Distributed Cache In Higher Education Examination Online Registration System Application

With the popularity of Internet in the world. People began using the Internet to communicate and access to information. It is not only convenient and easy to operate, more conducive to information access and collection. So more and more government agencies, enterprises and organizations began to use websites to collect information. Such as Higher Education Admission Office of HENAN Province. Candidates login the Heao website through the Internet, can easily access their registration information and exam information. In Henan Province, the number of applicants each year nearly 1 million college entrance examination, so the Website design has become a key factor in web online registration system.The online registration Information System in Henan Province is characterized by a huge amount of information data, candidates, high traffic, which makes distributed caching technology into the system performance and scalability of key technologies. In recent years, distributed cache technology has been a hot research, many large commercial Websites such as Yahoo, Sina and so on in the study and use of distributed caching. This paper reports Henan Higher Education Admission Online system design, methods for data caching, distributed caching technology for research. Use of distributed memory object technology - Memcached, a distributed caching technology focused on solving the distributed data caching algorithms, cache replacement strategy, the cache update policy and other key issues, and implementation of a distributed caching system, the system has been applied Henan Province in 2009, Higher Education Admission Online Registration System has achieved the best results.In this paper, research results are:Higher Education Admission Online Registration System Analysis of Henan Province reported characteristics of the system, and completed the distributed cache system design and implementation. Memcached technology will be introduced to .Net development environment. The use of technology on the basis of Memcached, abandoned Memcached own data distribution algorithm - node redundancy algorithm, as well as the popular distribution algorithm Consistent Hashing algorithm, but by their own characteristics designed to meet the reporting system in Henan Higher Education Examination Online Registration System data distribution algorithm - node indexing algorithm.In the analysis of the traditional basis of updated data, the introduction of version check method to maintain data consistency, and cache data is invalid, the use of shackles to read way to solve the concurrent access issues.