SAP Architecture Basic queries

[Former Member]

Hi All,

SAP IDES ECC6.0 (both ABAP and JAVA stack) is installed on my windows server 2003. Before posting this question, I have already gone through SAP library links in understanding SAP WAS architecture. But this question is for better understanding (actually to clear some basic doubts).

SAP MMC structure is as follows:

Application server host name is: MASTER

SID is DEV

SAP Systems

|______ DEV

|________ MASTER (database)

|________ master 0

|________________ Process list

|_____________________ msg_server.EXE

|_____________________ disp+work.EXE

|_____________________ igswd.EXE

|________________ ABAP WP Table

|_____________________ DIA,DIA,DIA,DIA,UPD,ENQ,BTC,BTC,,BTC,SPO,UP2

|________________ J2EE Process Table

|_____________________ SDM

|_____________________ dispatcher

|_____________________ server0

|________________ ICM

|________ master 1

|________________ msg_server.EXE

|________________ enserver.EXE

I am little confused about which is Central Instance, Dialog instance, Abap central services and Java Central services.

Please explain with much clarity.

Many Thanks,

Girish

[former_member126060]

Hello Girish,

I am just splitting up the SAPMMC tree that you pased for clarification :

1. ABAP Central Instance

======================

|________ master 0

|________________ Process list

|_____________________ msg_server.EXE

|_____________________ disp+work.EXE

|_____________________ igswd.EXE

|________________ ABAP WP Table

|_____________________ DIA,DIA,DIA,DIA,UPD,ENQ,BTC,BTC,,BTC,SPO,UP2

2. Java Central Instance

======================

|________________ J2EE Process Table

|_____________________ SDM

|_____________________ dispatcher

|_____________________ server0

3. Java central Services

===================

|________________ msg_server.EXE

|________________ enserver.EXE

ICM is part of ABAP instances.

If you have addition dialog instance it will have Dispatcher, Work process and ICM

If you have addition java instances then it will have Java Dispatcher and Server nodes.

Abap stack central instance will have Mesage server process and enqueue server process.

Java stack central instance will have SDM, namely software deployment manager, with new coming releases there is no more SDM but is replaced by deployment controller.

I hope this clarifies.

Best Regards

Niraj

[Former Member]

it would be great for beginners if experts provide their valuable suggestions for above question.

[Former Member]

Hi,

msg_server.EXE

enserver.EXE, The message server and enqueue server make up the central instance.

master 0 makes up the dialog instance.

I dont think there is a term ABAP Central Services, however all the wp's make up the

ABAP services.

The list under j2ee process table make up the java services.

Regards,

vishi