The Silent Data Migration Infrastructure (SDMI) is a framework that enables automatic application data migration during system uptime.

The migration of application data usually takes place in the course of release upgrades or updates during downtime. However, the SDMI also supports update or upgrade procedures with zero downtime option, so that silent data migrations can run in parallel to regular productive business operations after the procedure.

Before you start an update or upgrade procedure with zero downtime option, make sure that all relevant silent data migration classes have been executed successfully. With transaction SDM_MON, you can display all relevant classes for silent data migration across all clients in the system. If any unfinished silent data migration classes exist, the Software Update Manager stops with an error in phase PREP_GENCHECKS/RUN_SDM_CHECK_STARTRELEASE.

The procedure can only be continued if all relevant classes for silent data migration are completed.