DSNDB* 笔记-DB2系统database

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DSNDB01: DB2 directoty database

DSNDB04: Store objects that users create without explicitly indicating the database the objects belong to

DSNDB06: DB2 catalog database

DSNDB07: Work file database but contains no permanent data, and can be deleted and redefined with the new qualifier

http://www.muraleedharan.com/mainframe_db2_catalog.html

DSNDB06:

DSNDB01:

Table space nameDescription

SCT02

Contains the internal form of SQL statementsthat are contained in an application. When you bind a plan, DB2 creates a structure in SCT02.

SPT01
Skeleton package

Contains the internal form of SQL statements thatare contained in a package.

SYSLGRNX
Log range

Tracks the opening and closing of table spaces,indexes, or partitions. By tracking this information and associatingit with relative byte addresses (RBAs) as contained in the DB2 log, DB2 can reduce recovery time by reducing theamount of log that must be scanned for a particular table space, index,or partition.

SYSUTILX
System utilities

Contains a row for every utility job that is running.The row persists until the utility is finished. If the utility terminateswithout completing, DB2 usesthe information in the row when you restart the utility.

DBD01
Database descriptor (DBD)

Contains internal information, called databasedescriptors (DBDs), about the databases that exist within the DB2 subsystem.

Each databasehas exactly one corresponding DBD that describes the database, tablespaces, tables, table check constraints, indexes, and referentialrelationships. A DBD also contains other information about accessingtables in the database. DB2 createsand updates DBDs whenever their corresponding databases are createdor updated.

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