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Overview
This course provides attendees with a comprehensive introduction to the recovery of Db2 objects. The course examines all the provided Db2 utilities and service aids, and discusses their involvement in recovery scenarios involving user data and Db2 data such as the catalog and directory.<br><br>This course is also available for one-company, on-site presentations and for live presentation over the Internet, via the Virtual Classroom Environment service.Prerequisites
While in-depth knowledge of Db2 is not required, a basic understanding of relational databases is assumed. Familiarity with TSO/ISPF and JCL is also required.Delegates will learn how to
- describe the structure and format of Db2 pagesets
- list all of the major recovery components
- describe the need for Db2 logging to assist in recovery situations
- describe the need for and use of all Db2 utilities
- identify when service aids may be required for use in recovery situations
- describe the additional considerations when recovering catalog and directory tablespaces.
Outline
Db2 Physical Data StorageVSAM file requirements; Creating VSAM files; Page sets; Page set structure; Index structure; Index keys & pointers; Data navigation; RIDS, pointers, and holes; Table row header format; Large Object data; Large Object columns; XML data; XML storage structure names.
Db2 LoggingDb2 logging; Unit Of Recovery; Two phase commit; Logging parameters - size & number of logs; logging parameters - checkpoints; Checkpoint records; Forcing an archive log.
Introduction to Db2 UtilitiesDb2 utilities; Db2 utility packaging; Invoking online utilities - Db2i defaults panel; Invoking online utilities - Db2 utilities panel; Invoking online utilities - dataset names panel; Invoking online utilities - control statements panel; Control statements; LISTDEF control statement; Use of Wild Cards with LISTDEF; TEMPLATE control.
Utilities for Data IntegrityCHECK DATA utility; CHECK INDEX utility; CHECK LOB utility; REPAIR utility.
Utilities for Backup & RecoveryBackup & recovery components; COPY utility; COPY list of objects; COPY using LISTDEF and TEMPLATE; COPYTOCOPY utility; MERGECOPY utility; QUIESCE utility; RECOVER utility; RECOVER list of objects; Recovery involving referential integrity; Recovery and large objects: recover either to current point, recover either to prior point, recover both to prior point; Resetting status codes; XML data recovery; REBUILD INDEX utility; REPORT utility; MODIFY utility; BACKUP SYSTEM utility; RESTORE SYSTEM utility; Restoring to a specified point.
Other Online UtilitiesLOAD utility; REORG TABLESPACE utility; Using shadow copies during REORG; REORG utility - BUILD2 phase; Shadow copies - FASTSWITCH; RUNSTATS utility; STOSPACE utility; UNLOAD utility.
Stand-Alone Utilities (service aids)Invoking stand-alone utilities; DSN1COPY stand-alone utility; DSN1PRNT stand-alone utility; DSNJU004 (print log map) stand-alone utility; DSNJU003 (change log inventory) stand-alone utility; DSN1LOGP stand-alone utility; DSN1CHKR stand-alone utility; DSN1COMP stand-alone utility; DSNJLOGF stand-alone utility; DSNJCNVB stand-alone utility.
Catalog & Directory RecoveryCatalog / Directory recovery implications; Recovery sequence; Catalog & Directory point-in-time recovery; Recovery implications - DEFINE option; Recovery implications - FASTSWITCH; Recovery implications - identity columns & sequences; System-wide points of consistency.