The HA Improvement of Historical Database in Upper Machine
Zhang Huab · Huagong zidonghua ji yibiao · 2007
To solve the problem of low security with single history database and the maximum data quantity less than 2G in HMI software of upper machine,one substitutable project was discussed.The project which was low cost adopts PostgreSQL as history database.The history database dual PC real time hot backup based on Slony-I was realized on the cluster which consists of two common PC.This High-Availability(HA)cluster configuration project improves the security of history database.