What is a 3-Tier Architecture ?

[AricC]

I've done the exact same thing - it can be very confusing!

Or awesome if you have time on your hands.

[Banfa]

Well I know people who say well since wiki can be edited by anyone it's total BS but really most of what I've seen seems to be accurate.

wikipedia has had some bad press, however most of it seems to be related to articles about people where there appears to have been a lot of controversy in respect of people posting inaccurate and unsubstantiated data and people getting banned when they have corrected or objected to articles about themselves.

However the data about non-people always seems to be accurate so I limit myself to only using wiki to look up stuff, not people.


I remember reading a article on TheRegister that was examining a published comparison between Wikipedia and The Encyclopedia Britancia. It pointed out several ways in which the comparison had been biased towards wiki and having corrected for these biases wiki ended up as a very poor second to Britanica (as opposed to the about equal the original comparison produced).

However I suspect the wiki is probably better for technical and computer related stuff as that tends to change fast and the type of people using wiki I suspect tend to be into that sort of stuff.

Also lets face it, it is far easier to log onto wiki home page and type a query in a search box than it is to find the relevent entry in a set of 30 odd large books.

[Tuanisviet]

The 3-tier question held major points on my DB final exam... write lots with key words! :D

[Mmanjul]

Hello,

Please tell me about 3-Tier Architecture in development of a software?

Pankaj,

There are already so many replies but I could n't hold myself as I love this topic.

First of all everyone rightly said Three tier means front end (GUI etc) , middle layer and the Backend (Database). Middle layer as you could imagin is the business logic like programs you write but adding to that there are so many technologies available in the market called "Middleware " which can act as middleware,for example Tuxedo (from BEA systems) , TIBCO , MQSeries (from IBM) and so on. with the availablity of these packages in the market the developing a three Tier application has become really easy and cost effective as companies can choose a middleware instead of devoting time in developing the whole business logic by scratch.

Now a days applications are developed with multi-tier architecture(wh ich has more than 3-tier).

Hope this helps.
MM