The researching and application of historical data processing in real-time database system

Real-Time Database is the result of the integration of traditional database technologies and real-time systems, and it's the core of the supervisory information system (SIS). It acts as an essential role in industrial fields and thus is very significant and valuable to research and practice. Historical data is regularly sampled from real-time database system and stored in history database. The user can access data from history database if necessary. Preservation of the historical data is a very important function of real-time database system. Historical data processing concerns the integrity of real-time database system. And the design of real-time database influences system performance. The historical data process in Real-Time Database is introduced in detail, and the implement action of disk history database is described.