工业监控组态软件实时历史数据库的分析与实现

Analysis and Implementation of Real-time Historical Database of Supervisory Control and Data Acquisition Configuration Software

详细分析了实时历史数据库系统的总体需求和组态软件的系统结构,设计了一种存储密度大、存储空间利用率高的存储文件结构;引用内存映射文件技术处理数据文件的读取,提高了数据文件的I/O速度;在压缩策略中,采用死区压缩和一种改进型的旋转门压缩算法,得到了很好的效果。

Based on a detailed analysis of the overall demand for the real-time database system and configuration software system architecture, a kind of storage file structure of high-density and high utilization of storage space is designed; Memory-mapped file is creatively used to deal with reading data files, so that data file I/O speed has been enhanced; Dead-zone compression strategy and an improved compression algorithm of the swinging door are used in this system to achieve good results.