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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:  

Summary

So that's the story on high availability backup and recovery. In this tutorial you learned:

  • Recovery concepts and the importance of having a recovery plan.
  • What a transaction (unit of work) is and how working with transactions ensures data integrity.
  • The three types of recovery: crash, version, and rollforward.

You are now familiar with DB2 transaction logs concepts:

  • The log buffer
  • Primary and secondary logs
  • Active, online archive, and offline archive logs
  • Database configuration parameters: LOGPRIMARY, LOGSECOND, and LOGFILSIZ, among others
  • The two types of logging: circular logging and archival logging (for which LOGARCHMETH1 database configuration parameters must be enabled)
  • Infinite logging
  • Recoverable and. non-recoverable databases

You learned about database and tablespace backup concepts:

  • How to use the backup utility
  • Incremental and delta backups
  • How to invoke the BACKUP utility from the Control Center
  • The naming convention used for backup files

You learned about database and tablespace recovery concepts:

  • How to use the RESTORE utility
  • Minimum point in time
  • How to invoke the RESTORE utility from the Control Center
  • What the QUIESCE utility can do for you
  • What the history file contains
  • How to perform a redirected restore

You learned about database and tablespace rollforward concepts:

  • How to use the ROLLFORWARD utility
  • How to restore to a point in time using the ROLLFORWARD utility
  • How to invoke the ROLLFORWARD utility from the Control Center
  • How to use the RECOVER utility
  • How to rebuild a database using the RESTORE utility
  • Index re-creation and the INDEXREC configuration parameter

Part 7 continues with high availability, and discusses split mirroring and high-availability disaster recovery.

To keep an eye on this series, bookmark the page, DB2 9 DBA exam 731 prep tutorials.

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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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