Siebel Database Upgrade Guide for DB2 for z/OS > Planning a Siebel Database Upgrade >

Planning Backup and Recovery Stages

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 Siebel schema 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

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.