of a load distribution device and a Web server for distributing content B, and content C A third system composed of a load distribution device and a Web server for distribution and a plurality of load distribution systems exist independently.

  In such a system, it is necessary to prepare the number of servers installed in each system in accordance with the peak time when access is most concentrated. Except for the peak time, the surplus server processing capacity is wasted. Thus, the operating efficiency of the server becomes worse. In addition, it is impossible to cope with the case where accesses exceeding the processing capacity estimated in advance are concentrated, and the response time of the content distribution processing for the client is greatly deteriorated. Furthermore, when adding a server to the system, it is necessary to prepare and add a server having a different configuration for each system system, which is troublesome.

  Moreover, in the load distribution system of Patent Document 1, it is necessary to install a control server in order to perform load distribution, and extra hardware is required. In addition, although there is a tendency of the usage situation such as connection time depending on the attribute of the user who is using the terminal device being accessed, the conventional load distribution system including the system of Patent Document 1 described above, When a request is transmitted, the request is merely allocated, and appropriate load balancing is not performed in consideration of what attribute the user accesses.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a load distribution system, method, and program capable of performing appropriate load distribution processing in accordance with an access state from a terminal device in a computer network system. To do.

  In order to achieve the above object, a load distribution system according to the present invention is a load distribution system in a computer network system that accepts access from a large number of terminal devices via the Internet, and includes a plurality of web servers. In each of the 1st server group, the 2nd server group comprised including a plurality of web servers, and the 1st server group and the 2nd server group from a terminal device between web servers which constitute each server group Load balancing means for switching the access requests, and the first server group loads a plurality of web servers of the same site configuration in which a plurality of websites set to have different subdomains are stored in parallel. The second server group is configured so as to be connected to the distribution means so that the subdomains are different from each other. A plurality of web servers having the same configuration in which a plurality of websites stored are connected in parallel to the load distribution means, and the first server group and the second server group have the same site configuration. Yes, with respect to the access from the terminal device, the web server constituting the first server group and the web server constituting the second server group are selectively accepted based on the access state of the access. It is a summary.

  In order to achieve the above object, a load distribution method of the present invention is a load distribution method in a computer network system that accepts access from a large number of terminal devices via the Internet, and includes a plurality of web servers. The first server group, the second server group configured to include a plurality of web servers, and the first server group and the second server group, a terminal between the web servers constituting each server group Load balancing means for switching access requests from the apparatus, and the first server group includes a plurality of web servers of the same configuration in which a plurality of websites set so as to have different subdomains are stored in parallel. The second server group connected to the load balancing means includes a plurality of webs set so that the subdomains are different from each other. A plurality of web servers of the same configuration storing sites are connected in parallel to the load distribution means, and the first server group and the second server group have the same site configuration and are accessible for access from a terminal device. On the other hand, the gist is to selectively accept access between the web server constituting the first server group and the web server constituting the second server group based on the access state of the access.

  In order to achieve the above object, the load distribution program of the present invention is a load distribution program in a computer network system that accepts access from a large number of terminal devices via the Internet, and includes a plurality of web servers. The first server group, the second server group configured to include a plurality of web servers, and the first server group and the second server group, a terminal between the web servers constituting each server group Load balancing means for switching access requests from the apparatus, and the first server group includes a plurality of web servers of the same configuration in which a plurality of websites set so as to have different subdomains are stored in parallel. The second server group connected to the load balancing means is set so that the subdomains are different from each other. A plurality of web servers having the same configuration and storing a plurality of websites are connected in parallel to the load distribution means, and the first server group and the second server group have the same site configuration, and from the terminal device A step of selectively accepting access between the web server constituting the first server group and the web server constituting the second server group based on the access state of the access to the computer device The gist is to execute.

  That is, the present invention selectively accesses the access from the terminal device by the web server constituting the first server group and the web server constituting the second server group based on the access state of the access. Accept. Further, in the first server group, the access request of the access accepted by the first server group by the load balancing means is switched between a plurality of web servers constituting the first server group, and the second server group is also switched by the load balancing means. An access request for access accepted by the two server group is switched between a plurality of web servers constituting the second server group. In addition, since each web server stores a plurality of websites that are set to have different subdomains, access is naturally distributed among the websites.

  As described above, according to the present invention, load distribution is performed one-dimensionally in the web server, load distribution is performed secondarily in each server group, and further, the first server group and the second server group By performing load distribution three-dimensionally, extremely efficient load distribution can be realized. In addition, load distribution is performed between the first server group and the second server group so as to selectively accept access based on the access state from the terminal device, so that it is appropriate according to the access state from the terminal device. Therefore, it is possible to perform a load balancing process.

  In the present invention, the first server group is configured to accept access from a terminal device in which the access state is less than a login state where login by the login permission unit is not permitted, and the second server group includes the access state Is configured to accept access from a terminal device in a login state whose login is permitted by the login permission means, it is possible to perform appropriate load distribution processing according to the access state from the terminal device. Become.

  In other words, a user of a terminal device that is accessing in a logged-in state often accesses the website for a clear purpose, such as trying to shop on the accessed website, and on the contrary, login The users of the terminal devices that are accessing in a lower state include a large number of unspecified users, and there is a tendency for many users to access the website without having a clear purpose. Therefore, the terminal time in which the number of unspecified users is less than the login state and the terminal device in the login state where there are many intended users are different in connection time, length of time for connecting to the website, etc. There is a tendency. Accordingly, by changing the server group that accepts access between the terminal device in the login state and the terminal device in the less-login state, the access of the terminal devices that tend to have different connection states such as connection time can be distributed. Software settings and hardware configurations of the server group and the second server group can be set to match the connection status such as connection time, and appropriate load balancing processing according to the access status from the terminal device can be performed. It is possible to do this.

  In the present invention, when the first server group and the second server group are configured so that the sub-domains of the website to be stored are different from each other, the terminals are provided by making the sub-domains different from each other. It is easy to selectively accept access from the apparatus, and load distribution according to the access state can be realized without making the system complicated.

  Hereinafter, the best mode for carrying out the present invention will be described.

  1 to 9 show an embodiment in which the load distribution system of the present invention is applied to an electronic commerce system.

  FIG. 1 is a network configuration diagram of a load distribution system according to the present invention. This load distribution system implements the load distribution method of the present invention by executing the load distribution program of the present invention, and the load distribution in a computer network system that accepts access from a large number of terminal devices 3 via the Internet 2 System.

  The load balancing system functions as a load balancing system that accepts access from the terminal device 3 via the Internet 2, and the terminal device of the first trader (user) and the second trader who trade with each other via the network A commercial transaction that accepts an access from a (user) terminal device and executes a transaction process performed between the terminal device of the first trader (user) and the terminal device of the second trader (user) It also functions as a system.

  This load distribution system includes a load distribution unit 4 and a first server group A configured to include a plurality of web servers 1A-1,... 1A-n connected to the load distribution unit 4, and the load And a second server group B including a plurality of web servers 1B-1... 1B-n connected to the distribution means 4.

  In this example, each web server 1A-1... 1A-n constituting the first server group A and each web server 1B-1. It is a server device that is connected to the Internet 2 as a network and enables browsing of web pages on a terminal device 3 that is also connected to the Internet 2, and each of the web servers 1A-1,... 1A-n, 1B-1,. 1B-n also has a function as a database server for providing data for constructing a web page.

  Each of the web servers 1A-1... 1A-n, 1B-1... 1B-n is a system provided with a communication interface, a large-capacity data storage device, and the like. Various functions described later are realized by reading a program recorded in the external storage device and executing processing according to the program.

  Each web server 1A-1... 1A-n constituting the first server group A and each web server 1B-1. Via an information communication network (in this embodiment, the Internet 2). A terminal device 3 used by the user is connected to the Internet 2. Each of the terminal devices 3 is a computer device such as a personal computer.

  Each of the web servers 1A-1... 1A-n, 1B-1... 1B-n is in accordance with each terminal device 3 accessed via the Internet 2 and a protocol such as HTTP (HyperText Transfer Protocol). It functions as a WEB distribution server by performing data communication. That is, each of the web servers 1A-1... 1A-n, 1B-1... 1B-n responds to a request from each terminal device 3 using a digital document description language such as HTML (HyperText Markup Language). A web page, which is data including the described document or image, is transmitted to the terminal device 3.

  Each of the web servers 1A-1... 1A-n, 1B-1... 1B-n is given a unique network address (URL). The user can access each of the web servers 1A-1... 1A-n, 1B-1... 1B-n by designating this URL on each terminal device 3, and the HTML (HyperText Data including documents and images described in a digital document description language such as Markup Language) can be viewed on a home page. Also, on the homepage, data such as documents and images and selection input operations are input as necessary, and transmitted to each of the web servers 1A-1,... 1A-n, 1B-1,. And decision-making information is transmitted with respect to each web server 1A-1 ... 1A-n, 1B-1 ... 1B-n. Details of these operations will be described later.

  The homepage is a website of the present invention, and each of the web servers 1A-1, 1A-2,... 1A-n constituting the first server group A includes a plurality of websites 101A, 102A,. Is stored. Further, the web servers 1B-1, 1B-2,... 1B-n constituting the second server group B respectively store a plurality of websites 101B, 102B,.

  The web servers 1A-1, 1A-2,... 1A-n constituting the first server group A store the same websites 101A, 102A,. Further, the web servers 1B-1, 1B-2,... 1B-n constituting the second server group B store the same websites 101B, 102B,. is there.

  Further, the first server group and the second server group have the same site configuration. That is, the websites 101A, 102A... 1nnA respectively stored in the web servers 1A-1, 1A-2... 1A-n constituting the first server group A and the second server group B are configured. The web sites 101B, 102B,..., 1nnB respectively stored in the web servers 1B-1, 1B-2,... 1B-n basically have the same content on the same website. Therefore, the first server group and the second server group have a relational structure that can serve as a backup for the other party.

  As described above, the first server group A includes the web servers 1A-1, 1A having the same site configuration in which a plurality of websites 101A, 102A,. -2 ... 1A-n are connected to a common load distribution means 4 in parallel. Further, the second server group B includes a plurality of websites 101B, 102B,... 1nnB, which are set to have different subdomains, and the web servers 1B-1, 1B-2,. .. 1B-n are connected to a common load distribution means 4 in parallel.

  In the first server group A and the second server group B, the load distribution means 4 includes web servers 1A-1,... 1A-n, 1B-1,. The access request from the terminal device 3 is switched between 1B-n.

  Each of the websites 101A, 102A... 1nnA is set to have a different subdomain, and each of the websites 101A, 102A... 1nnA stored in the first server group A has a subdomain. The websites 101B, 102B... 1nnB stored in the two server group B are configured to be different from each other.

For example, in the web servers 1A-1, 1A-2,... 1A-n constituting the first server group A, domain names can be set as shown below.
Website name Domain Website 101A http://www.abc1.shop1.com
Website 102A http://www.abc1.shop2.com
...
Website 1nnA http://www.abc1.shopn.com

Moreover, in the web server 1B-1, 1B-2 ... 1B-n which comprises the 2nd server group B, a domain name can be set as shown below.
Website name Domain Website 101B http://www.abc2.shop1.com
Website 102B http://www.abc2.shop2.com
...
Website 1nnB http://www.abc2.shopn.com

  In this case, the subdomain “abc1” is a subdomain assigned to the first server group A, and is stored in each of the web servers 1A-1, 1A-2,... 1A-n belonging to the first server group A. The websites 101A, 102A... 1nnA are set in common. Similarly, the subdomain “abc2” is a subdomain assigned to the second server group B, and is stored in each of the web servers 1B-1, 1B-2... 1B-n belonging to the second server group B. The websites 101B, 102B... 1nnB are set in common.

  Further, subdomains “shop1”, “shop2”,... “Shopn” are set as subdomains in the lower layers of the subdomains “abc1” and “abc2”. As a homepage of an Internet shop, the website 101A stored in the first server group A and the website 101B stored in the second server group B have the same site configuration, and these are the common subdomain “shop1”. Will be set.

  As described above, the first server group A and the second server group B can selectively access the terminal device 3 between the first server group A and the second server group B by making subdomains different from each other. It can be accepted and load balancing can be realized.

  Further, in the first server group A, a plurality of web servers 1A-1, 1A-2,..., 1A- that constitute the first server group A for access requests accepted by the first server group A by the load distribution means 4 are used. Switch between n to achieve load balancing. Further, also in the second server group B, a plurality of web servers 1B-1 and 1B-2 that constitute the second server group B receive access requests from the terminal device 3 that are received by the second server group B by the load distribution means 4. ... Switch between 1B-n to achieve load distribution.

  Moreover, in each of the web servers 1A-1, 1A-2,... 1A-n constituting the first server group A, there are a plurality of websites 101A, 102A,. Since it is stored, access is naturally distributed among the websites 101A, 102A... 1nnA in the respective web servers 1A-1, 1A-2. Similarly, in each of the web servers 1B-1, 1B-2,... 1B-n constituting the second server group B, a plurality of websites 101B, 102B,. Are stored in the web servers 1B-1, 1B-2,... 1B-n, and the access from the terminal device 3 is naturally distributed among the websites 101B, 102B,. To do.

  In this system, unspecified general users, specific general users (general traders), and managers are scheduled as users who use the terminal device 3. In this system, an attribute code is assigned to each user and processing is performed. As the attribute code, for example, 0 and an integer of 1 or more are used, (0) for unspecified general users, (1) (2) for general users (general traders). (X), (X + 1) is given to the system administrator.

  Here, the unspecified general user is a user in a state of less than login that accesses the web servers 1A-1, 1A-2,... 1A-n via the Internet 2 and does not perform login, which will be described later. Yes, (0) is assigned as the attribute code, and the terminal in such an access state is displayed as terminal device 3 (0) in the figure.

  For (1), (2),... (X) of general users (general traders), the traders targeted by this system are classified into traders with common industry attributes (1) ( 2) (3) ... (X) is given.

  Specifically, among general users (general traders), (1) purchases a product (customer), (2) sells a product to a customer (shop), and wholesales the product to the shop. (Wholesale) can be (3). In addition, if necessary, it can be a system that targets a group of traders of various industry attributes such as (logistics company) (delivery company) (credit card company) (payment agency) ... In this case, (4), (5),... (X) are assigned as the attribute codes.

  In the figure, the terminals that are authenticated and logged in as these users (traders) are displayed as terminal device 3 (1), terminal device 3 (2)... Terminal device 3 (X), respectively. ing.

  An integer (X + 1) larger than the largest integer (X) among the attribute codes assigned as general users (general traders) is assigned to the manager. In the figure, the terminal that is authenticated and logged in as an administrator is displayed as terminal device 3 (X + 1).

  2 is a functional block diagram showing the web server 1A constituting the first server group A, and FIG. 3 is a functional block diagram showing the web server 1B constituting the second server group B. As shown in FIG. Each of these will be described below. However, since both have basically the same configuration, the overlapping description may be omitted.

  FIG. 2 shows a web server 1A constituting the first server group A.

  The web server 1A includes a database 6A in which a plurality of tables storing various data used by the system of the present invention are stored. The database 6A is constructed by a relational database management system (RDBMS) that expresses data using a relationship between two-dimensional tables.

  The database 6A includes terminal devices 3 of general users (transactioners), for example, a terminal device 3 (1) of a customer as a first trader and a terminal device 3 (2) of a shop as a second trader. A transaction storage unit 17A is provided for storing a transaction table in which data relating to commercial transactions performed between the two is stored. Further, the database 6A includes a master storage unit 18A that stores a master table in which information on general users (traders), managers, and products is recorded.

  FIG. 4 shows an example of a master table as a user master (trader master) in which information on the user (trader) stored in the master storage unit 18A is recorded.

  In this example, a customer (attribute code (0)), a shop (attribute code (1)), a wholesaler (attribute code (2)), and an administrator (attribute code (X + 1)) are used as users (traders). An example of a system is shown, and a customer master 21, a shop master 22, a wholesale master 23, an administrator master 24, and a product master 25 are provided as master tables. If necessary, it can be a system targeting traders of various industry attributes such as logistics companies, delivery companies, credit card companies, payment agent companies, etc. A master table of a trader (trader) is prepared.

  In the customer master 21, authentication information to be referred to at the time of authentication such as a customer code, an ID, and a password is recorded as a user code for identifying a customer as a trader. In addition, the customer master 21 records customer-related information such as the customer's name, address, telephone number, FAX number, and mail address.

  In the shop master 22, authentication information to be referred to at the time of authentication such as a shop code, an ID, and a password is recorded as a user code for identifying a shop as a trader. In addition, the shop master 22 records information about the shop such as a shop name, an address, a telephone number, a FAX number, and an e-mail address.

  In the wholesale master 23, authentication information to be inquired at the time of authentication such as a wholesale code, an ID, and a password is recorded as a user code for identifying wholesale as a trader. In addition, the wholesale master 23 records wholesale information such as a wholesale name, address, telephone number, FAX number, and mail address.

  The administrator master 24 records authentication information to be inquired at the time of authentication such as an administrator code, ID, and password for identifying the administrator. In addition, the manager master 24 records information about the manager such as the name of the manager.

  Use of customer master 21, shop master 22, wholesale master 23, and authentication information such as ID / password recorded in administrator master 24, customer code, shop code, wholesale code, etc. as the user master (trader master) The administrator code and the administrator code are inquired at the time of login authentication by the login permission means 11 described later. Further, the user code and the administrator code are used when an access state is detected by the access state detection means 10 described later.

  Further, in the product master 25, information related to products handled in transactions performed between the terminal devices 3 of the respective traders is recorded, and information such as product codes, product names, prices, and the like is recorded.

  FIG. 5 is a diagram illustrating an example of a transaction table in which data related to transactions performed between the terminal devices 3 of the respective traders is recorded.

  In this example, for example, it is performed between the terminal device 3 (1) of the customer as the first trader (user) and the terminal device 3 (2) of the shop as the second trader (user). Transaction (1-2) 26 in which data related to the transaction is recorded, terminal device 3 (2) of the shop as the first trader (user), and wholesale terminal as the second trader (user) A transaction (2-3) 27 in which data related to a transaction performed with the device 3 (3) is recorded is illustrated.

  That is, in this example, as shown in FIG. 7, as a trader (user), a customer who purchases a product (attribute code (1)), sells the product to the customer and purchases the product from wholesale. A model called shop (attribute code (2)) and wholesaler (attribute code (3)) that wholesales products to the shop will be described as an example. In this example, a customer who purchases a product can be a first trader (user), and a shop that trades with the first trader (user) can be a second trader (user). In addition, in the relationship between a shop and a wholesaler, a shop that purchases a product can be a first trader (user), and a wholesaler that trades with the first trader (user) can be a second trader (user). is there.

  In this way, the first trader (user) and the second trader (user) in the present invention can be determined relatively among traders having a business relationship, and are absolute. It is not a thing.

  In this example, the transaction (1-2) 26 includes a slip No. as transaction data. Data relating to product transactions such as date, product code, quantity, amount, etc. are recorded. The transaction (1-2) 26 includes, as transaction data, a customer code as a user code for identifying the first trader (user) and a user for identifying the second trader (user). A shop code as a code is recorded.

  In the transaction (2-3) 27, a slip No. Data relating to product transactions such as date, product code, quantity, amount, etc. are recorded. The transaction (2-3) 27 includes, as transaction data, a shop code as a user code for identifying the first trader and a wholesaler as a user code for identifying the second trader (user). The code is recorded.

  The web server 1A includes a website storage unit 15A that stores a web page to be displayed on the terminal device 3 that has accessed the web server 1A via the Internet 2.

  The website stored in the website storage unit 15A is output to the terminal device 3 to display predetermined information and to allow data processing of transaction data on the web page. Such a web page is created by a static file such as the HTML document described above. A page on which transaction data is displayed and processed is configured by inserting transaction data extracted from the database 6A into a predetermined template file.

  In the web server 1A, as described above, the website storage unit 15A stores the websites 101A, 102A... 1nnA in which different subdomains are set. For example, each of the websites 101A, 102A... 1nnA is a net shop site of one internet shop.

  The web server 1A includes a program storage unit 16A that stores a program that enables data processing of the transaction table stored in the transaction storage unit 17A in the terminal device 3 accessed via the Internet 2. ing. This program includes a program composed of a SQL statement that is a database access language of a relational database management system (RDBMS), a program composed of a Java (registered trademark) servlet including a Java (registered trademark) applet, and the like. Contains.

  The web server 1A includes control means 5A that controls operations for realizing various functions of the present invention, including data processing for the database 6A, the website storage unit 15A, the program storage unit 16A, and the like.

  The control means 5A controls a static file such as an HTML file stored in the website storage unit 15A so that it can be displayed on a browser or the like of each terminal device 3, and is input on a screen displayed on each terminal device 3. Display control means 8A for performing reception control for receiving the transmitted data.

  The control means 5 includes data processing means 9A that enables various operations and processes on the web page displayed on the accessed terminal device 3. The control unit 5 includes an access state detection unit 10 </ b> A that detects an access state of the terminal device 3 that has accessed the web server 1 </ b> A via the Internet 2. The description of the data processing unit 9A and the access detection unit 10A will be described in detail when the web server 1B constituting the second server group B is described.

  Further, the web server 1A includes communication control means 13A for controlling communication with the terminal device 3 and the like via the Internet 2.

  FIG. 3 shows a web server 1B constituting the second server group B.

  The web server 1B is basically configured in the same manner as the web server 1A constituting the first server group A, and in the following description, overlapping description may be omitted.

  The web server 1B includes a database 6B in which a plurality of tables storing various data used by the system of the present invention are stored. Each of the databases 6B is constructed by a relational database management system (RDBMS).

  The database 6B includes a transaction storage unit 17B and a master storage unit 18B. The transaction table and master table respectively stored in the transaction storage unit 17B and the master storage unit 18B are the same as those described in the website 1A.

  The web server 1B includes a website storage unit 15B that stores a web page to be displayed on the terminal device 3 that has accessed the web server 1B via the Internet 2.

  In the web server 1B, as described above, the website storage unit 15B stores the websites 101B, 102B... 1nnB in which different subdomains are set. For example, each of the websites 101B, 102B... 1nnB is a net shop site of one internet shop.

  Further, the web server 1B includes a program storage unit 16A that stores a program that enables data processing of the transaction table stored in the transaction storage unit 17B in the terminal device 3 accessed via the Internet 2. ing. This program includes a program composed of a SQL statement that is a database access language of a relational database management system (RDBMS), a program composed of a Java (registered trademark) servlet including a Java (registered trademark) applet, and the like. Contains.

  The web server 1B includes control means 5B that controls operations for realizing various functions of the present invention, including data processing for the database 6B, the website storage unit 15B, the program storage unit 16B, and the like.

  The control means 5B controls a static file such as an HTML file stored in the website storage unit 15B so that it can be displayed on a browser or the like of each terminal device 3, and is input on a screen displayed on each terminal device 3. And display control means 8B for performing reception control for receiving the transmitted data.

  The control means 5 includes data processing means 9B that enables various operations and processes on the web page displayed on the accessed terminal device 3. The control unit 5 includes an access state detection unit 10B that detects the access state of the terminal device 3 that has accessed the web server 1B via the Internet 2.

  Further, the web server 1B includes communication control means 13B for controlling communication with the terminal device 3 and the like via the Internet 2.

  The control means 5B performs login by collating the information recorded in each master table stored in the master storage unit 18B which is a user master (trader master) with respect to access from each terminal device 3. A login permission unit 11 is provided.

  The web server 1B that constitutes the second server group B is different from the web server 1A that constitutes the first server group A described above in that it includes the login permission means 11.

  And in this invention, with respect to the access from the terminal device 3, based on the access state of the access, the web server 1A constituting the first server group A and the web server 1B constituting the second server group B It is configured to accept access selectively.

  That is, as described above, the first server group A and the second server group B have different subdomains, and the first server group A is permitted to log in by the login permission means 11 in the access state. The second server group B accepts an access from the terminal device 3 in the login state in which the login state is permitted by the login permission unit 11. It is configured as follows. Thereby, the access from the terminal device 3 can be selectively received by the first server group A and the second server group B, and load distribution can be realized.

  Specifically, the terminal device 3 accessed without logging in to the system is first connected to the web servers 1A-1, 1A-2,... 1A-n configuring the first server group A.

  Then, the terminal device 3 logs in to each of the websites 101A, 102A... 1nnA stored in the web servers 1A-1, 1A-2,. A link to the login page is provided.

  In order for the terminal device 3 connected to the web servers 1A-1, 1A-2,... 1A-n constituting the first server group A to log in, the user logs in by clicking the link to the login page. The page is displayed on the terminal device 3. On this login page, login can be performed by inputting and transmitting authentication information such as a predetermined ID and password.

  Here, the link to the login page is provided on the web sites 101A, 102A... 1nnA stored in the web servers 1A-1, 1A-2,. However, the login page 19 displayed by the above link is the web site 101B, 102B... 1nnB stored in the web server 1B-1, 1B-2. Are provided respectively.

  That is, when accessing the first server group A in a state less than the login state as described above, the subdomain (for example, “abc1” described above) set in the first server group A is used. When accessing the login page 19 and accessing the second server group B in the login state after login authentication, the subdomain (for example, “abc2” described above) set in the second server group B is used. It is.

  The login authentication by the login page 19 is performed by the login permission means 11, and the access after the login authentication is performed by the web servers 1B-1, 1B-2,... 1B- constituting the second server group B. n is accepted.

  As described above, the first server group A and the second server group B can selectively access the terminal device 3 between the first server group A and the second server group B by making subdomains different from each other. It can be accepted and load balancing can be realized.

  For example, when the terminal device 3 accesses the web server 1B by specifying a predetermined network address (URL) via the Internet 2, the login control unit 11 displays a predetermined login screen by the display control unit 8B. Displayed on the device 3 to prompt for input of ID and password. The ID and password entered on this login screen are accepted, and the ID and password recorded in the user master (trader master) such as the customer master 21, shop master 22, wholesale master 23 and manager master 24 are collated. If the correct ID and password are entered, login is permitted. If the entered ID and password are not correct, an error message is displayed.

  In this system, the data update of the user master (trader master) is not permitted from the terminal device 3 in a state of less than login where the authentication is not performed. That is, unless logged in, the data update screen is not output and displayed on the terminal device 3. On the other hand, in the logged-in login state, the terminal device 3 is allowed to update the data of the user master (trader master), and the data update screen is displayed on the terminal device 3 so that the data processing means 9 can update the data. .

  For example, when the ID and password recorded in the customer master 21 are entered and authenticated in the terminal device 3 used by the customer, (1) is given as the attribute code and recognized as the customer's terminal device 3 (1). The In this way, in the terminal device 3 (1) recognized as the customer's terminal device 3 (1), the master information update page is displayed in response to the request from the terminal device 3 (1), and the customer of the customer master 21 The customer data can be updated. Specifically, it is a change of e-mail address or the like.

  Similarly, in the terminal device 3 used by the shop, when the ID and password recorded in the shop master 22 are inputted and authenticated, (2) is given as the attribute code and recognized as the terminal device 3 (2) of the shop. Is done. Further, when the terminal device 3 used by the wholesaler is authenticated by inputting the ID and password recorded in the wholesale master 23, the attribute code (3) is given and recognized as the wholesale terminal device 3 (3). The

  When the terminal device 3 (2) or the wholesale terminal device 3 (3) is recognized as described above, the master information is updated in response to requests from the terminal devices 3 (2) and 3 (3). The page is displayed and the shop master 22 and wholesale master 23 can update the shop and wholesale data.

  FIG. 6 shows an example of the detection table 28 for detecting the access state by the access state detection means 10A, 10B.

  The access state detection means 10A, 10B is a login state in which login is permitted by the login permission means 11 as an access state from the terminal device 3, and data update of the user master (trader master) is permitted from the terminal device 3. Then, the login permission means 11 detects that the login is not permitted, and the terminal device 3 detects a less-login state in which the data update of the user master (trader master) is not permitted.

  The login state is basically a state in which the user (transactioner) can be identified by referring to the master table based on the ID and password input in the accessed terminal device 3. In this login state, since the user of the terminal device 3 who has accessed is a user (transactioner) or administrator of a customer, shop, wholesale, etc., the attribute code is (1) (2) (3) .. A numerical value of 1 or more is given as (X) and (X + 1).

  On the other hand, if the login is less than the above, basically, the terminal device 3 that has been accessed has not been entered with an ID, password, etc., and the user (transactioner) using the terminal device 3 cannot be identified. State. In this under-login state, the number of users of the terminal device 3 who have accessed is unspecified, and the access state is recognized as an unspecified state, and (0) is assigned as the attribute code.

  In addition, the access state detection means 10A and 10B receive the user information input in the terminal device 3 while the login authentication by the login permission means 11 is not performed as the access state from the terminal device 3. A first pseudo login state is further detected. The first pseudo login state refers to, for example, a user (transactioner) who has not registered as a user accesses the web server 1A, 1B with his / her terminal device 3 (0) and displays a user registration screen. In the user registration screen, information relating to the user (trader) is input and transmitted to the web servers 1A and 1B, and the web server 1A and 1B accepts the information as a new user (trader). It is.

  In this first pseudo login state, the user is not logged in, but is not an unspecified user (transactioner), and user (transactioner) information that can specify the user (transactioner) is stored in the web server. Since it is in the state accepted by 1A, it is in a state less than login, but is recognized as a first pseudo login state, not an unspecified state. In the first pseudo login state, login authentication by the login permission means 11 is not performed, so that information in the master table cannot be rewritten by the terminal device 3.

  Moreover, in this 1st pseudo login state, the information of the accepted user (trader) is not written in the master table. Thereafter, data is recorded in the customer master 21 if this new user (transactioner) is a customer, data is recorded in the shop master 22 if it is a shop, and data is recorded in the wholesale master 23 if it is wholesale. As described above, when the user (transactioner) information is recorded in the master table, the first pseudo login state is canceled, and the access state can be recognized as the login state.

  In addition, the access state detection means 10A and 10B are states in which the user information in the master table is read out in the terminal device as the access state from the terminal device 3 while the login authentication by the login permission means 11 is not performed. The second pseudo login state is further detected. The second pseudo login state refers to, for example, a user (transactioner) who has been registered as a user accesses the web server 1A, 1B with his / her terminal device 3 (0) and performs login authentication by the login permission means 11. Although it does not do, it is the state which called ID and the password, and called own user (transactioner) data from the master table.

  Specifically, for example, before a customer logs in, after a product list screen is displayed and a desired product is selected, a shopping cart screen is displayed and an ID and a password are input. The customer information, which is data, is called from the customer master 21 and written in the transaction.

  In this second pseudo-login state, the user is not logged in, but is not an unspecified user (transactioner), and user (transactioner) information that can specify the user (transactioner) is stored in the master table. Since it is a state read from, it is recognized as a second pseudo login state, not an unspecified state, although it is a state less than the login state. In the second pseudo login state, login authentication by the login permission means 11 is not performed, so that information in the master table cannot be rewritten by the terminal device 3.

  Further, the access state detection means 10A and 10B detect the access state of the terminal device 3 whose login is permitted by the login permission means 11.

  That is, the access state detection unit 10 detects which attribute code is assigned to the terminal device 3 to which the terminal device 3 authenticated by the login permission unit 11 is assigned. Specifically, depending on whether the ID and password input at the time of login by the terminal device 3 are the customer, the shop or the wholesale, the attribute code (1) is given to the customer. If so, the attribute code (2) is assigned. If wholesale, the attribute code (3) is assigned. However, at this time, it is detected which attribute code (1) to (X) is assigned. is there.

  Thus, if the access state detected by the access state detection means 10 is an access to which the attribute codes (1) to (X) are assigned, login is permitted with the access state as a general user (transactioner). Recognized as a general user (trader) status. Further, by detecting which attribute code (1) to (X) is given access by the access status detection means 10, the login authenticated access status is authenticated as the first trader in the present invention. It is detected whether the state is one trader state or the second trader state authenticated as the second trader in the present invention.

  Further, the access status detection means 10A and 10B further detect the status of the administrator who has been authenticated and logged in as the status of access from the terminal device 3. That is, in the terminal device 3 used by the administrator, when the ID and password recorded in the administrator master 24 are input and authenticated, (X + 1) is given as an attribute code, and the administrator terminal device 3 (X + 1) ). In this way, in the terminal device 3 (X + 1) recognized as the administrator terminal device 3 (X + 1), a master information update page is displayed in response to a request from the terminal device 3 (X + 1). The administrator data can be updated.

  In addition, the login permission unit 11 is more general to the terminal device 3 (X + 1) in which the access state detected by the access state detection units 10A and 10B is an administrator state in which login is permitted and authenticated as an administrator. Allow additional authentication as a user (trader). That is, an additional authentication screen is displayed on the administrator-dedicated menu displayed on the terminal device 3 (X + 1) in the access state authenticated as the administrator, and the customer (shop, wholesaler, etc.) as the additional authentication information ) Is prompted for input of ID and password, and additional authentication is performed as a general user (transactioner) of the input ID and password.

  At this time, the access state detection means 10A and 10B recognize and detect the access state from the terminal device 3 as a pseudo general user state after logging in as an administrator and further receiving additional authentication as a general user. To do.

  That is, if the authentication information for additional authentication is the customer ID and password, the terminal device 3 (X + 1) in the manager state is recognized as a pseudo customer state that is the customer terminal device 3 (1). . If the authentication information for additional authentication is the shop ID and password, the terminal device 3 (X + 1) in the manager state recognizes it as a pseudo shop state that is the terminal device 3 (2) in the shop, and adds If the authentication information for authentication is a wholesale ID and password, the terminal device 3 (X + 1) in the administrator state is recognized as a pseudo-wholesale state such as the wholesale terminal device 3 (3).

  Thus, with respect to the terminal device 3 (X + 1) authenticated as the administrator, the first trader (user) or the second trader (utilization) that is a general user in the present invention such as a customer, shop, wholesale, etc. And the master data of the additionally authenticated customer, shop, and wholesaler can be updated to the terminal device 3 (X + 1) of the administrator who has been additionally authenticated as a general user. That is, since the master information update page of the customer (or shop, wholesale, etc.) with the additionally authenticated ID is displayed, the customer, shop, wholesale data of the customer master 21, shop master 22, and wholesale master 23 can be updated. is there.

  The data processing means 9 </ b> A and 9 </ b> B process the transaction table stored in the transaction storage unit 17 of the database 6 by a program composed of SQL statements stored in the program storage unit 16. The data processing here refers to processing such as search of a transaction table, extraction of transaction data, display of extracted transaction data, change or update of displayed transaction data, addition of transaction data, and the like.

  The data processing means 9A and 9B are connected to the terminal device 3 in the first trader (user) state in which the access state detected by the access state detection means 10A and 10B is authenticated as the first trader (user). On the other hand, transaction data having the user code of the first trader (user) in the transaction table is extracted and the data processing is enabled. Further, the data processing means 9A, 9B are terminal devices in a second transaction (user) state in which the access status detected by the access status detection means 10A, 10B is authenticated as the second transaction (user). 3, transaction data having the user code of the second trader (user) in the transaction table is extracted, and the data processing is enabled. By doing in this way, the terminal device 3 of a 1st trader (user) and the terminal device 3 of a 2nd trader (user) are the data processing of a common transaction table by common data processing means 9A, 9B. Can be done.

  Specifically, if the access state detected by the access state detection means 10A, 10B is the terminal device 3 (1) to which the customer's attribute code is assigned, the transaction (1-2) 26 The transaction data of the customer code of the authenticated customer is extracted and displayed as a list, and the change / update / deletion, etc. can be performed. If the access status detected by the access status detection means 10A, 10B is the terminal device 3 (2) to which the shop attribute code is assigned, the transaction (1-2) 26 and / or the transaction (2-3) The transaction data of the shop code of the authenticated shop is extracted from 27 and displayed as a list, and the change / update / deletion thereof can be performed. If the access status detected by the access status detection means 10A, 10B is the terminal device 3 (3) to which the wholesale attribute code is assigned, the authenticated wholesale from the transaction (2-3) 27. The transaction data of the wholesale code is extracted and displayed as a list, and it is possible to change, update, delete, etc.

  Further, the data processing means 9A and 9B provide the transaction table to the terminal device 3 that is further authenticated as the first trader (user) from the terminal device 3 (X + 1) whose access state is the administrator state. The transaction data having the user code of the first trader (user) is extracted and the data processing is enabled. Further, the data processing means 9A, 9B provides the second transaction person (user) in the transaction table to the terminal device 3 whose access state is further authenticated as the second trader (user) from the administrator state. ) To extract transaction data having the user code and enable the data processing.

  Specifically, an additional authentication screen is displayed in the administrator-only menu displayed on the terminal device 3 (X + 1) in the access state authenticated as the administrator, and the customer (shop, wholesale, etc.) user (additional authentication information) The user is prompted to input an ID and a password that are authentication information of the trader, and is additionally authenticated as a user (trader) of the entered ID and password. In this way, for the terminal device 3 (X + 1) in the manager state additionally authenticated as a trader, it is possible to update the transaction data of the additionally authenticated customer, shop, and wholesale.

  The data processing means 9A and 9B also update master data in the terminal device 3 in the login state as described above. That is, the master table stored in the master storage unit 18B of the database 6 is data-processed by a program composed of SQL statements stored in the program storage unit 16B. Data processing here refers to processing such as searching a master table, extracting master data, displaying extracted master data, changing or updating displayed master data, and adding master data.

  Further, the data processing means 9A and 9B are the data of transaction data and master data by the terminal device 3 (X + 1) of the administrator who has entered the pseudo general user state who is additionally authenticated as a general user after logging in as the administrator. Processing is also performed. Furthermore, data processing in the first pseudo login state and the second pseudo login state is also performed.

  FIG. 7 is a diagram schematically showing a state in which the terminal device 3 (X + 1) authenticated as the administrator performs additional authentication as a pseudo general user and accesses as the pseudo general user state. Moreover, the relationship between the traders who use each terminal device 3, and the state in which each trader and the manager perform data processing of the transaction table in the terminal device 3 are also shown schematically.

  First, in this example, a business transaction is performed between a customer and a shop, and a common transaction (1-2) 26 is used. That is, the customer terminal device 3 (1) and the shop terminal device 3 (2) access the web servers 1A and 1B, respectively, and store the common transaction (1-2) 26 stored in the transaction storage unit 17. Data processing is performed (arrow A in the figure).

  Further, a commercial transaction is performed between the shop and the wholesaler, and a common transaction (2-3) 27 is used. That is, the shop terminal device 3 (2) and the wholesale terminal device 3 (3) access the web servers 1A and 1B, respectively, and store the common transaction (2-3) 27 stored in the transaction storage unit 17. Data processing is performed (arrow B in the figure).

  That is, if the access state detected by the access state detection means 10A, 10B is the terminal device 3 (1) to which the customer's attribute code is assigned, the authentication is made from the transaction (1-2) 26. The transaction data of the customer code of the selected customer is extracted and displayed as a list, and it is possible to change, update, delete, etc. If the access state detected by the access state detection means 10 is the terminal device 3 (2) to which the shop attribute code is assigned, the authenticated shop is obtained from the transaction (1-2) 26. The transaction data of the shop code is extracted and displayed as a list, and it is possible to change, update, delete, etc.

  Further, if the access status detected by the access status detection means 10A, 10B is the terminal device 3 (2) to which the shop attribute code is assigned, the authentication is made from the transaction (2-3) 27. The transaction data of the shop code of the selected shop is extracted and displayed as a list, and it is possible to change, update, delete, etc. If the access status detected by the access status detection means 10A, 10B is the terminal device 3 (3) to which the wholesale attribute code is assigned, the authenticated wholesale from the transaction (2-3) 27. The transaction data of the wholesale code is extracted and displayed as a list, and it is possible to change, update, delete, etc.

  In addition, an additional authentication screen is displayed in the administrator-only menu displayed on the terminal device 3 (X + 1) in the access state authenticated as the administrator, and the customer (shop), customer, shop, wholesaler, etc. as additional authentication information The user is prompted to input the ID and password, which are the authentication information, and is additionally authenticated as the user (transactioner) of the input ID and password. The state of additional authentication as a customer is indicated by arrow C in the figure, the state of additional authentication as a shop is indicated by arrow D in the figure, and the state additionally authenticated as wholesale is indicated by arrow E in the figure.

  As described above, the terminal device 3 (X + 1) in the manager state additionally authenticated as a customer, shop, wholesaler, etc., is added to the additionally authenticated customer, shop, wholesale terminal devices 3 (1), 3 (2), 3 As a result, the transaction (1-2) 26 and (2-3) 27 can be updated.

  Thus, by using a common transaction table with a plurality of traders, the transaction table can be saved and the processing load can be reduced. Further, the terminal device 3 (X-1) authenticated as an administrator is additionally authenticated as a transaction person, and the transaction table can be updated, thereby reducing the number of programs composed of SQL statements for data processing. be able to.

  Further, as described above, if the access status detected by the access status detection means 10A, 10B is the terminal device 3 (1) to which the customer attribute code is assigned, the authentication is received from the customer master 21. The master data of the customer code of the selected customer is extracted and displayed as a list, and can be changed / updated / deleted (arrow F in the figure). Similarly, if the detected access state is the terminal device 3 (2) to which the shop attribute code is assigned, the master code of the shop code of the authenticated shop is extracted from the shop master 22. If the terminal device 3 (3) is displayed in a list and can be changed / updated / deleted (arrow G in the figure) and the detected access state is assigned with the wholesale attribute code, the wholesaler Master data of the authorized wholesale code is extracted from the master 23 and displayed in a list so that it can be changed / updated / deleted (arrow H in the figure).

  If the access status detected by the access status detection means 10A, 10B is the terminal device 3 (X + 1) to which the administrator's attribute code is assigned, the authenticated management from the administrator master 24 is performed. The master data of the administrator's manager code is extracted and displayed in a list, and can be changed / updated / deleted (arrow I in the figure).

  Further, as indicated by the arrows C, D and E described above, an additional authentication screen is displayed on the administrator-only menu displayed on the terminal device 3 (X + 1) in the access state authenticated as the administrator, and additional authentication information is displayed. In the case of a pseudo general user state that prompts the user to enter ID and password, which are authentication information of customers (shops), wholesalers, etc., and additionally authenticates the user (transactioner) of the entered ID and password , Additional authenticated customer, shop, wholesale terminal devices 3 (1), 3 (2), 3 (3) are authenticated, and data can be updated by customer master 21, shop master 22, wholesale master 23, respectively. The data can be updated.

  8-10 is a figure explaining the effect | action of the said load distribution system. In the following description, in the figure, the accessed website is described with diagonal lines.

  First, as shown in FIG. 8, for the terminal device 3 (0) accessed without logging in to the system, the web servers 1A-1, 1A-2,. n. In this example, since the website 101A is a homepage of the same net shop, all of the webs constituting the first server group A are connected to the terminal devices 3 that have accessed the same website 101A in a state of less than login. The servers 1A-1, 1A-2,... 1A-n are connected. At this time, for a plurality of access requests having overlapping access times, the load distribution means 4 switches the access to the web servers 1A-1, 1A-2,... 1A-n constituting the first server group A. To disperse.

  Next, as shown in FIG. 9, when there is an access to the website 103B or the like of a shop different from the shop of the website 101A in a state less than the login, the websites 101A and 102A are accessed in the same web server 1A-1. ... Access is distributed among 1nnA.

  When the link to the login page provided in the website 101A stored in the web server 1A-1 constituting the first server group A is clicked, as shown in FIG. The connection is switched to the web server 1B-1 constituting the second server group B, and a login page provided in the website 101B stored therein is displayed, and a login operation is performed. In the login state after the login authentication, access is accepted by the web server 1B-1 configuring the second server group B.

  Also in the second server group B, similarly to the first server group A, the web server 1B-1 constituting the second server group B is handled by the load distribution means 4 for a plurality of access requests having overlapping access times. 1B-2... 1B-n, switching access and distributing. Further, when there is a login to the website 103B of a shop different from the shop of the website 101B in the login state, the websites 101B, 102B... Distribute access.

  As described above, according to the present invention, for the access from the terminal device 3, the web servers 1A-1, 1A-2,... 1A- constituting the first server group A are based on the access state of the access. n and web servers 1B-1, 1B-2,... 1B-n constituting the second server group B selectively accept access. Further, in the first server group A, a plurality of web servers 1A-1, 1A-2,... 1A- constituting the first server group A access requests received by the first server group A by the load distribution means 4 are received. n, and even in the second server group B, a plurality of web servers 1B-1, 1B-2,. ..Switch between 1B-n.

  Moreover, in each of the web servers 1A-1, 1A-2,... 1A-n constituting the first server group A, there are a plurality of websites 101A, 102A,. Since it is stored, access is distributed among the websites 101A, 102A... 1nnA. Similarly, in each of the web servers 1B-1, 1B-2,... 1B-n constituting the second server group B, a plurality of websites 101B, 102B,. Is stored, the access is distributed among the websites 101B, 102B... 1nnB.

  As described above, the present invention performs load distribution one-dimensionally within the web servers 1A-1, 1A-2,... 1A-n, 1B-1, 1B-2,. Load distribution is performed secondarily among the server groups A and B, and furthermore, load distribution is performed three-dimensionally between the first server group A and the second server group B, so that extremely efficient load distribution is performed. Can be realized. Moreover, since load distribution is performed between the first server group A and the second server group B so as to selectively accept access based on the access state from the terminal device 3, the access state from the terminal device 3 Therefore, it is possible to perform appropriate load distribution processing according to the situation.

  In the present invention, the first server group A is configured to accept access from the terminal device 3 in which the access state is less than the login state in which login by the login permission unit 11 is not permitted, and the second server group B is When the access state is configured to accept access from the terminal device 3 in the login state in which login is permitted by the login permission unit 11, appropriate load balancing according to the access state from the terminal device 3 Processing can be performed.

  That is, the user of the terminal device 3 accessing in the logged-in state often accesses the website for a clear purpose such as trying to shop at the accessed website. The users of the terminal device 3 accessing in a state less than the login state include many unspecified users, and there is a tendency for many users to access the website without having a clear purpose. Therefore, in the terminal device 3 (0) in the less-logged-in state where there are many unspecified users and the terminal devices (1) to (X + 1) in the logged-in state where there are many intended users, the connection time or website There is a tendency that the duration of the connection is different. Therefore, the connection state such as the connection time differs between the terminal devices 3 (1) to (X + 1) in the login state and the terminal devices 3 (0) in the less-login state by changing the server groups A and B that accept access. By distributing access of terminal devices 3 that tend to be set, software settings and hardware configurations of the first server group A and the second server group B can be set to match the connection state such as connection time. This makes it possible to perform appropriate load distribution processing according to the access state from the terminal device 3.

  In the present invention, when the first server group A and the second server group B are configured so that the sub-domains of the website to be stored are different from each other, the sub-domains are different from each other. Thus, it is easy to selectively accept access from the terminal device, and load distribution according to the access state can be realized without making the system complicated.

It is a network block diagram which shows the system of one Embodiment of this invention. It is a functional block diagram of the web server which comprises a 1st server group. It is a functional block diagram of the web server which comprises a 2nd server group. It is a figure which shows an example of a master table. It is a figure which shows an example of a transaction table. It is a figure which shows an example of the detection table for detecting an access state. It is a figure explaining the function of the system of this invention. It is a figure explaining the effect | action of the system of this invention. It is a figure explaining the effect | action of the system of this invention. It is a figure explaining the effect | action of the system of this invention.

Explanation of symbols

1A, 1B Web server 2 Internet 3 Terminal device 4 Load distribution means 5A, 5B Control means 6A, 6B Database 8A, 8B Display control means 9A, 9B Data processing means 10A, 10B Access status detection means 11 Login permission means 13A, 13B Communication Control means 15A, 15B Website storage unit 16A, 16B Program storage unit 17A, 17B Transaction storage unit 18A, 18B Master storage unit 19 Login page 21 Customer master 22 Shop master 23 Wholesale master 24 Administrator master 25 Product master 26 Transaction (1 -2)
27 Transaction (2-3)
28 Detection Table 101A, 102A, 103A, 1nnA Website 101B, 102B, 103B, 1nnB Website

Claims (5)

A load distribution system in a computer network system that accepts access from a large number of terminal devices via the Internet,
A first server group configured to include a plurality of web servers;
A second server group configured to include a plurality of web servers;
In each of the first server group and the second server group, load balancing means for switching an access request from a terminal device between web servers constituting each server group,
The first server group is configured by connecting a plurality of web servers of the same site configuration storing a plurality of websites set so that the subdomains are different from each other, connected in parallel to the load balancing unit,
The second server group is configured by connecting a plurality of web servers having the same configuration in which a plurality of websites set to have different subdomains are connected to a load balancing unit in parallel,
The first server group and the second server group have the same site configuration.
Based on the access status of the access, the web server that constitutes the first server group and the web server that constitutes the second server group are configured to selectively accept access from the terminal device. A load balancing system characterized by that. The first server group is configured to accept access from a terminal device in which the access state is less than a login state in which login by the login permission unit is not permitted,
The load distribution system according to claim 1, wherein the second server group is configured to receive access from a terminal device in a login state in which the access state is permitted to be logged in by a login permission unit.   3. The load distribution system according to claim 1, wherein the first server group and the second server group are configured so that subdomains of websites to be stored are different from each other. A load distribution method in a computer network system that accepts access from a large number of terminal devices via the Internet,
A first server group configured to include a plurality of web servers;
A second server group configured to include a plurality of web servers;
In each of the first server group and the second server group, load balancing means for switching an access request from a terminal device between web servers constituting each server group,
In the first server group, a plurality of web servers having the same configuration in which a plurality of websites set to have different subdomains are stored are connected in parallel to the load balancing means,
In the second server group, a plurality of web servers having the same configuration in which a plurality of websites set to have different subdomains are stored are connected in parallel to the load balancing means,
The first server group and the second server group have the same site configuration.
In response to access from a terminal device, based on the access state of the access, selectively accepting access between the web server constituting the first server group and the web server constituting the second server group. A characteristic load balancing method. A load distribution program in a computer network system that accepts access from a large number of terminal devices via the Internet,
A first server group configured to include a plurality of web servers;
A second server group configured to include a plurality of web servers;
In each of the first server group and the second server group, load balancing means for switching an access request from a terminal device between web servers constituting each server group,
In the first server group, a plurality of web servers having the same configuration in which a plurality of websites set to have different subdomains are stored are connected in parallel to the load balancing means,
In the second server group, a plurality of web servers having the same configuration in which a plurality of websites set to have different subdomains are stored are connected in parallel to the load balancing means,
The first server group and the second server group have the same site configuration.
For the access from the terminal device, a step of selectively accepting access between the web server constituting the first server group and the web server constituting the second server group based on the access state of the access. A load distribution program that is executed by a computer device.

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