A domestic electric power group, which is established when national electric power system reformed at the end of 2002, is one of the five national wholly state-owned power generation corporations. It is a huge-scale central government-owned company supervised by the State-owned Assets Supervision and Administration Commission of the State Council. It mainly engages in power production, heat production and supply, as well as electric power related primary energy industry, such as coal, andits related technical supportand service. In company development process, high reliability construction of information system is the important content in informatization construction. It is an important step to improve working efficiency, to help winning the battle of improving quality and efficiency, and to build reliable office information platform for world-class energy group.

In company information system construction, Huadian always builds HA active/standby system with physical servers. With the development of virtualization technology in recent years, it's been proved that the integration between virtualization technology and physical server increases the resource utilization rate of physical server,and realizes the fast deployment, seamless migration, and it greatly simplifies the management. Huadian information management system can be migrated gradually from physical server to virtual platform. In this migration process, the high availability construction of system and challenges in smooth migration should be especially concerned.

Client environment

● OS: Win08R2, RHEL5/6

● Front-end application: ERP system, OA system, File system

● Back-end database: Oracle, DB2

● The migrated virtual platform: VMWare

Existing problems

● The original system does not support virtual platform

● The original system authorization method does not fit with virtual environment

● The original system has low switchingefficiency.

● Theconfiguration,management and maintenance of original system are complicated.

New requirements: Migrate application system to virtual platform