Upgrade Guide for DB2 UDB for z/OS and OS/390 > Database and UI Upgrade Planning > Planning Your Upgrade >

Planning Backup and Recovery Stages

You may need to recover all Siebel DB2 objects to a prior point in time. Your usual point-in-time recovery techniques may be insufficient in this environment.

In addition to the backup and recovery procedures that are standard for your environment, take a set of DB2 backups at key stages during the upgrade, using your preferred utility. A snapshot of your repositories and environment at these stages protects the progress of your upgrade in the event of a failed subsequent process.

It is recommended that you back up your repository at these key stages of the upgrade:

• Before any upgrade activity is started
• Before performing unloads

  NOTE:  Unloads must be performed when there is no system activity, so that the database is at a point of consistency.

• After upgrading the Siebel Database schema
• After the repository merge
• After upgrading the custom database schema

NOTE:  Review the results of all JCL jobs that you execute during the install or upgrade process. You can use a spool viewer such as IBM's SDSF to inspect the output from these jobs. You can review this information in addition to reviewing the upgrade log files.