ASCS

·  Introduction

·  Component of ASCS

·  Architecture of ABAP System

·  Separation of  ASCS from Central Instance

·  Installation of ASCS

 

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· Introduction

 

AS ABAP instance of an SAP system containing the enqueue server and the message server (ASCS = ABAP SAP Central Services).

Since SAP NetWeaver 7.0 the Message Server and the Enqueue Work Process  are separated from the Central Instance. These two are grouped within the ABAP SAP  Central Services (ASCS) as server.

 

 

 

 

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· Component of ASCS

 

Enqueue work process administers the lock table in the shared memory . The lock table contains the logical database locks of the ABAP runtime environment of the SAP system. Only one enqueue work process is needed for each system

Message Server (MS) handles communication between the distributed dispatchers within the AS ABAP, thereby enabling scalability of several parallel application servers. The message server is configured only one per SAP system

 

 

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· Architecture of ABAP System

 

 

 

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· Separation of  ASCS from Central Instance

 

1. Split ASCS from CI

 

 

 

2. Uninstall ASCS from CI host after splitting

 

 

 

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· Installation of ASCS

 

Now you can install the ASCS on new host.