DIALOGUE WRITTING
I am explaining System Architecture to a friend of mine who is a singer by profession. She has joined a computer short term course and so she wants to know more about this. She has come to meet me and out of some discussion about computers, we get into some depth and so her interest grows to know more about the topic.
Poonam: What do want to mean by systems architecture?
Me: System is - A group of independent but interrelated elements comprising a unified whole and architecture is – Design, construction and ornamentation. These are the two main factors involved which you need to understand.
So, Systems architecture can best be described as a representation of an existing system, and the process and discipline for effectively implementing the design for such a system. The set of relations (that is, embedded information) which architecture describes may be expressed in hardware, software, or something else.
Poonam: Ok, So that sounds interesting can you tell me something more about it?
Me: Yes, I have learnt about them in class, so can help you to some extent
Poonam: So what are the different types of architecture?
Me: There architecture is basically structured as 3 main tiers. Its single tier, two tiers, three tiers and a combination of these is multi- tier.
Poonam: Isn’t that very complicated. Can you please simplify? Or else its seems Latin to me
Me: Ok, wait. I will explain you step by step with example. Then it will be easier for you to understand.
Poonam: Yes please do that,
Me: The first is the single tier in which data is separated from the application even if they reside in the same physical hardware. Like for example in an Excel sheet with the data. The applications and the data are present in the same hardware. The data and the application are separate but the storage place is same. It can be the laptop, desktop or even the server.
Poonam: Ok fine. This is a simpler and better way of explaining.
Me: Yes, now let’s move to the next tier.
Poonam: Yes, sure
Me: Now the next type is the two-tier architecture. The data base is located in the main server and other applications are located in individual machines. The data base is connected to applications located in individual machines through internet, L.A.N or W.A.N. Like an institute buys any database which is stored in the main server. The application or the GUI of that software is stored in the individual machines. The access of that database is by using applications through internet or L.A.N. This will help in reducing the burden of the server, when many people will be using.
Poonam: I understood the first two tires; know explain me the other tire.
Me: Yes sure, the three-tier architecture is nearly same as two-tier architecture accept that in three-tier; the application is separated in two parts. The first part has all the critical applications and second part has the general applications. Like any big company. There all the business critical applications are separate. The general applications are available easily and business critical applications are available centrally.
Poonam: Oh wao now I know so much about architecture, and now you will tell me more about the multi- tier structure.
Me: the Multi-tier architecture is for banks which have branches in different locations. They use internet for connection as they cannot use WAN or LAN. So, the database & applications are stored in different servers. The client server is attached to the database & the application servers. The web server acts like an interphase between, the client server and the internet. Clients can access web server via internet.
Poonam: So, I know a lot about the different types of architecture.
Me: To add on let me tell you that we also have consolidations in these tiers were we have both web based as well as LAN or WAN based servers in one architecture.
Poonam: Fine. I know now a lot about the basic architecture, but what is the utility?
Me: Yes, in the integrated database system is based on the relational mode land we have few advantages. This architecture helps in less duplication of data and reduces inconsistency. It becomes easier to manage as the there is proper backup and security.
Poonam: ok. So most of the companies must be having this if I am not wrong
Me: Yes they do. To reduce the complexity the companies introduce ERP system. Which give a better integration across all functional areas and its faster to implement as we only need to purchase the right package from the vendor. We have specialist ERP solutions like Oracle, SQL Server and MySQL. A separate data ware house is also used for Business Intelligence.
Poonam: Is there any kind of risk involved in using this.
Me: When they use the web based enterprise system they have the risk of data getting stolen by the hackers. So to protect data from hacking companies always have a firewall server. This is the security which has to be provided for protecting form data getting transferred to the wrong person.
Poonam: Hope that’s all you have to say. Because this we be a lot of learning for the day.
Me: yes I guess I have told you all that I knew about systems architecture.
Poonam: Thanks a lot for teaching me.
Poonam: What do want to mean by systems architecture?
Me: System is - A group of independent but interrelated elements comprising a unified whole and architecture is – Design, construction and ornamentation. These are the two main factors involved which you need to understand.
So, Systems architecture can best be described as a representation of an existing system, and the process and discipline for effectively implementing the design for such a system. The set of relations (that is, embedded information) which architecture describes may be expressed in hardware, software, or something else.
Poonam: Ok, So that sounds interesting can you tell me something more about it?
Me: Yes, I have learnt about them in class, so can help you to some extent
Poonam: So what are the different types of architecture?
Me: There architecture is basically structured as 3 main tiers. Its single tier, two tiers, three tiers and a combination of these is multi- tier.
Poonam: Isn’t that very complicated. Can you please simplify? Or else its seems Latin to me
Me: Ok, wait. I will explain you step by step with example. Then it will be easier for you to understand.
Poonam: Yes please do that,
Me: The first is the single tier in which data is separated from the application even if they reside in the same physical hardware. Like for example in an Excel sheet with the data. The applications and the data are present in the same hardware. The data and the application are separate but the storage place is same. It can be the laptop, desktop or even the server.
Poonam: Ok fine. This is a simpler and better way of explaining.
Me: Yes, now let’s move to the next tier.
Poonam: Yes, sure
Me: Now the next type is the two-tier architecture. The data base is located in the main server and other applications are located in individual machines. The data base is connected to applications located in individual machines through internet, L.A.N or W.A.N. Like an institute buys any database which is stored in the main server. The application or the GUI of that software is stored in the individual machines. The access of that database is by using applications through internet or L.A.N. This will help in reducing the burden of the server, when many people will be using.
Poonam: I understood the first two tires; know explain me the other tire.
Me: Yes sure, the three-tier architecture is nearly same as two-tier architecture accept that in three-tier; the application is separated in two parts. The first part has all the critical applications and second part has the general applications. Like any big company. There all the business critical applications are separate. The general applications are available easily and business critical applications are available centrally.
Poonam: Oh wao now I know so much about architecture, and now you will tell me more about the multi- tier structure.
Me: the Multi-tier architecture is for banks which have branches in different locations. They use internet for connection as they cannot use WAN or LAN. So, the database & applications are stored in different servers. The client server is attached to the database & the application servers. The web server acts like an interphase between, the client server and the internet. Clients can access web server via internet.
Poonam: So, I know a lot about the different types of architecture.
Me: To add on let me tell you that we also have consolidations in these tiers were we have both web based as well as LAN or WAN based servers in one architecture.
Poonam: Fine. I know now a lot about the basic architecture, but what is the utility?
Me: Yes, in the integrated database system is based on the relational mode land we have few advantages. This architecture helps in less duplication of data and reduces inconsistency. It becomes easier to manage as the there is proper backup and security.
Poonam: ok. So most of the companies must be having this if I am not wrong
Me: Yes they do. To reduce the complexity the companies introduce ERP system. Which give a better integration across all functional areas and its faster to implement as we only need to purchase the right package from the vendor. We have specialist ERP solutions like Oracle, SQL Server and MySQL. A separate data ware house is also used for Business Intelligence.
Poonam: Is there any kind of risk involved in using this.
Me: When they use the web based enterprise system they have the risk of data getting stolen by the hackers. So to protect data from hacking companies always have a firewall server. This is the security which has to be provided for protecting form data getting transferred to the wrong person.
Poonam: Hope that’s all you have to say. Because this we be a lot of learning for the day.
Me: yes I guess I have told you all that I knew about systems architecture.
Poonam: Thanks a lot for teaching me.
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