Which of the following contains a message server?
A. Dialog Instance
B. Central Instance
C. Client Instance
D. Both Dialog and Central Instances
Answer (2)
The Central Instance in an SAP system contains a message server that manages communication between different instances. The Dialog Instance does not have a message server, nor does the Client Instance. Therefore, the answer is B. Central Instance.
;
In the context of SAP systems, the Central Instance is the component that contains a Message Server.
Central Instance (B) : This instance is a key component of an SAP system. It contains components such as the Dispatcher and the Message Server. The Message Server plays a crucial role by allowing communication between different instances and also helps in load balancing between servers.
Dialog Instance (A) : This type of instance primarily processes user requests and can contain Dialog, Update, and spool work processes. However, it does not contain a Message Server.
Client Instance (C) : This is not typically considered when referring specifically to SAP architecture components like Message Servers.
Therefore, the correct answer to which instance contains a Message Server is (B) Central Instance.
The Message Server is vital for managing communication between the different instances within an SAP system. It facilitates the distribution of requests and helps ensure that the system runs smoothly and efficiently. The Message Server is particularly useful in large SAP landscapes, where distributed processing is important for performance and reliability.
