KR100227795B1 - Method of sourcing application server on the web - Google Patents

Abstract

The present invention relates to a method of providing a web service, wherein a CGI program or an application server in a CGI or an application server type web is created and destroyed for each service request, raising the cost, which is not suitable for an effective web service. Therefore, according to the present invention, a process is configured as a web gateway, a dispatcher, and an application server using a CGI-based application server model, a plurality of application servers are re- And when the allocated application server resource completes the service, the application server resource is released to return to the resource pool to reduce the cost of generating and destroying the process, and at the same time, A method is presented.

Description

How to Reconfigure Application Servers on the Web

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a web service providing method, and more particularly,

Existing web services use a common gateway interface (CGI) program or an application server method through a web gate or a dedicated server method. The method of directly accessing a database using CGI is a method of accessing a database Each time you run a new database application. Therefore, the cost of creating / destroying the program becomes wasted. In addition, since a database application server generally has a large number of libraries and data linked together for database connection, when many users use the application at the same time, a lot of processes may generate memory shortage. This method is not suitable for a system that serves a high speed and a large number of users on the Web.

Applying the existing methods by CGI or general application server causes a decrease in the performance of the Web system due to frequent generation and destruction of processes and load due to the startup of the database system for each service. Therefore, CGI and general application servers are not suitable for providing effective web services. On the other hand, the load of process creation / destruction is reduced due to the resource conversion of the application server, and the load due to the startup of the database system can be reduced as resources of the application server are made available.

Accordingly, it is an object of the present invention to improve service performance of a multimedia database management system on the web through resource conversion of an application server.

According to another aspect of the present invention, there is provided a method for controlling a dispatcher, including: operating a dispatcher by activating a web system; initializing related information of the application server and obtaining environment variables necessary for the operation; Connecting a database to a necessary application server by using a variable value and activating the database; placing the activated application server in a resource pool; and determining whether a message is received from a user or an application server in the dispatcher Checking whether a message having been received has been received when a check result message indicating that the message has been received is checked; and if it is determined that the received message is not received, To check whether the state of each application server is in a normal state And checking whether a message has been received if the check result of each of the application servers indicates that the message has been received. In the case where there is an abnormal application server in the check result of each application server, The method comprising the steps of: initializing an application server in an abnormal state after retrieving a service request; setting, in case of a resource deallocation request message according to a result of the checking of the message type, and information for maintaining a state after initializing the application server in an abnormal state And returning the application server which has terminated the service to the resource pool; returning the application server which has terminated the service to the resource pool and checking whether a message has been received; Message, the load of the application servers of the resource pool is evaluated, The method comprising the steps of: allocating a small number of application servers; transitioning to a step of checking whether a message has been received after instructing the allocated application server to process a request service; .

FIG. 1 is a hardware configuration diagram to which the present invention is applied; FIG.

FIG. 2 is a process configuration diagram of a web system according to the present invention; FIG.

FIG. 3 is a flowchart illustrating an operation of an application server resource conversion method according to the present invention;

DESCRIPTION OF THE REFERENCE NUMERALS

11: Host 12: Disk

13: Internet 14: Client

21: Web Client 22: External Inspector

23: Web server 24: Web gateway

25: Dispatcher 26: Resource pool

27: The sea - Database management system

28: Database 29: Application server

The present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a diagram of a hardware configuration to which the present invention is applied. The client (client) 14 is composed of a plurality of personal computers (PC) or terminals. A host system (HOST) 11, which is a UNIX system, is interconnected with a disk (DISK) 12, which is an auxiliary storage, and is interconnected with a client 14 via an INTERNET. As described above, the present invention operates in a general hardware environment in which a client and a host computer connected to the Internet exist.

2 is a process structure diagram of a web system according to the present invention. The Web client 21, the Web server 23, the CGI program Web gateway 24, and the application server of the resource pool 26 according to the user's request, A resource pool 26 composed of a plurality of application servers, an application server 29 for providing a service requested by an actual user, A database management system (hereinafter referred to as DBMS) 27 connected to the database, and a database 28 having data for the service.

The components of the application server resource conversion method on the web according to the present invention include a web gateway 24, a dispatcher 25, and an application server 29. The application server, which is a kind of CGI type, do. The main role of application server resource reclamation is to run the database system at the resource reclamation point of the application server and to reuse each application server and database together. The application server 29 is connected to the database 28 by any application program capable of processing the service request of the web client 21. The application server 29 is always waiting for a user to access the database 28. A plurality of application servers are constituted to generate a resource pool 26 and the dispatcher 25 manages the resource pool 26 so that the load on the service request of the web client 21 can be appropriately adjusted in various processes. Since the user request is transmitted through the web server 23, if the web server 23 immediately executes the application server 29, the application server 29 is continuously generated, thereby causing the existing problems to be solved. In order to solve this problem, a web gateway 24, which is a small-sized stub using CGI, and a dispatcher 25, which is a daemon process, are provided between the web server 23 and the application server 29, (29) can be relayed. The web gateway 24 transmits the request of the web server 23 to the dispatcher 25 and receives the processing result from the application server 29 and transfers the processing result to the web server 23. The dispatcher 25 provides a processing function of the web gateway 24 to the application server 29, a role of maintaining the status and information of the application server 29, and a recovery function of the processing of the request. In practice, the application server 29 sends a request to the dispatcher 25, It is executed in advance with the DBMS 27. When a request for this database service is received via the Web, the Web gateway 24, which is a stub by the Web server 23, is executed, and the Web gateway 24 sends the service request together with the information received from the Web server 23 To the dispatcher 25. The dispatcher 25 grasps the load of the application servers in the resource pool 26 and requests the appropriate application server for processing. The processing result of the application server 29 is transmitted to the web gateway 24 which has requested the processing, and the web gateway 24 transmits the received data to the web server 23 and ends its execution.

FIG. 3 is a flowchart of an application server resource conversion method according to the present invention. The operation is performed as follows. When the dispatcher is activated by the activation of the web system (301), the related information of the application server is initialized (302) and the value of the environment variable necessary for the operation is obtained (303). Using the initialized information and environment variable values, connect the database to the required application server and start it. The activated application server is inserted into the resource pool (304). The dispatcher that has initialized the system and entered the endless loop process checks whether a message is received from the user or the application server (305). When a check result message is received, it is checked (306) what kind of message is received. If the application server that terminates the service according to the result of checking the message type is a message requesting the release of the resource allocation, it sets the information for maintaining the state, inserting the requesting application server into the resource pool and checking whether the message is received (307). As a result of checking whether the message has been received, if there is no received message, it is checked whether each application server currently registered is in a normal state (308). If the result of the check is a normal state, the process transitions to step 305 to check whether a message has been received. If it is determined that there is an application server in an abnormal state, the application server retrieves the requested service request and returns it to the new application server (309), removes the process, and initializes the related information (310). If necessary, a new application server is created and the process proceeds to step 311. If it is determined in step 306 that the kind of the message is a service request message, the load of the application servers in the resource pool is evaluated and the application server having the least load is allocated in step 311. And then proceeds to step 305 to check whether the message has been received after instructing the selected application server to process the request service. If the check result in step 306 is YES, the overall process is terminated.

As described above, according to the present invention, the workload of the application server can be uniformly adjusted, the speed of the service can be increased, the load of the host system can be greatly reduced, and the performance can be improved.

Claims (1)

The method comprising the steps of: operating a dispatcher by activation of a web system; initializing related information of the application server and obtaining environment variables necessary for the operation; A step of inserting the activated application server into a resource pool, a step of initializing the system and checking whether a message has been received from a user or an application server, the dispatcher having entered the endless circulation process, The method comprising the steps of: examining whether a message of a certain type has been received when an inspection result message indicating that the message has been received; Checking whether each application A step of checking whether a message has been received in the case of a normal state as a result of checking whether an abnormal application server exists in an abnormal state; The method comprising the steps of: initializing an application server in a state of an application server in a state of being in an abnormal state, Returning the application server that has terminated the service to the resource pool and checking whether a message has been received; and if the message type is a service request message of the message type, Evaluate the load on the servers to make the least loaded application server The method of claim 1, further comprising the steps of: determining whether a message has been received after instructing the allocated application server to process the requested service; Wherein the application server resource conversion method comprises the steps of: