Work Processes & SAP Services

What is an SAP LUW, and which principle does it obey?

Where are spool (output) requests stored temporarily before printing?

How does the dispatcher assign dialog work processes when a user runs several dialog steps?

How is the update split into V1 and V2, and what happens if no V2 process is configured?

If a system has no separate ASCS instance, where do the message server and enqueue work process run?

What is the role of the dispatcher, and what happens if it fails versus if a work process fails?

Why must all enqueue work processes run on the same instance?

What does the update service do, and who decides whether it is used?

What is the SAP Virtual Machine Container (VMC)?

In modern SAP systems, how does the standalone enqueue server (ENSA2) improve lock high availability over the classic replicated lock table?

Which services does the application layer of an AS ABAP system provide?

What is the relationship between the dispatcher and a work process, and what does a work process consist of internally?

What are the minimum work-process count rules for an SAP system and for each instance?

What happens to SAP locks if the enqueue server fails, and how is this prevented?

What does an (A)SCS instance manage, and why does it exist?

How many message servers does an SAP system have, and what happens if it fails?