S3 l4 db2 environment - databases
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DB2 architecture includes databases, the database configuration file, tablespaces, buffer pools, and log files. Databases are independent collections of objects like tables and indexes. The database configuration file defines database properties. Tablespaces are logical storage areas for tables, and the default tablespaces are SYSCATSPACE, TEMPSPACE1, and USERSPACE1. Buffer pools in memory improve query performance by caching table data and logs record all database operations for recovery.
S3 l4 db2 environment - databases
- 1. SECTION – 3 DB2 ARCHITECTURE DB2 Environment - DatabasesLecture 4
- 2. Contents Databases in DB2 Database Configuration File (db cfg) Tablespaces Buffer Pools Log Files
- 3. DB2 Environment - The Big Picture
- 4. Databases A database is a collection of information organized into interrelated objects like table spaces, tables, and indexes. Databases are closed and independent units associated to an instance. Because of this independence, objects in two or more databases can have the same name.
- 5. DB configuration file (db cfg) Database Configuration (get db cfg)
- 6. Tablespaces Table spaces are logical objects used as a layer between logical tables and physical containers. Three Default Tablespaces: SYSCATSPACE TEMPSPACE1 USERSPACE1
- 7. Buffer Pools A buffer pool is an area in memory which is used to improve the performance of queries. Buffer pools are one of the most important objects to tune for database performance. Default buffer pool for databases : IBMDEFAULTBP
- 8. Log Files Logs are used by DB2 to record every operation against a database.
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- 10. Thank You !