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SAP Basis/Netweaver Tutorials, Monitoring, Administration(Certification) and FAQs


Saturday, 3 September 2011

How to determine the size of the client in SAP


This article answers the following queries :

  • How to determine the size of the client in SAP? 
  • What is the program used to determine the size of the client in SAP?
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Please note that client size of an SAP system can be determined in many ways.
Please find below easiest methods.

1) Goto Transaction SE38 and run report RSSPACECHECK as shown below




In the next step, please provide the client for which the size to be determined and please make sure below settings are kept and run the report.





The output of this report lists the size of the client

2) You can determine size of the client running  Local client copy (SCCL transaction) in test mode.




Provide the reqeusted  details of source client and target client and please donot forget to tick Test Run option before executing





Click continue in the above screen to proceed further.





Click on Resource Check push button in the above screen. The output of this will provide the size of the client.




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Friday, 2 September 2011

SAP Netweaver Interview Questions with Answers - Set 6

This article covers interview questions for SAP Basis/Netweaver consultants (Mostly for below 3 years experienced consultants)

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1) How to Unlock if SDM user got locked in SAP ?


2) What is the memory allocation sequence to a non dialog work process in SAP ?


3) What is the memory allocation sequence to a dialog workprocess in SAP?



4) Name the different SAP profiles and their start sequence

Answer : SAP Profiles



5) How to perform CPA cache refresh in XI or PI system?



6) How to import a transport manually at Os level ?




7) What are the different java monitoring checks you perform daily ?


                Java monitoring check list 2



8) What are the different SAP user types ?




 9) What are the different types of RFC communication in SAP ?


10) How do you access service market place ?

Answer :  S-User id is required to access service market place. 



Tuesday, 30 August 2011

How to search notes in SAP service Market Place ?

This article answers the following queries :

  • How to search notes in SAP service Market Place ?
  • How to download notes from SAP service market place?
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1)   Please login to SAP service market place as below :
      Type the following link on any browser
It opens a page similar to below screen and prompts to enter your market place credentials. you have to enter your s-user id and password and authenticate yourselves.





2)      Afterwards navigate to Help & Support  -> Search for SAP notes as shown in the below screen





3)      In the SAP Notes search screen,  in case you already know the note number, you can directly enter the note number in the box provided (highlighted) and press enter which  opens up the note number mentioned.




4)      Incase you donot know any specific note, you can do note search using key words.
In the example am searching notes with keywords “java is not coming up”.
It displays screen as shown below with the relevant notes. From those notes you can select the notes that are relevant for your problem and the system.






5)      To open any note from the displayed list, simply double click on that links that are displayed which opens the note as shown below





Click on the PDF pusbutton in the opened note to download the note in PDF format







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Types of RFC communication

This article answers the following queries:

  • What are the different RFC communication types in SAP?
  • What is the difference between Synchronous and Asynchronous RFC types?
  • What is the RFC communication type in which all requests are processed in order they are received?
  • What is the difference between Transactional RFC and Queued RFC?
  • What is/are the RFC types in which remote system is not required to be     available at the moment the RFC client program start the call?
  • In what scenarios, Queued RFC type can be used?
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There are mainly 4 types of RFC communication in SAP. They are

  • Synchronous RFC
  • Asynchronous RFC
  • Transactional RFC
  • Queued RFC

Synchronous RFC (sRFC) :  In this type of RFC communication, the calling program waits until the requested processing step on the remote system has ended and then continues to work locally.
In other words, both the systems involved must be available at the time the call is made.

Asynchronous RFC (aRFC) : In this type of RFC communication, the calling program gives the request to the remote system and immediately continues to work locally. The requested processing step is executed on the remote system in isolation.
If the remote system cannot be reached at the time of the call, the asynchronous calls of the RFC client are lost

Transactional RFC (tRFC) : This type of RFC communication is similar to asynchronous RFC but by allocating a transaction id(TID)  it guarantees  that if a request is sent several times because of network problems  it is processed only once. Unlike asynchronous RFC,  in Transactional RFC the remote system does not have to be available at the moment the RFC client program start the call. The data is held in the source system until the target system is available.
The report program RSARFCSE is called in the background at regular intervals and tries to place the unsuccessful requests, identified by their transaction id again.

Queued RFC (qRFC) : This RFC communication is an extension to the transactional RFC. In this method, all the requests are queued up(inbound queue and outbound queue) and are processed in a sequence only if it is certain that all preceding calls are processed correctly. This method guarantees that all the requests are processed in the sequence in which they are received.
This type of RFCs will be used in SCM (APO) systems for CIF queues etc where requests have to be processed in an order.



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Monday, 29 August 2011

SAP User Types



This article answers the following queries:

  • What are the different user types in SAP?
  • Which user type(s) is /are used for dialog free communication in SAP?
  • Validity period of a password is not applicable to which user type(s) in SAP?
  • What are the specific uses of system user type in SAP?
  • Which user type(s) cannot be used for direct logon to the SAP system?
  • Which user type in SAP does not have a check on validity of password expiry or initial password?
  • Which user type in SAP can be used to assign additional identical authorizations to other users?

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These are the 5 user types that are present in SAP

  • Dialog
  • Communication
  • System
  • Service
  • Reference

Dialog:  This is the most commonly used type. This user type is primarily for individuals to gain interactive system access.  A user of this type can perform dialog processing in interactive mode, background processing, batch input processing and CPI-C services provided there are no explicit restrictions via assignment of specific authorizations.
SAP licensing can prohibit multiple concurrent use of the same user id in production SAP systems.

Communication:  This user type is used for dialog-free communication between systems such as RFC (Remote Function call) communication. This user is not allowed to logon to the R/3 system or start dialog processing

System: This is the user type which can be used for dialog-free communication within a system (such as for RFC users for ALE, TMS, workflow and CUA) and for background processing.
A specific use of the system user type is validity period of a password won’t apply for this type. So, this can be used to run background jobs and in between RFCs so that jobs or RFC communications won’t fail due to expiry of the password.
Please note that logon in dialog is not possible used System user type.

Service: This user type is a dialog user which is available to a large, anonymous group of users. For example, to access via ITS (Internet Transaction Server)
There won’t be any check on initial password or expired passwords for this user type. Also, multiple logons are explicitly permitted for this user type.
However this user type should be assigned with great caution and with limited authorizations for security reasons.

Reference:  This user type is in general, non-person related user.  This user type cannot be used for logon. Instead this user type will serve as a reference for assigning additional identical authorizations to other users.
For example: In case you have to assign some identical authorizations to all internet users, you can create a reference user with those authorizations and use this reference user to assign identical authorizations to all other users.









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