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Enqueue and dequeue in sap abap update#

And database running on other application server. In classical SAP (CI, Central Instance), message server, enqueue server, work process (application server) running on same system.

Enqueue and dequeue in sap abap update#

ABAP Application server (consists of Dialog, Batch, Update and so on…)Īnd these components connect each other to make successful connection.īelow diagram shows step-by-step process –Ī SPoF is a critical application component and if these are not available then this will become service outage for users.

ASCS instace consists of – Message Server, Enqueue Server.

So, lets start – How SAP connection works –īasically, SAP consists of following components –

What is ENSA1 (Standalone Enqueue Server), ERS (Enqueue replication Server) and HA setup Background –īefore understanding ENSA2, lets have a quick recap and understand BASIC conceptĢ. The Standalone Enqueue Server 2 prevents multiple users from simultaneously accessing the same data by using the lock table to hold all current user locks in the main memory. On ASCS, message server and Standalone Enqueue Server 2 runs together. So, lets understand, what is Standalone Enqueue Server 2 (ie. From ABAP Platform 1809, the Standalone Enqueue Server 2 (and Enqueue Replicator 2 for high-availability scenarios) is default installation.