System architecture

SYSTEM

ARCHITECTURE

IN DAILOGUE FORMAT

SCENE DESCRIPTION:

It was 11 in the night when I called up my friend, he was planning to sleep. I told him about an IT topic and he was suddenly anxious to know more about it. This was how communication started.

ME: I am going teach you about an IT topic i.e. System Architecture. It is very interesting topic and you will be able to relate it to your life.

KUNA: That sounds good. Let see how much I will able to understand.

ME: Please stop me wherever you have any doubt. Feel free to ask all questions and clarify all your doubts.

So let start the topic, what are the 2 things which you require to do any operation?

KUNA: Intelligence….

ME: Yes but basic things you require are Data and a process to analyse those data. So in IT terms we can use Database for data and Application (software) for process. So are you clear till now?

KUNA: Yes, in IT Terms database and application are used to do routine operations.

ME: Now I will make you understand about the architecture which we use in our routine life. It has 3 different architectures. According to the usage, the entire three tiers are used.

1. Single tier: it is used at the individual level where data is stored in your laptop. Here they have both data and application in your laptop, you can access that data and directly used in your laptop.

2. 2 tier architecture: In this there are multi users. So all the user requires data which in this case can be stored in the server and all the users are connected to it. They can directly access those data and analyse them by using application which is available in your laptop.

KUNA: Hey can you give some example of 2 tier architecture.

Me: like in praxis B – school, they are many users which are directly connected to the server. Here if data would have stored in laptop then other people might had not got that data.

1. 3 tier architecture: This is used for big organisation where there are many users spread over vast area. Here data and application are there in database, which is usually used by all the departments across India. Here users are not very comfortable with IT technology, so application is defined in upper level. Here WAN (wide area network) and Internet can be used for transfer of information. Using internet is inexpensive, whereas WAN is more secure network.

Hope you had understood till now.

KUNA: yes it’s really great.

ME: Now I will take you into deep in this topic. As you know there are various departments in an organisation. Earlier all the data from different department were used to be stored in different database, due to which data was not widely available across organisation.

Presently, a corporate database is used to store data from different departments. Here many back ups are kept of corporate database for making it safe, in case of database failure. It will enable them to reduce redundancy and improve efficiency.

Are you getting all the concepts?

KUNA: ok that means 1 database is used to access data across India. This all is for a large organisation.

ME: Yes you are right. Now let’s find implication of a standard application system in place. If we install ERP in an organisation, its application formation work will not be there, company will be able to concentrate on its core competency. ERP will give a standard application for all the departments, which will make its user life easy. It is cost effective as well as time saving.

All the organisations have ERP in place along with a corporate database, which enable them access information across their vast area and in a profitable manner.

KUNA: That was great. Can you tell me something about ERP?

ME: Various companies like SAP, ORACLE etc offer ERP. It is available for all type of organisation. According to the operations of the company and users, company can choose ERP package.

This was all I had to explain you. If you have any doubt, feel free to ask.

KUNA: Thanks, I understood entire topic and enjoyed learning it.