Abstract: Storage area network is a storage solution based on "block" data access, it is popular in recent years and used in many areas. Online transaction processing is popular business. Online transaction processing business is running in a storage area network, to improve the quality of business. How to ensure the business can run fast and stable, or how to resolve problems in the shortest time is something that we are concerned about. This requires us to research their performance and optimize it,in order to support system running with a high quality.

Key words: Storage area network, Online transaction processing, Performance factor, Performance bottleneck, Performance optnmzation