Updating SAP ABAP Systems on UNIX and Linux: SAP MaxDB

Switch to Standalone Enqueue Server 2

As of target release ABAP platform 1809, the Software Update Manager changes the ASCS setting to Standalone Enqueue Server 2 and Enqueue Replicator 2.

With the new standalone enqueue server 2, which is offered as of SAP NetWeaver AS ABAP 7.51, the scalability has been further improved. As of SAP NetWeaver AS ABAP 7.52, the high availability architecture has been simplified and the new enqueue replicator 2 has been introduced, which provides an improved failover process. For more information about these features, see the blog High Availability with Standalone Enqueue Server 2Information published on SAP site in the SAP Community .

See also SAP Note 2630416 Information published on SAP site regarding the support for Standalone Enqueue Server 2, and the SAP Help Portal with information about Switching to the Standalone Enqueue Server 2.

During the update procedure, the Software Update Manager:

  • Applies the new SAP Kernel.

  • Performs the required SAP profile changes.

  • Deletes the old enque/* parameters except for the mandatory parameter enque/process_location.

  • Sets the new ENSA2 parameters accordingly, for example, enq/enable.

The automatic transition of old enqueue parameters is not possible during the update procedure. See the documentation in the SAP Help Portal mentioned above for further assistance.

After the update procedure, the production system will be started with the new ENSA2/ERS2 setup, and you will be asked to change the high availability (HA) settings accordingly.