基于数据库集群的高可用性省级数字林业系统

Highly-usable and Provincial-level Digital Forestry System Based on Database Cluster

依托O racle l0g RAC基础网格服务,分析湖南省数字林业系统现状,研究利用高可用性数据库集群技术(DCT)构建省级数字林业系统模型,并分析其工作原理和实现技术.通过性能测试,与同等硬件条件构建的系统比较,使用O racle 10g RAC构建数据库集群系统在性价比上成倍提高,可靠性提高70%以上,硬件购买及设备运行维护约占小型机系统的2/3至3/4,同时具有良好的通用性、移植性和可扩展性,可以满足大规模OLTP应用的需要,能更好地为市、县林业部门信息处理提供服务器平台.

Relying on the basis of grid services of Oracle 10 g RAC and analyzing the digital forestry status of Hunan Province, this paper makes a study of a highly-usable database clustering technique （DCT） by creating a provincial forestry system model and analyzing its working principle and technology. Through a performance testing, comparing the hardware system under the same conditions, this database cluster system of Oracle 10 g RAC has doubly increased its cost performance, improved its reliability of more than 70 percent, and reduced its costs of hardware purchase, equipment operation and maintenance to 2/3～3/4 of those of small computer systems, with good versatility, portability and scalability. To meet the needs of large-scale OLTP application, the system provides better information processing server platforms both for city and county forestry departments.