Disaster Recovery with DB2 UDB for z/OS

An IBM Redbooks publication

Note: This is publication is now archived. For reference only.

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Published on November 23, 2004

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ISBN-10: 073849092X
ISBN-13: 9780738490922
IBM Form #: SG24-6370-00


Authors: Paolo Bruni, Pierluigi Buratti, Florence Dubois, Judy Ruby-Brown, Christian Skalberg, Tsumugi Taira and Kyungsoon Um

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    Abstract

    DB2 for z/OS is the database of choice for critical data for many enterprises. It is becoming more and more important to protect this data in case of disaster and to be able to restart with a consistent copy of the DB2 data as quick as possible and with minimal losses.

    A broad range of functions can be used for the disaster recovery of DB2 subsystems. The traditional DB2 based solution consists of safe keeping and restoring image copies and logs. More general functions, applicable not only to DB2 data, but to the whole system, are hardware related, such as tape vaulting or disk volumes mirroring. Other functions are specific to DB2 such as the Tracker Site. There are also products providing replication capabilities which can be used for specific propagation requirements.

    DB2 UDB for z/OS Version 8 has introduced two new subsystem wide utilities, BACKUP and RESTORE, which, by interfacing the copy pools functions of DFSMS 1.5, are able to provide Point-In-Time recovery capabilities.

    The disaster recovery solution consists of the combination of coherent options that best fit in with the requirements, the current environment, and the investment.

    In this IBM Redbooks publication we first introduce the main concepts, and the primary components for possible solutions. We then describe the most common solutions, and implement several recovery scenarios. All our tests were implemented with DB2 UDB for z/OS Version 8. We also include criteria for choosing a solution, and recommendations based on recovery best practices.

    We focus on requirements and functions available for a disaster recovery strategy for data stored and managed by DB2 for z/OS. It is worth remembering that the non-DB2 data, logically or physically related to the DB2 applications, should be treated with equivalent and congruent solutions.

    Table of Contents

    Part 1. The whole picture

    Chapter 1. Business continuity

    Chapter 2. DB2 disaster recovery

    Part 2. Disaster recovery major components

    Chapter 3. Traditional recovery

    Chapter 4. DB2 Tracker

    Chapter 5. ESS FlashCopy

    Chapter 6. SMS copy pools and DB2 point in time recovery

    Chapter 7. Peer-to-Peer Remote Copy

    Chapter 8. eXtended Remote Copy

    Part 3. General solutions for disaster recovery

    Chapter 9. Split Mirror

    Chapter 10. FlashCopy Consistency Group

    Chapter 11. Global Copy PPRC-XD

    Chapter 12. Global Mirror PPRC

    Chapter 13. XRC: Global Mirror for z/OS

    Chapter 14. Geographically Dispersed Parallel Sysplex

    Part 4. Implementing disaster recovery scenarios

    Chapter 15. Set Log Suspend - FlashCopy - More Log - Restore System Log Only

    Chapter 16. FlashCopy Consistency Group and restart

    Chapter 17. PPRC - FlashCopy from secondary

    Chapter 18. XRC and restart

    Chapter 19. Local recovery: System PITR

    Chapter 20. Restart using tape dump of copy pools

    Part 5. Additional considerations

    Chapter 21. Data sharing

    Chapter 22. Validation and performance

    Appendix A. REXX procedures

    Appendix B. PITR definitions

    Appendix C. Additional material

     

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