SAP R/3 Instances and Clients
SAP R/3 实例与实集
An SAP R/3 implementation is usually performed with more than one R/3 “system.” As with any software and database, the environments where configuration is performed and where new programs are written and tested should not be the same environment where the system is used on a day-to-day basis. SAP accommodates the need for these separate environments with instances and clients.
An instance is typically named for the type of environment it supports, it often has a three-character name, and its data is contained in a separate database from other instances. An instance named DEV, for example, would indicate that development work would be performed on this instance. An instance named PRD, for another example, would indicate that this instance is used for “production,” or day-to-day use, and programming, configuration, and testing sh