KR20020089945A - Network System with Web Accelerator and Operating Method for the Same - Google Patents

Abstract

PURPOSE: A network system having a web accelerator and an operation method thereof are provided to increase a response speed of a server and to guarantee the better quality of a service by increasing the performance of the server and reducing the traffics with the use of the web accelerator. CONSTITUTION: The network system comprises a plurality of clients, a plurality of servers and the web accelerator. If the client requests the information to a server, the web accelerator transfers the request to the servers and caches the information provided by the server. If the same information is requested again, the web prevents the server load by providing the cached information to the client. The web accelerator comprises the first network connector(11) communicating the data with a router(1), the second network connector(12) communicating the data of the client with the server, a memory(13) storing the information provided by the server through the second network connector, and a controller(14) storing the information of the server in the memory and transferring the client request to the servers.

Description

Network system with web accelerator and operating method thereof {Network System with Web Accelerator and Operating Method for the Same}

The present invention relates to a network system having a web accelerator and a method of operating the same. Particularly, when a client connected to a server through a network requests a server to provide information to the server, it prevents the load of the server and the traffic amount of the entire network. The present invention relates to a network system having a web accelerator capable of reducing the number and a method of operating the same.

A client / server represents a role relationship between two computer programs. Clients are programs that request services from other programs, and servers are programs that respond to those requests. The client / server concept can be applied within a single computer, but has a greater meaning in network environments.

The client / server model on the network provides a convenient means of connecting programs that are distributed across different regions. In particular, the client / server model is a key concept in network computing. In other words, most of the business programs that are being created today employ a client / server model, as are TCP / IP, the main program on the Internet. In the case of the Internet, for example, a web browser is a client program that requests a web server located somewhere on the Internet to transfer a web page or file.

Often, a network system refers to a client consisting of a plurality of PCs or the like that perform a role according to the client / server model, a server built on the web to provide information to the client, and the client and the server may transmit data. It refers to a system formed in a network including a connecting means for connecting the client and the server to transmit and receive.

1 shows the configuration of the network system described above. That is, when the plurality of clients A1 to An transmitting and receiving necessary information through the network I1 and the clients A1 to An request to access and provide information to the servers B1 to Bn, Router 1 for setting the path in the network of the information provided by the server, and the load balancer for preventing the load of the server by distributing the requests of the client (A1 ~ An) requested through the router (1) (Load Balancer) 2, transaction management means (3) for managing a transaction (Transaction) generated in the process of the client (A1 ~ An) transmits and receives information with the server (B1 ~ Bn), and the client ( First and second switches 4a and 4b for selecting a path or a line for data to be correctly transmitted and received between A1 to An and the servers B1 to Bn, and for the requests of the clients A1 to An. It stores the result so that if the same request is repeated It is composed of a cache server (5) for providing the cached data to the client.

FIG. 2 illustrates a flow of data generated by the client in order to receive information from the server in a conventional network system configured as described above.

First, in the first step, the client performs a three-way handshake with the server to send and receive data three times as a connection request is made to connect to the server. (S1) After the 3-way handshake of the first step is performed, in step 2, the client requests information provision to the server (S2), and in step 3, the server provides the requested information to the client. (S3).

In the fourth step, the client informs that the server has received the information provided by the server, and accordingly, the server also performs a 4-way handshake to inform the client that it has received an information response.

In step 5, the client requesting to provide information to the server makes a connection request to the server through a 3-way handshake again (S5). As the connection is made, the client requests information provision in step 6 (S6). In step 7, the server receives the information (S7).

Here, L2 / L3 / L4 / L7 switches may be used as the first and second switches 4a and 4b. In particular, the L3 switch, which is an IP switch, supports an IP routing function, and the L4 switch supports a load of a server. For balancing and firewalling, the L7 switch supports content-based load balancing. However, the switches supporting the load balancing function as described above have a problem that they need to have many servers for processing the requests of many clients to operate efficiently. In addition, the load balancing function supported by the conventional L4 switch is a load balancing function for connecting a session between a client and a server. When multiple requests occur in one session of the client, the load balancing for each request cannot be performed. have.

In addition, the server (B1 ~ Bn) in the prior art to build a network infrastructure with the cache server 5 using the L4 / L7 switch in order to handle the request of a large number of clients or to improve the response time using a data compressor method The compressed data is transmitted to the clients A1 to An. However, there is a problem that the compressor method does not have a great effect in the case of a picture file.

Finally, the cache server 5 is configured in accordance with the purpose, but when installed on the client (A1 ~ An) side improves the unpredictable response time of the client and reduces the load on the server. That is, since the cached data is transmitted to the client, the servers B1 to Bn guarantee the Quality of Service (QoS) to the clients A1 to An and reduce the bandwidth when transmitting and receiving data. Server down due to excessive requests).

However, if the system is configured using a plurality of switches, transaction management means, and a cache server as described above, there is a problem in that the system configuration requires specialized knowledge and costs a lot. In addition, there is a problem that the wire speed is reduced as more devices pass through during data transmission and reception.

The present invention has been made to solve the above problems of the prior art, the purpose of which is to provide a load balancing function, cache function, data compression function based on the session management technology of the client and server to remove the inefficiency of the existing switch Provides a network system and a method of operating the web accelerator which can improve the server side performance by using the supported web accelerator and reduce the amount of traffic and ultimately increase the response speed of the server and guarantee better QoS. It is.

1 is a diagram showing the configuration of a conventional network system;

2 is a diagram illustrating an operation method of a conventional network system.

3 is a diagram showing the configuration of a network system having a web accelerator according to the present invention;

4 is a diagram showing the configuration of the web accelerator of FIG.

5 is a flow diagram illustrating a first operation method of a network system having a web accelerator according to the present invention;

6 is a flow diagram illustrating a second operation method of a network system having a web accelerator according to the present invention;

7 is a graph showing the resource utilization rate of the server in the network system having a web accelerator according to the present invention.

<Explanation of symbols on main parts of the drawings>

A1 ~ An: Client B1 ~ Bn: Server

1: Router 10: Web Accelerator

11,12: first, second network connection means

13 memory unit 14 control unit

According to a feature of a network system having a web accelerator according to the present invention for solving the above problems, a plurality of clients connected to a network network and transmitting and receiving data as needed through the network network, the client is the network network In the network system comprising a plurality of servers that provide the information requested by the client when connected via the server, when the client requests to provide information to the server, the request is transmitted to the plurality of servers and the information provided by the server The cache is configured to include a web accelerator which prevents the load of the server by providing the cached information to the client requesting the information when the information is requested to the server again.

In addition, according to a first aspect of a method for operating a network system having a web accelerator according to the present invention, in a network system built on a network, the client may access and provide information to the server in order to receive the information from the server. According to the first step of the request, the second step of the connection and information providing request of the client made in the first step is distributed to a plurality of servers, and the connection and information providing request delivered in the second step And a fourth step of compressing the information provided by the server and a fourth step of transmitting the information compressed in the third step to the client.

In addition, according to a second aspect of the method for operating a network system having a web accelerator according to the present invention, in a network system built on a network, maintaining a connection between the server and the server by managing TCP sessions of the client and the server. A first step of establishing a web accelerator for processing a server between the server and the router; a second step of connecting the client to the server through the web accelerator built in the first step; and in the second step, A third step of the client requesting to provide the information to the server as the client is connected to the server, and the server is connected through the web accelerator established in the first step according to the information providing request of the third step The client requests information to the client without receiving the information reception response from the maintained client. The fourth step is to provide continuously.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 3, a network system having a web accelerator according to an embodiment of the present invention includes a plurality of clients A1 to An that transmit and receive information required through a network I1, and the clients A1 to An. Requests to connect to the servers B1 to Bn and provide information, the router 1 for setting a path in the network of the request and the information provided by the server, and the request for connection and information provision of the clients A1 to An. Is distributed to the plurality of clients B1 to Bn, and the web accelerator 10 compresses the information provided from the clients B1 to Bn and delivers the information to the clients A1 to An.

Here, as shown in FIG. 2, the web accelerator 10 is configured to set a path so that the clients A1 to An are connected to the servers B1 to Bn through the network I1. A first network connection means 11 for transmitting and receiving data to and from a second network for transmitting and receiving data of the clients A1 to An transmitted and received through the first network connection means 1 with the servers B1 to Bn. A memory unit 13 for storing network connection means 12, information provided by the servers B1 to Bn transmitted and received through the second network connection means 12, and the server as the memory unit 13; Requests of clients A1 to An transmitted through the first network connection means 11 while storing the information of B1 to Bn are transmitted to the plurality of servers B1 to B1 through the second network connection means 12. Control unit 14 for controlling the transfer to Bn).

In addition, the control unit 14 is a TCP session of the server (B1 ~ Bn) and the client (A1 ~ An) connected through the first network connection means 11 and the second network connection means 12. ), Instead of maintaining the connection of the servers B1 to Bn, and compressing the information provided by the servers A1 to An to the client B1 to Bn through the first network connection means 11. To pass.

In addition, the control unit 14 stores the compressed information in the memory unit 13 and provides the information stored in the memory unit 13 to a client requesting information stored in the memory unit 13. In particular, information of a picture file format among the information provided by the servers B1 to Bn is compressed by adjusting the resolution of the picture file so that the user does not notice.

The web accelerator 10 configured as described above thus manages a TCP session, which is a web session of the clients A1 to An and the servers B1 to Bn, and manages the clients A1 to An and the servers B1 to Bn. By relaying the TCP / IP flow in the middle, the load of the servers B1 to Bn can be reduced and the clients B1 to Bn can be responded at a higher speed.

In particular, the web accelerator 10 improves the transmission speed of the servers B1 to Bn by performing a net buffering function between the clients A1 to An and the servers B1 to Bn. By processing the maintenance instead, more information and services are provided to the clients A1 to An.

In addition, according to the information compression of the web accelerator 10, the amount of data transmission between the web accelerator 10 and the client (A1 ~ An) is reduced, the control unit 14 of the web accelerator 10 is almost felt by users By compressing the information of the picture file format in real time in the kernel of the operating system by adjusting the resolution with the force information, the data amount of the information cached in the memory unit 13 is reduced and the data transfer amount is also reduced. .

Lastly, the web accelerator 10 according to the present invention performs load balancing based on a request of a web page when there are a plurality of servers providing the same service to the server connection and information provision request of the clients A1 to An. To perform. Therefore, it manages transactions more precisely than conventional session-based load balancing and performs load balancing functions efficiently. In other words, the conventional load balancing allows the client to connect to the selected server when the client makes a request for the web page to bring data through the server to which the client is connected. However, when the web accelerator 10 of the present invention makes a request for a web page as a client requests access to the server and provides information, the requests are distributed to a plurality of different servers based on web session management technology in the middle. And efficient load balancing to provide information to the client from the plurality of servers.

When the client requests to connect to the server and provide information, the web accelerator 10 maintains the connection between the client and the server through web session management between the client and the server. In addition, when the information requested by the client is stored in the memory unit 10, the web accelerator 10 transmits the information stored in the memory unit 10 to the client. After receiving and compressing data from an accessible server among two servers, transmitting the compressed data to the client, and storing the transmitted information in the memory unit 10, the memory unit is requested when the client requests the information according to the data again. The information in (10) is provided to the client.

The operation method of the network system having the web accelerator of the present invention configured as described above will be described with reference to FIG.

First, in step 11, the client requests access and information to the server through the web accelerator in order to receive information from the server. (S11)

In a twelfth step, the connection and information providing request of the client is distributed and delivered to a plurality of servers accessible through the web accelerator. (S12)

In step 13, the web accelerator compresses the provision information as the server provides the information according to the access and the information provision request transmitted through the web accelerator. Here, the web accelerator compresses the information of the picture file format among the information provided by the server by adjusting the resolution.

In step 14, the compressed information is delivered to the client. (S14)

In addition, according to the operating method of the network system, in the thirteenth step, when the compressed information is stored, the compressed information storing step; and in the eleventh step, when the client requests the same information as the information stored in the compressed information storing step. And providing compressed information provided by the stored information to the client.

6 illustrates how information between the client and the server is transferred through the web accelerator in a network system having a web accelerator of the present invention.

First, in step 21, the client requests a connection to a server from the web accelerator. (S21)

In a twenty-second step, the web accelerator performs a connection between the client and the server as requested. (S22)

In a twenty-third step, the client connected to the server requests the first accelerator to provide the first information to the web accelerator. (S23)

As requested in the twenty-third step, in the twenty-fourth step, the web accelerator delivers the first information provision request to the server. (S24)

In step 25, the server provides information to the client through the web accelerator according to the request transmitted in step 24. (S25)

In step 26, the client, which has received the first information, sends the corresponding information reception response to the web accelerator in step 26. (S26)

In step 26, the client, which has received the first information reception response, requests the web accelerator to access the server in step 27 again. (S27)

In step 28, the client requesting access to the server requests to provide second information through the web accelerator in step 28. (S28)

In step 28, as the client requests to provide the second information, in step 29, the web accelerator delivers the second information provision request to the server where the connection is maintained through the TCP session management. (S29)

In step 30, the server continuously provides the second information to the client through the web accelerator in accordance with the first information providing step. (S30)

The client receiving the second information in step 30 makes a second information reception response to the web accelerator in step 31. (S31)

That is, according to the operation method of the network system having a web accelerator according to the present invention as shown in FIG. 6, the 4-way handshake process performed by the server in the conventional network system and the 3-way handshake performed when the connection request is performed again. The process is omitted. Thus, the server uses the resources to send data to the client only to provide information.

7 is a graph illustrating resource utilization rates of a server operating in a conventional network system and resource utilization rates of a server in a network system according to the present invention. As shown in FIG. 7, a server operating in a network system of the present invention using a web accelerator uses much lower resources than a conventional server for maintaining TCP / IP connection, and thus provides services and information to a client as a web server. More resources are used.

Table 1 shows a comparison of the speed and performance of the conventional network system and the network system having the web accelerator of the present invention.

Count Conventional network system Network system with web accelerator Request per Second Throughput Request per Second Throughput One 93.620 60,3150.063 208.680 1,308,279.375 2 187.240 1,189,996.750 455.750 2,794,855.750 3 292.190 1,846,349.875 701.680 4,348,899.750 4 388.670 2,395,979.063 946.820 5,881,853.250

Where 'Request per Second' in the above table means request that occurred every second? 'Throughput' represents the amount of data actually transmitted per second (Byte / Sec).

As shown in Table 1, the network system having the web accelerator according to the present invention has about 4 times the speed and performance of the conventional network system. Accordingly, the response speed and the service providing speed of the server through the network also increase. do.

A network system having a web accelerator according to the present invention and a method of operating the same have a net buffering function, a caching function, and a request based on a web session management technology to a switch used in a conventional client / server network system. By using the web accelerator that combines the load balancing function and the information compression function that are based on it, it is possible to easily build the network infrastructure even for the non-technical users. It can reduce the cost and the cost of the maintenance, and the response speed is faster by using the resources efficiently by the server for the client's request, and the server's load can be prevented when the client's request is congested. The server uses much less resources to maintain TCP / IP. It improves the speed of the web has the effect that you can get more users.

Claims (13)

A plurality of clients connected to a network and transmitting and receiving data as needed through the network; In the network system comprising a plurality of servers for providing the information requested by the client when the client is connected through the network, When the client requests the information to the server, the request is delivered to a plurality of servers, and the information provided by the server is cached so that the cached information is requested when the information is requested to the server again. And a web accelerator for providing the information to the requesting client to prevent the load on the server. The method of claim 1, The web accelerator includes first network connection means for transmitting and receiving data to and from a router for setting a path such that the client is connected to the server through the network; Second network connection means for transmitting and receiving data of the client transmitted and received through the first network connection means with the server; A memory unit configured to store provision information of the server transmitted and received through the second network connection unit; And a controller for storing the server information in the memory unit and controlling a request of a client transmitted through the first network connection means to be transmitted to a plurality of servers through the second network connection means. Network system having a web accelerator. The method of claim 2, The control unit is configured to manage the TCP session (Session) of the server and the client connected via the first network connection means and the second network connection means to handle the connection maintenance of the server instead. Network system with. The method of claim 2, The control unit is configured to compress the information provided by the server and to deliver to the client via the first network connection means, the network system having a web accelerator. The method of claim 4, wherein And the control unit is configured to store the compressed information in the memory unit and provide the information stored in the memory unit to a client requesting the information stored in the memory unit. The method of claim 5, The control unit is a network system having a web accelerator, characterized in that the information of the picture file format of the information provided by the server is configured to compress by adjusting the resolution of the picture file. A plurality of clients connected to a network and transmitting and receiving data as needed through the network; In the network system comprising a plurality of servers for providing the information requested by the client when the client is connected through the network, A first step of the client requesting access to the server and provision of information to receive information from the server; A second step of distributing the connection and information providing request of the client made in the first step to a plurality of servers; A third step of compressing information provided by the server according to the access and information providing request transmitted in the second step; And a fourth step of transmitting the information compressed in the third step to the client. The method of claim 7, wherein In the second step, the connection and information provision request is transmitted to a server accessible to a plurality of servers providing information requested by the client, the operation method of the network system having a web accelerator. The method of claim 7, wherein Method of operation of a network system having a web accelerator, characterized in that the information in the picture file format of the information provided by the server in the third step is compressed by adjusting the resolution. The method of claim 7, wherein The operating method of the network system having the web accelerator further includes a compressed information storing step of storing the compressed information in the third step. The method of claim 10, The method of operating a network system having the web accelerator further includes a step of providing compressed information provided by the stored information to the client when the client requests the same information as the information stored in the compressed information storing step in the first step. Method of operation of a network system having a web accelerator, characterized in that made. A plurality of clients connected to a network and transmitting and receiving data as needed through the network; In the network system comprising a plurality of servers for providing the information requested by the client when the client is connected through the network, A first step of establishing a web accelerator between the server and the router for managing the TCP session of the client and the server to handle connection maintenance of the server; A second step of connecting the client with the server through the web accelerator built in the first step; A third step of requesting provision of information to the server as the client is connected to the server in the second step; Continuously providing the information requested by the client to the client according to the information providing request of the third step even if the server does not receive an information reception response from the client maintained through the web accelerator established in the first step. A method for operating a network system having a web accelerator comprising the fourth step. The method of claim 12, The second step may include: a first connection requesting step of requesting the client to access the server with the web accelerator; The web accelerator comprises a connection performing step of connecting the client and the server as requested in the first connection request step, The third step includes a first information providing request step of requesting the first information provision to the web accelerator by the client connected to the server through the connection performing step; A first information request delivery step of delivering the first information provision request to the server as requested by the first information provision request step; The fourth step includes a first information providing step of providing information to the client through the web accelerator in response to a request transmitted through the first information request delivery step; A first information reception response step of the client having received the first information through the first information providing step, thereby causing the web accelerator to respond accordingly; A second connection request step of requesting, by the web accelerator, a connection to the server from the client which has received the first information reception response in the first information reception response step; A second information provision request step of requesting the second information provision through the web accelerator by the client requesting access to the server through the second access request step; A second information request delivery step of delivering the second information provision request to the server maintained by the web accelerator through the TCP session management as the client requests the second information provision through the second information provision request step; Wow; A second information providing step of continuously providing second information after the server provides the first information to the client through the web accelerator according to the second information request delivery step; And a second information receiving response step of the client receiving the second information through the second information providing step to give a second information receiving response to the web accelerator. Way.