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Information Management System. Composed of two systems: a
Database Manager (IMS DB) and a Transaction Manager (IMS TM).
IMS DB:
Information Management System Database Manager.
IBM’s venerable (introduced in 1968) large system hierarchical DBMS. In
casual conversation, either IMS1 DB or IMS TM may be referred to simply as IMS
without anyone complaining. Following the introduction of DB2, it was assumed,
both inside and outside IBM, that IMS DB would die a slow death as DB2’s
performance improved to approach that of IMS DB. But, it never happened, mainly
because of the number of major IMS-based applications at large organizations
worldwide. Once IBM realized this, a major effort was made to keep both IMS DB
and IMS TM up to date with the latest trends, such as Web enablement, though
nobody proposed making it into a relational DBMS. |