SAP Basis Learnings

Logon groups (or work groups) are configured to dynamically distribute the load being processed by the dialog work processes. Setting up logon groups helps in uniform distribution of the work load across the available instances. While logging on using a logon group, the ABAP message server is contacted to identify the instance with best performance statistics within the selected logon group . A report runs in SAP every 5 minutes which determines the load across each server and updates in the memory area of the message server. This information will be used by SAP GUI to determine the best instance to distribute the next user.   SAP Logon Process Let’s start with discussing an overview of SAP Logon process. High-level understanding of the process will help to explain details of SAP Logon configuration. SAP Logon Process Overview When user(s) accessing SAP system via  SAP GUI , the request is forwarded into ABAP dispatcher for the direct logon. If SAP GUI is using logon group, the logon w

TMS is used to move, manage and control copy development objects and customizing settings in an orderly fashion across SAP Landscape. STMS [SAP Transport Management System] Domain Controller–:  It is used to control the landscape. There will be only one domain controller in the landscape. Initially, it is set to development and later can be moved to on higher available system such as PRD/QAS/Pre7/ production but to keep things simple most of the cases we keep DEV as Domain Controller Member Systems–: The other systems are included in the domain referred to as member systems.  How to Configure   STMS Log on to the SAP system, which is decided to be the Domain Controller, in client  000  and enter the transaction code  STMS. If there is no Domain Controller already, a system will prompt you to create one. When the Transport Domain is created for the first time, the following activities happen in the background: Initiation of the Transport Domain / Landscape / Group Creating the user  TMS

  SAPSTARTSRV (through SAPCONTROL interface) offers a variety of web methods that can be used to monitor/manage the instances of the system. They are specially useful for handling startup error scenarios. The "must-know" ones are listed below and also the general pattern for executing them: GetSystemInstanceList OK hostname, instanceNr, httpPort, httpsPort, startPriority, features, dispstatus testserver001, 0, 50013, 50014, 3, ABAP|GATEWAY|ICMAN|IGS, GREEN testserver001 , 1, 50113, 50114, 1, MESSAGESERVER|ENQUE, GREEN testserver001 , 2, 50213, 50214, 3, ABAP|GATEWAY|ICMAN|IGS, GREEN sapcontrol -nr <instance number> -function <web method name> 1: "GetSystemInstanceList": This one returns the list of active instances for the system, along with component list and the current status. GetSystemInstanceList   OK   hostname, instanceNr, httpPort, httpsPort, startPriority, features, dispstatus   testserver001, 0, 50013, 50014, 3, ABAP|GATEWAY|ICMAN|IGS, GREEN