near-Zero Downtime Maintenance (nZDM) Technology

The Software Update Manager is equipped with downtime minimizing features, the near-Zero Downtime Maintenance (nZDM) technology. This technology allows under certain conditions a significant reduction of Business Downtime compared to current standard update and upgrade tools because more of the downtime-relevant deployment phases will be executed while the system is still available for business users.

Background Process and Tool Parameters

• Release upgrade only: Make sure that these numbers fit to the upgrade strategy and database archiving strategy used.

• Enhancement package installation and SPS update: The background processes are used for the system cloning and thus, their number influences the speed of the system cloning process. Make sure that these numbers fit to the database archiving strategy used.

Shadow Instance Parameters

There are several parameters used for running the shadow instance. Most of these parameters are set automatically, for example, an instance number not yet used in your system landscape.

SGEN Execution Mode

With transaction SGEN, you can generate ABAP loads in your SAP system. Depending on the scenario strategy, you can choose an execution strategy for the ABAP load generation: The system starts SGEN either during the uptime only, or during the uptime and after the downtime.

Memory-Optimized Activation

On 32-bit systems, the activation of ABAP Dictionary objects runs in a memory-optimized mode regardless of the chosen scenario strategy. Compared to the activation on 64-bit systems, the activation consumes less memory, but the runtime lasts longer.