If I am not wrong, in a dual stack system, the web dispatcher communicates with the ASCS' MS when there is a request from a user.
Therefore, I wonder, why there are 2 MS in dual stack system? does the ASCS' MS talk directly to the SCS' MS?
so, in conclusion:
1. why there are 2 MS in dual stack system?
2. what is the purpose of each MS?
3. how can the web dispatcher communicate only with the ASCS' MS? does ASCS' MS has information about the java instances as well as the ABAP ones?
thanks in advance,