Talk about MIS system platform
(This article is reproduced from Software Engineering Expert Network www.21cmm.com)
In recent years, with the development of computer technology and network technology, modern enterprises have encountered huge opportunities and challenges. Enterprises have begun to establish new management information systems (MIS) or revised the original management information system. In this process, the choice of MIS system platform mode is the main problem encountered by the system designer. This article tries to explore this issue in conjunction with our own practical experience. The MIS system platform mode is generally divided into four types: host terminal mode, file server mode, client / server mode (Client / Server, referms C / S) and web browser / server mode (Browser / Server, referred to as B / S ). Host terminal mode is gradually eliminated due to limited hardware selection, hardware investment is not guaranteed. The file server mode only applies to small-scale local area networks. For many users, the amount of data is large, and the network bottleneck will generate network bottlenecks, especially on the Internet. Therefore, modern enterprise MIS system platform mode should mainly consider C / S mode and B / S mode.
First, comparative analysis of C / S mode and B / S mode
The C / S mode is mainly composed of three components of the Customer Application (Client), Server Manager (Server), and Middleware. The client application is part of the user interacting with the data in the system. The server program is responsible for efficiently managing system resources, such as managing a information database, which is the optimization management of these resources when multiple customers are also requesting the same resource on the server. The middleware is responsible for joining the client application and the server management program, together with a job to meet the requirements of user query management data. The B / S mode is a new MIS system platform mode based on Web technology. Decompose the server part of the traditional C / S mode into a data server with one or more application servers (web servers), which constitutes a three-layer structure of the client server system. The first layer client is the interface of the user and the entire system. The customer's application is streamlined to a universal browser software such as Netscape Navigator, Microsoft's IE, etc. The browser translates HTML code into a graphic and touched web page. The web also has a certain interaction function that allows the user to enter information on the application form provided by the web page to the background and propose a request request. This background is the second layer of web server. The second layer web server will initiate the corresponding process to respond to this request, and dynamically generate a string HTML code, where the result of the embedding process is returned to the client's browser. If the requests submitted by the client include the data of the data, the web server also needs to work with the database server to complete this processing. The task of the third layer database server is similar to the C / S mode, which is responsible for coordinating the SQ request issued by different web servers, manages the database.
1. The advantage of the B / S mode first it simplifies the client. It does not need to install different client applications on different clients like C / S mode, and only install universal browser software. This not only saves client's hard disk space and memory, but also makes the installation process easier, and the network structure is more flexible. Suppose a business decision layer is to open a meeting to discuss inventory issues, and they only need to query data directly from the conference room, and then display it to everyone. Even attendees can also put the laptop on the web jack of the conference room to query the relevant data. Second, it simplifies the development and maintenance of the system. System developers do not need to develop different customer applications for different levels of users, just implement all functions on the web server, and set permissions for users of each group on different functions. Each user calls a different handler on the Web server through the HTTP request to complete query or modification of the data. Modern enterprises are facing a new day-changing competitive environment, and the update and adjustment of internal operation mechanisms in the enterprise have become gradually frequent. More flexibility is more flexible relative to C / S, B / S. When the situation changes, it does not need to upgrade every existing client application, and only the service handler on the web server will be revised. This not only improves the company's operational efficiency, but also saves a lot of troublesome work during maintenance. If a company has thousands of clients and is distributed in different locations, it will be more important. Again, it makes the user's operation easier. For C / S mode, the client application has its own specific specifications, and users need special training. When using B / S mode, the client is just a simple and easy to use browser software. Whether it is a decision-making layer or the personnel of the operating layer, it can be used directly without training. This characteristic of the B / S mode also makes less restriction factors maintained by the MIS system. Finally, B / S is especially suitable for online information release, making the traditional MIS functionality. This is what C / S cannot be implemented. And this new online information publishing function is especially required for modern companies. This makes the business's written documents can be replaced by electronic documents, which improves the work efficiency of the company, so that the company's administrative procedures simplifies, saves humanity. In view of the advanced nature of B / S relative to C / S, B / S gradually became a popular MIS system platform. Software companies have launched their own Internet solutions, web-based financial systems based on Web-based ERP. Some companies have already started using it, and some results have been received. The novel and popularity of the B / S mode, and the huge improvements in certain aspects, making B / S into the preferred choice for the MIS system platform, and people ignore the unripe side of B / S, and C Some advantages inherent in / s. Let us see some advantages of C / S relative to B / S.
2. The advantage of the C / S mode First, the interactive is strong is an advantage inherent in C / S. In C / S, the client has a complete application that has a powerful function in an error prompt, online help, etc., and can freely switch between subroutines. Although B / S provides a certain interaction capability by JavaScript, VBScript, it is too limited compared to a set of customers of C / S. Second, the C / S mode provides a safer access mode. Since C / S is a structural mode of a pairing point-to-point, a network protocol (for example, NTBEUI protocol) suitable for local area networks, security is adopted, and security can be guaranteed. And B / S uses a point-to-multipoint, multi-point-to-multi-point structure mode, and uses TCP / IP to use the open protocol for Internet, which can only manage passwords on the data server. Database is guaranteed. Modern companies need an open information environment that requires strengthening relationships with the outside world, and some need to develop online marketing business through the Internet, which makes most companies connect their internal network to the Internet. Due to TCP / IP, they must adopt a series of security measures, such as building a firewall to prevent Internet users from stealing the internal information of the enterprise and the intrusion of external viruses. Again, the C / S mode will reduce network traffic. B / S uses a logical three-layer structure, while physical network structures are still the original Ethernet or ring network. Thus, communication between the first layer and the second layer structure, communication between the second layer and the third layer structure needs to occupy the same network line. There is only two layers of structures, and the network traffic only includes traffic between the Client and Server. Therefore, the ability of C / S handling a lot of information is that B / S cannot match. Finally, since the C / S is less than the B / S at the Logical Structure, the speed of the C / S completed in the same task is fast than B / S. Make C / S more to handle large amounts of data. The advanced nature of the B / S mode and the maturity of C / S mode have made people selection of modern enterprise MIS system platforms. Which mode should you choose? Is there a combination of two platforms? Second, C / S mode combined with the B / S mode
