Because of the different approaches taken to priority scheduling in SLES 10 and SLES 11, and the related workload conversion that must occur, the SLES 10 TDWM database must be backed up before upgrading the operating system. In an in-place upgrade scenario, this measure ensures ongoing access to workload-management configurations and functionality should you need to revert to the SLES 10 environment. In a migration scenario, the backup is restored on the destination system in preparation for the required workload conversion.
Depending on your baseline and target operating environments, database upgrade and additional database backup may be required as part of transitioning to SLES 11. If so, be sure to review Teradata Database Node Software Upgrade Guide: Overview and Preparation and, if migrating between hardware to upgrade the operating system, Teradata Database Node Software Migration Guide for the applicable database version.