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SAP Training: Beginners Guide – Learn SAP ABAP – SAP System Architecture

SAP Training: Beginners Guide – Learn SAP ABAP – SAP System Architecture

System Overview So we’re going to discuss the technical
architecture of a typical SAP system. Then we’re going to move on to the landscape
architecture and just discuss why we break our landscape into multiple systems.
Here we have a slide showing a three-tier client server architecture of a typical SAP
system. At the top we have the presentation server. The presentation server is any input
device that we can use to control an SAP system. So here we are showing the SAP GUI. But we
are not limited to just using the SAP GUI. We can use a web browser, mobile device or
any other form of input you can think of. The presentation layer communicates with the
application server. An application server is the brains of an SAP system. This is where
all the central processing gets done. You can see here what’s showing the application
server isn’t just one system in itself. Your application server can be made up of
multiple instances of the processing system. Now the application server in turn communicates
with the database layer of the three-tier architecture. The database is kept on a separate
server, a separate system in itself mainly for performance reasons but also for security
as well. It provides a separation and that’s why we have got these three different layers
in this whole SAP system. The presentation server communicates with
the application server. The application server does all the processing. It makes calls to
the database. Data is passed back to the application server. More processing is done before the
results and then sent to the presentation server.
Now, let’s quickly discuss a typical landscape architecture. Now, I say typical but you’ll
find that when you work with SAP, there is no typical (in inverted comments), landscape
architecture that most companies use. What you do fine that is very common is you’ll
find the development system, you’ll find the testing system, and then you’ll find
the production system. Now, why do we have these three systems? Well,
it’s fairly straightforward. All the development work and initial unit testing that we do in
our SAP work gets done on a development system. This ensures we do not affect any of the system
that is being used by the company. Once our developments we think are good enough to be
tested by maybe an external source or someone else within your company whose role is to
carry out testing, we move our developments using what’s called a transport system to
the next system, which in this case is the testing system. On the testing system, normally
no development is done at all. It’s just use for testing what developments were carried
out in the development system. If everything works out and everything passes in the test
system we then use a transport system again to move our developments or our program changes
into the production environment. When code goes into the production environment, that’s
when it’s turned on and that’s when it’s used within the business itself.
Now a landscape architecture is not separated just for development purposes. Your company
can have other reasons. That can be the quantity of data that a normal production system holds.
It can be too great to actually be used in the development environment because normally
your development system and your testing system are not as large as a production system. You
only want a subset of data to test on. There’s also the security element that you need to
look at. More often than not, companies do not want developers to see live production
data for data security issues. You know, you’ve got employee data on the system, you’ve
got sales data, and you don’t want people who are not involved in those specific areas
to actually see the live data. So normally, your development and testing systems have
a different set of data that they can develop and test on.
Now, I would say, the three systems we have here are normally a minimum. You know, you
normally have got your development system, testing system, and the production system
but it can increase to four systems. Maybe you want a training system. Maybe you got
multiple projects running at the same time. So maybe you’ve got two different development
systems, you could then add up two different test systems, you know, and then maybe a consolidation
system before it is passed to the production environment. This is all dependent on the
company that you’re gonna be working at. But one thing that is common is that each system
that you do have in your landscape architecture will have its own application server and its
own database server. This then ensures we have platform independence.

13 comments found

  1. Why no love for this videos?
    This videos have such a professional look to them, They stand above the rest.
    Keep up the good work, thanks.

  2. Most advertised jobs do ask for experience. If you work in a company with SAP already, then it is much easier because if you make it known to the SAP team you are learning they will likely be willing to pass work your way. It's really difficult to find good SAP pro's so show your worth and the work will come.

  3. Hi Peter,
    I have no programming language experience.  I would like to learn ABAP.I am an SAP SD consultant. Is it possible to learn ABAP without any knowledge of any program even C language,I am not an Engineering graduate either.

  4. Hi Pete!
    Do you have a video explaining the subtleties behind the events of the selection screen? I am trying to understand the difference between AT SELECTION SCREEN and AT SELECTION-SCREEN ON

  5. In video tutorials, we can easily observe the contents of the lesson and it is very useful for beginners,.

  6. Hello peter,

    I have gone through all your tutorials and these are very helpful ,
    but i need more information about Performance Analysis .

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