Re: Help on n-Tier architecture ???
- From: Michael Nemtsev <nemtsev@xxxxxxx>
- Date: Thu, 19 Jan 2006 19:37:21 +0000 (UTC)
Hello serge,
Take into account that there are two concepts - "tier" and "layer"
Tier is a physical location and layer is abstract location. Tiers located on different machines and liers could locate on one.
Advance of n-tier architecture is to give scalability, reliability and durability, and it's not important that all layers/tiers should be physically distributed
In general, in small apps, the tier-layer-layer is most common solution. It means that smart-client locates on separate machine and business and data layers on the second one. In your scenario B and C componens could locate together.
To move divide the on different machines only thing u should undertake is to create proxy from component C and use it with your B component.
It's a couple of clicks in Component Explorer
sc> I am studying an application architecture based on an n.Tiers
sc> architecture. I have it defined as:
sc> Presenation tiers
sc> Buisness logic
sc> DataLayer
sc> Actually as far as I have understand benefits of 3 or N-tiers
sc> architecture, excpet all adavntage of code maintenance and
sc> scalability, they shoud be able to be installed separatly on
sc> different machine rignt ?
sc> sc> In that case let say that my Presnetaion layer is my Internet
sc> browser from a computer A. Then my buisness logic is installed on a
sc> computer B (Web Server) and Datalayer is on Computer C (SQL server
sc> DB).
sc> sc> On computer C I have a class library which is in charge to connect
sc> to the
sc> database
sc> From computer B my application need a reference to the class library
sc> of
sc> computer C.
sc> How all this reference is done ?
sc> sc> thnaks for your reply
sc> regards
sc> serge
---
WBR,
Michael Nemtsev :: blog: http://spaces.msn.com/members/laflour
"At times one remains faithful to a cause only because its opponents do not cease to be insipid." (c) Friedrich Nietzsche
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