Design And Implementation Of Large-Scale Mobile Email Systems

E-mail has been one the most basic and popular Internet services. As the popularity of Internet grows with each passing day , especially, with moving mass use of equipment, use mobile devices to visit Internet resources to become a kind of trend. The traditional mail system has all sorts of limitation, obvious day by day while increasing constantly in load, in addition, it is not enough to support mobile devices. To solve this problem, the author studied and developed a large-scale mobile email system. it have person who expand to be better, the portability is fine , fast, performance stabilizes and supports characteristics , such as mobile device ,etc..This thesis is about the design and implementation of a large-scale mobile accessible email system, which not only allows regular Web browser based access, also can provide WAP and SMS access to cell phone users. The thesis starts with the introduction of the basic technologies of mobile email system, mainly on WAP and SMPP protocols. And the authentication ,user authentication, load balance and storage technology. With Linux Virtual Server, this paper implements load balancebased on layer-4 switch, and has carried on the analysis of performance.Chapter four and chapter five in thesis, the thesis presents the design of a large-scale mobile email system where the author once participated as a core member. The thesis focuses on how to make a traditional mail system "mobile accessible" through functional extensions without changing main underlying architectures. The thesis has also carried on WAP mail and the function of SMS mail and expansibility test, the test result indicates that WAP mail and SMS mail module are not merely up to all functions to require, and the handling up rate is high systematically, can support very high complicated rate of people logging in in case of single server.