3-tier auto-scalable web application architecture. The AWS architecture diagram example '3-Tier Auto-scalable Web Application Architecture' was created using the ConceptDraw PRO diagramming and vector drawing software extended with the AWS Architecture Diagrams solution from the Computer and Networks area of ConceptDraw Solution Park.

Presentation tier - This tier, which is built with, cascading style sheets () and, is deployed to a computing device through a web browser or a web-based application. The presentation tier communicates with the other tiers through application program interface () calls. Application tier - The application tier, which may also be referred to as the logic tier, is written in a programming language such as and contains the that supports the application’s core functions. The underlying application tier can either be hosted on distributed servers in the cloud or on a dedicated in-house server, depending on how much processing power the application requires. Data tier - The data tier consists of a database and a program for managing read and write access to a database. This tier may also be referred to as the storage tier and can be hosted on-premises or in the cloud. Popular database systems for managing read/write access include, PostgreSQL, Microsoft SQL Server.

Benefits of a 3-tier app architecture The benefits of using a 3-layer architecture include improved, performance and availability. Klyuch k programme astrofd 18. With three tiers, each part can be developed concurrently by different team of programmers coding in different languages from the other tier developers.

Because the programming for a tier can be changed or relocated without affecting the other tiers, the 3-tier model makes it easier for an enterprise or software packager to continually evolve an application as new needs and opportunities arise. Existing applications or critical parts can be permanently or temporarily retained and encapsulated within the new tier of which it becomes a component.

Posted on 14th October 2012 by Tony Marston This article is in response to written by Anthony Ferrara which I feel gives only a very limited view of what can be a complex subject. Different people have different ideas on how an application can be split into tiers, and different ideas on the benefits which can be gained from making such a split. I have been designing and building multi-tiered applications in different languages for over a decade, so my exposure to this subject has been quite extensive. I would like to share with you my experiences on this subject and hopefully give you a more detailed picture. A 'tier' can also be referred to as a 'layer'. A wedding cake is said to have tiers while a chocolate cake is said to have layers, but they mean the same thing. In the software world Tiers/Layers should have some or all of the following characteristics: • Each tier/layer should be able to be constructed separately, possibly by different teams of people with different skills.