Determining When Recovery is Needed


Database recovery is normally performed only when there has been a failure of some sort. Most of the time recovery is done as a result of a system, hardware, or application failure. However, you can also use recovery procedures to return a database to a previous point in time, and to recover from application logic failures.

In general, a database might need to be recovered under the following circumstances:

  • A DB batch update job fails after making at least one database update.

  • A failure occurs on a physical DASD device.

  • A failure occurs in a database recovery utility.

  • A failure of a dynamic backout or a run of the Batch Backout utility (DFSBBO00) has occurred.

  • An IMS online system failure and emergency restart has not been completed.



Introduction to IMS. Your Complete Guide to IBM's Information Management System
An Introduction to IMS: Your Complete Guide to IBMs Information Management System
ISBN: 0131856715
EAN: 2147483647
Year: 2003
Pages: 226

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