Upgrade Guide for DB2 UDB for z/OS > How the Upgrade Works >
About Using Siebel Expert Services
The Siebel 7.8 upgrade process on DB2 for z/OS is designed to run in all standard Siebel implementations. It is built on the assumption that data exists in all Siebel tables and that all this data needs to be migrated.
In reality, your implementation has probably been customized to suit your business so, for example, you might not use all of the Siebel tables shipped or they might contain varying amounts of data. To accommodate this fact, the upgrade process is customizable, for example, you can eliminate upgrade jobs that run on empty tables, or you can choose to run unload jobs simultaneously.
Siebel Technical Support provides support for all standard z/OS upgrades but it does not support customized upgrades. Customizing the 7.8 upgrade scripts is a complex process and, for this reason, if you want to customize the upgrade scripts, you must contact Siebel Expert Services for assistance and approval of the changes.
This guide describes a number of upgrade customization tasks that you can perform where the assistance of Siebel Expert Services is required.
CAUTION: You must contact Siebel Expert Services before performing tasks where such help is noted as a requirement. If you do not, you may invalidate your support agreement.
This guide also describes tasks where enlisting the help of Siebel Expert Services is recommended. Failure to contact Siebel Expert Services for help with these tasks does not have implications for continuing Siebel support.
Where a task requires the help of Siebel Expert Services, this is indicated in the relevant topic.