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DB2 9 DBA exam 731 prep, Part 6: High availability: Backup and recovery

Sylvia Qi (sylviaq@ca.ibm.com), WebSphere Application Server Function Verification Tester, IBM Toronto Lab
Sylvia F. Qi works at the IBM Toronto Lab as a WebSphere Application Server function verification tester. Previously, Sylvia worked as a DB2 UDB Level 2 support engineer for six years. She has in-depth knowledge in all areas of DB2 UDB, and is an IBM certified DB2 UDB Administrator and Application Developer. Sylvia holds a bachelor of Computer Science degree from McGill University. She is an active contributing author of IBM developerWorks. Sylvia has recently co-authored the book Understanding DB2 - Learning Visually with Examples (ISBN 0131859161).
Raul Chong (rfchong@ca.ibm.com), DB2 Express Community Facilitator, IBM Toronto Lab
Raul F. Chong is a DB2 Express community facilitator at the IBM Toronto Lab. He recently assumed responsibility for building the DB2 Express community, helping members interact with one another and contributing to the forum. Raul holds a Bachelor of Science degree in Computer Science from the University of Toronto, and is a DB2 Certified Solutions Expert in both DB2 Administration and Application Development. Raul joined IBM in 1997. As a DB2 UDB consultant, Raul helped IBM business partners with migrations from other relational database management systems to DB2, and with database performance and application design issues. As a DB2 Technical support specialist, Raul helped resolve DB2 problems on the OS/390, z/OS, Linux, UNIX and Windows platforms. Raul has also worked as an information developer for the Application Development Solutions team, where he was responsible for the CLI guide and Web services material.

Summary:  This tutorial discusses database backup and recovery topics. It explains the different methods of database recovery and logging, and how to use the BACKUP, RESTORE, ROLLFORWARD, and RECOVER commands. It also covers the new DATABASE REBUILD operation. This is the first of a two-part discussion of high availability; Part 7 covers split mirroring and high-availability disaster recovery. This is the sixth in a series of seven tutorials to help you prepare for the DB2® 9 for Linux®, UNIX®, and Windows™ Database Administration (Exam 731).

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Date:  18 Jul 2006
Level:  Intermediate
PDF:  A4 and Letter (313 KB | 48 pages)Get Adobe® Reader®

Activity:  14765 views
Comments:  

Index re-creation

Rebuilding indexes

If a database crashes for some hardware or operating system reason, it is possible that some indexes may be marked as invalid during the database restart phase. The configuration parameter INDEXREC indicates when DB2 will attempt to rebuild invalid indexes.

INDEXREC is defined in both the database manager and database configuration files. There are three possible settings for this parameter:

  • SYSTEM: This value can only be specified in the database configuration file. When INDEXREC is set to this value, DB2 will look for the INDEXREC setting specified in the database manager configuration file and use this value.
  • ACCESS: Invalid indexes are rebuilt when the index is first accessed.
  • RESTART: Invalid indexes are rebuilt during a database restart.

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ArticleID=146050
TutorialTitle=DB2 9 DBA exam 731 prep, Part 6: High availability: Backup and recovery
publish-date=07182006
author1-email=sylviaq@ca.ibm.com
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