这些应用程序在本地调用db2库，并且由DB 2 catalog提供对主机数据库的访问。
The applications call the DB2 libraries locally, and the DB2 catalog provides access to the host databases.
在很多情况下，后端数据库实际上是大型主机数据库，例如IBM基于大型主机的分层dbms IMS。
In many cases, the back-end database is actually a mainframe database such as IMS, IBM's mainframe - based hierarchical DBMS.
事件信息，如主机名、数据库、事件类型、消息ID和项目类型。
Event information, such as host name, database, event type, message ID, and item type.
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