ROLE OF CACHE

Explain the role of cache in a disk subsystem:

(looking for: posted writes, to allow the OS to continue processing requests, rather than waiting for a write to be physically committed to a disk drive)

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DATABASE ARCHITECT OF AN SAP

Explain how to layout or architect an SAP database server in terms of data, logs, and so on, to achieve the best performance:

(looking for: keep data and logs on separate spindles, RAID 1 or 1+0 best, separate data in discrete data and index volumes, move logs to separate high performance RAID 1 drive pairs, prefer hardware RAID to software/OS RAID)

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RESPONSE TIME

Response time 'seems' to be slow, per a number of users that have called in to the help desk – how do you troubleshoot this?

(looking for: Check app servers for avg response times in DIALOG using ST03, compare to baseline stats; may also ask a user which particular transaction he is running, and then check the history of that transaction via ST03. Ask the user to enable response time checking on his SAPGUI, so that you can check his specific response time between the front-end and the application server. You will also want to ensure no one has changed logon load balancing, check ST04 for cache hit rates, and check ST06 for CPU utilization for users & system)

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VERSIONS IN SAP

Discuss how the different releases of R/3 since version 3.1i differ in terms of hardware requirements:

(looking for the fact that every new release – to 4.0B, 4.5x, 4.6x, 6x – requires additional RAM, processing power, and even basic disk space just to host the same number of users).

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UPDATED PROJECT

What is the difference between updated project and end to end project. explainAnswer1:Some organisations select to implement SAP module by module, thus gets updated as per their convenience / schedule. This is called as updated project.

Some organisations simply plan all integrated functional modules and decide to go-live with all functional modules and take their entire operations on SAP. This is called as End to End SAP implementation project.

Answer2:Upgrade Project is a project where in SAP is already in place and it is the version upgrade from a lower end to a higher version.

End to End project is a project where SAP is implemented for the first time.

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LOCKING ACCOUNTS

When you are Locking/Unlocking accounts what happens behind the scenes?

User accounts can be locked/unlocked via SU01 (User Maintenance.) But, what goes on behind the scenes? What does  the system do to actually set this?

The table USR02 gets updated. The field UFLAG determines if the user account is locked or unlocked. The value "64" indicates that the user account is locked. The value "0" that the user account is unlocked. Knowing this, you can then issue an update statement at the database level that locks all users in mass.

Don't lock yourself out, though! Use exceptions for super user accounts in your update statement.Notice that 4.6b and above have made improvements to this kind of task, making the locking/unlocking a bit easier. However, changing at the database level is much faster and it is just one simple query.

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LOCKED TRANSACTIONS

How can you View Locked Transactions?

As you know, you can lock/unlock transaction codes via SM01. But, how do you go about viewing the transactions that are locked in the system? You need to look in field CINFO, table TSTC.

Within SAP, you can use either SE11 or SE16 to browse the table contents. Make sure you enter "A0" as the "HEX01 data element for SYST" starting value and "A9" as the ending value.  This will list all the transactions locked in the system.

Note:


The CINFO field description is "HEX01 data element for SYST

Transaction code SM01 -- Lock/Unlock Transactions -- cannot be configured for display-only authority and is not easily used for that purpose anyway. Check your SAP system for the SAP report RSAUDITC or RSAUDITC_BCE (they both contain

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DISABLING MULTIPLE LOGONS

How do you Disable Multiple Logins in the Same Client?

To disable multiple user logins within the same client implement this parameter in the instance profile:

login/disable_multi_gui_login = 1

If you do not use this parameter in your system, users have the ability to ignore the warning window at the time they try to login to the same client.  Activating this parameter in your system will make you look good if you get audited! 

How about exceptional logins?

In case you're wondering how to allow multiple logins for certain key users you can implement parameter login/multi_login_users. You can list the user IDs that should be ignored if the parameter above is active in your system.

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CLIENT COPY VS CLIENT REFRESH

What is the difference between a client

copy and client refresh?

Some times these are the same, For

example, if you are performing a copy to an

existing client for the express purpose of

updating the data, then it is called Client

Refresh.

If you are copying to a newly created client

then it is more appropriate to say “client

copy.”

Another way of thinking about this is that a

client copy from production to a QA server

or from production to DEV server is really a

client refresh

Some times these are the same, For example, if you are performing a copy to an existing client for the express purpose of updating the data, then it is called Client Refresh.

If you are copying to a newly created client then it is more appropriate to say “client copy.”

Another way of thinking about this is that a client copy from production to a QA server or from production to DEV server is really a client refresh.

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ADDING NEW INSTANCE

We want to install another new instance on same

development box. Is this possible? What are some

of the important considerations?

Yes, it is possible to have more than one

instance on a single box. The key is to use a

different SID and a different system number.

It is also important to note that for a 64 bit

SAP kernel, SAP recommends a 20 GB swap

space for 1st instance and 10 GB per each

additional instance.

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DISABLE IMPORT ALL IN STMS

How can one disable the "Import All" button on

STMS for the queues?

Login to your Transport Domain

Controller. Run STMS->Overview->System.

Choose the System you want to disable

import all. Go to Transport Tool tab.

Add/Create Parameter "NO_IMPORT_ALL"

set its value to 1.

So Importing the Transport Requests is the critical. Sometimes by mistake if one click on the button Import All in the production environment all the Transport Request which is in released status or already Imported to Production can be directly Imported to the production environment (Which may not be required in the Production). This will create great impact in the production Server.To avoid such situation, IMPORT ALL Icon should be disabled in STMS.Procedure to Disable IMPROT_ALL Icon in STMS:-1) Go to STMS Tcode

2) Go to Menu Option Overview

3) Select System4) Choose SAP SYSTEM

5) Go to Transport Tool Tab

6) Create Parameter "NO_IMPORT_ALL" with value 1 (True)

7) Save it.

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OK CODE IN BASIS

What is an OK code?

An OK Code is used by a program to

execute a function for example after a

pushbutton has been clicked

ok_code acts just as a temporary variable that stores the value of sy-ucomm.

When user interacts with the screen elements, the function code that you have assigned is filled in the sy-ucomm field which is turn gets reflected in OK_CODE.

In your ABAP programs, you should work with the OK_CODE field instead of SY-UCOMM. There are two reasons for this: Firstly, the ABAP program has full control over fields declared within it, and secondly, you should never change the value of an ABAP system field. However, you should also always initialize the OK_CODE field in an ABAP program for the following reason:

In the same way that the OK_CODE field in the ABAP program and the system field SY-UCOMM receive the contents of the corresponding screen fields in the PAI event, their contents are also assigned to the OK_CODE screen field and system field SYST-UCOMM in the PBO event. Therefore, you must clear the OK_CODE field in the ABAP program to ensure that the function code of a screen is not already filled in the PBO event with an unwanted value. This is particularly important when the next PAI event can be triggered with an empty function code (for example, using ENTER). Empty function codes do not affect SY-UCOMM or the OK_CODE field, and consequently, the old field contents are transported.

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Web Dyna Pro

what is Web dyna pro
Web Dynpro (WD) is a proprietary web application user interface technology developed by SAP AG and exists in a Java Both have in general the same functionality, but usually one flavor is improved after the other, so temporary one flavor is more advanced than the other. Hence, the decision for one of the two flavors shall be based on organizational and business circumstances, but not on functionality.

Main advantages of Web Dynpro over other technologies
• typed access for design time checks, e.g. navigation links and messages are accessed via types instead of string keys like in JSF
• diverse services for backend access, like aRFC, JEE and Web Service data models
• integration with SAP Interactive Forms by Adobe, which are interactive PDF forms, during design (same IDE) and run time (data sharing)
• integration with business process management and business rules management (since NetWeaver CE 7.1 EHP 1)
• designed to support development big scale applications by adding multiple grouping layers on top of Java packages (DCs, SCs, products)
• runs on different clients e.g. web browser, mobile device, widget engine

Main disadvantages
• proprietary, running only on SAP servers
• less flexible due to support for multiple clients (i.e. custom html is not possible). To reduce the limitations, several measures have been taken. For example, WD supports so-called "islands" for e.g. flash applications that enrich the Web Dynpro UI element collection by rich UI elements.

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SAP Netweaver

What is SAP NetWeaver
SAP NetWeaver is SAP's integrated technology platform and is the technical foundation for all SAP applications since the SAP Business Suite. SAP NetWeaver is marketed as a service-oriented application and integration platform. SAP NetWeaver provides the development and runtime environment for SAP applications and can be used for custom development and integration with other applications and systems.

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SAP Easy Access

What is SAP EASY ACCESS

 It displays a user menu that displays the option to perform tasks like creating & modifying transaction reports & web addresses.

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presentation, application and database servers in SAP R/3

What are presentation, application and database servers in SAP R/3
The application layer of an R/3 System is made up of the application servers and the message server. Application programs in an R/3 System are run on application servers. The application servers communicate with the presentation components, the database, and also with each other, using the message server. All the data are stored in a centralized server. This server is called database server.

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IDES SAP

What is IDES


International Demonstration and Education System. A sample application provided for faster learning and implementation

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Can BW run without a SAP R/3 implementation

Can BW run without a SAP R/3 implementation
Certainly. You can run BW without R/3 implementation. You can use pre-defined business content in BW using your non-SAP data. Here you simply need to map the transfer structures associated with BW data sources (InfoCubes, ODS tables) to the inbound data files or use 3rd part tool to connect your flat files and other data sources and load data in BW. Several third party ETL products such as Acta, Infomatica, DataStage and others will have been certified to load data in BW.

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Implement SAP

Why do you usually choose to implement SAP
There are number of technical reasons numbers of companies are planning to implement SAP. It’s highly configurable, highly secure data handling, min data redundancy, max data consistency, you can capitalize on economics of sales like purchasing, tight integration-cross function.

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“Business Content” in SAP Business Information Warehouse SAP

Explain the concept of “Business Content” in SAP Business Information Warehouse


Business Content is a pre-configured set of role and task-relevant information models based on consistent Metadata in the SAP Business Information Warehouse. Business Content provides selected roles within a company with the information they need to carry out their tasks. These information models essentially contain roles, workbooks, queries, InfoSources, InfoCubes, key figures, characteristics, update rules and extractors for SAP R/3, mySAP.com Business Applications and other selected applications.

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