Tsinghua University Information Network Engineering Research Center Application Case
Summary The campus network of Tsinghua University was built and used in 1992. The initial use was mainly for office and laboratory use. In June 1994, with the establishment of the Information Network Engineering Research Center (Network Center for short) of Tsinghua University, the campus network of Tsinghua University developed rapidly. The network center is responsible for planning and designing As the implementer of the "Golden Wisdom" project for the realization of education informatization, the Network Center manages China ’s first national academic computer interconnection network based on the TCP / IP architecture, which is the largest public welfare in the country. The Internet is also one of the largest public Internets in the country, and its user level covers the public telecommunications network and corporate network users. Therefore, the management of broadband users is extremely important. There is an urgent need for a comprehensive broadband billing system. At the same time, improve and improve services. In 2000, the network center transformed the charging system of the campus network of Tsinghua University from IP-based to user-based authentication to realize dynamic address-based charging, so that each user uses the user name as the only accounting Fee identification, no matter which network port the user connects to the Internet can achieve unified billing. While strengthening network management, it has comprehensively improved Tsinghua University's leading position in the construction of university campus networks. Tsinghua University's billing and user information uses Oracle9iRAC as a platform and uses Lenovo solutions to ensure that the data meets the requirements of the billing system in terms of security, availability, reliability, scalability, and manageability. business background Worldwide, each well-known university has attached great importance to its own network infrastructure, improved its own school-running environment, and cultivated more high-quality talents for the society. On the other hand, teaching and research methods such as prestigious school interconnection and distributed computing put forward higher requirements on bandwidth, but also higher requirements on campus network management. In the field of domestic universities, the early informatization of colleges and universities mainly focused on the infrastructure construction of multimedia network classrooms and public computer rooms. With a series of new projects and new applications such as campus network, metropolitan area network, electronic library, distance education system, e-learning training system in colleges and universities successively launched, the construction of higher education informatization in China has entered a deepened application New era. With the advent of the information age, the majority of teachers and students are increasingly dissatisfied with being able to access the Internet only in offices and laboratories, which is different from the simple teaching area groups in the past. group. The user group of college campus networks has begun to diversify, and user needs have gradually diversified. College campus networks have bid farewell to the era of free enterprise networks, and campus network construction requires new business operation ideas. Therefore, the application of advanced billing management system in Tsinghua Network Center is of great significance. The network center uses Oracle ’s advanced Oracle9iRAC technology platform as a data center to establish a “secure billing system based on user identity authenticationâ€, which is a set of users Account management, IP management, and billing management of the integrated management system. Users can "register once and then go online through account / password authentication". At the same time, the system "accounts for the identity of the account / password and calculates the network traffic according to the IP address used at that time" to complete the billing, leading the campus network construction of colleges and universities to a new level. Application requirements The campus network billing system is running at the Tsinghua University Network Center. This system is built on the Lenovo NS10000 2-node Oracle parallel database cluster system and was officially launched on February 02, 2002. With the construction of the Bauhinia Student Apartment District, more than 20,000 information points will be added to the campus network. The original database system needs to be expanded to accommodate more users. At the same time, this system is built centrally in the network center. When an unexpected situation occurs in the entire network center, the normal operation of the system cannot be guaranteed, such as the overall power failure of the network center. Therefore, in this expansion of the system, it is planned to build a second billing system in a different place (in the information center of the Bauhinia Student Apartment District). The systems at the two locations can be run simultaneously, and the performance is solved due to the increase in information points. System pressure. In addition, the newly built system and the existing billing system can also form a backup to improve the overall reliability of the billing system and ensure that the system runs normally and stably in 7 × 24 hours. In the expansion of the billing system, how to achieve that users can access data at two locations at the same time, and also to achieve data replication at two locations is the key to the design. Solution The overall structure of the charging system database design is shown in the following figure: In the picture above, Why choose ORACLE As the world's largest enterprise software supplier, Oracle's advantages in the field of database products are not only reflected in market share, but also in the full trust of important users in the Oracle database. In the "Fortune 100" enterprise application research report released by FactPoint, Oracle has undoubtedly become the first choice of "Fortune 100" enterprises. The latest generation of database products-Oracle9i database, provides unlimited scalability and overall availability, is the first database software that can run across multiple computer cluster systems, it is in clusters, high availability, data storage, security functions, systems Management and content management provide the most complete and advanced database functions. Since RAC can add one or more nodes to the cluster, the Tsinghua University Network Center can easily and quickly add nodes to the cluster according to the increase in capacity, so that the system can be expanded as needed to truly save capital investment. At the same time, RAC can dynamically optimize database resources on the cluster server, thereby providing the best performance for the integrated billing system. Why choose Lenovo Lenovo is a well-known high-tech IT company in China. Lenovo Wanquan Server has a wide range of application levels among industry users and has accumulated rich experience in implementation and deployment. At the same time, the project was strongly supported by Lenovo Application Solution Center, which was jointly invested and built by Lenovo and INTEL, and could provide transplantation, testing, optimization, model selection, training and consulting services for Tsinghua Network Center. On February 01, 2002, the first two-node cluster system was successfully deployed and put into operation by the Lenovo Application Solution Center for the Tsinghua University Network Center. Since going online, the database has been operating efficiently, stably, and reliably, without the overall failure of the cluster system, and fully guarantees the operation of the entire billing system. 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