Regarding relies on highly network today, the data security and the usability and develops very important to Telecommunication Carrier's survival. Each kind of natural disaster and the thunderbolt have the possibility to cause the business data to lose, from this creates the system paralysis. The data missing looks like inevitably in the Telecommunication Carrier. Consequently, it is crucial to build an information system of high availability and strong ability of disaster tolerance for the Telecommunication Carrier those who hope to survive and achieve success in today's rapidly changing economic environment. On this subject, this thesis researchs the sustainability disaster recover and critical business, analysies the sort and characteristic of disaster recover system and the factor and target of disaster recover system's design. In conclusion, this thesis provides high availability solutions of low cost but high flexibility for information systems to improve high availability and ability of data disaster tolerance of Telecommunication Carrier's information system. |