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  • 1. 3 Tier architecture Anjali g anjalig2009@gmail.com www.facebook.com/AnjaliG eetha twitter.com/AnjaliGeetha in.linkedin.com/in/Anjali G 9497879952
  • 2. MAIN POINTS • What is 3 tier architecture? • Evolution of 3 tier architecture • What does 3 tier architecture offers you - advantages and disadvantages • Comparison with MVC
  • 3. What is 3 tier architecture? • A three way interaction in a client server architecture - The user interface stored in the client. - The bulk of the business application logic stored in one or more servers. - The data stored in the database server.
  • 4. Evolution to the 3 tier architecture  Single tier  Dual tier environments  3 tier architecture
  • 5. Single tier  Time for huge main frames  All processing in a single computer  All resources attached to the same computer  Access via dumb terminals
  • 6. Single tier…  Advantages  Simple  Efficient  Uncomplicated  Disadvantages  The cost of the central machine very expensive
  • 7. Dual Tier environment  Personal computers  Necessity of providing personal software  The client server model was born…
  • 8. Dual tier environment..  Logical system components – Most which are on the client  Advantages • Easy to maintain and modification is bit easy • Communication is faster  Disadvantages • In two tier architecture application performance will be degrade upon increasing the users. • Cost-ineffective
  • 9. 3 tier architecture  Involves one more layer called business logic/middle layer.  The client only displays GUI and data, but has no part in producing results. • Less resources needed for client workstation • No client modification if database location changes • Less code to distribute to client workstations  One server handles many client requests • More resources available for server program • Reduces data traffic on the network
  • 10. Benefits..  Scalability • The application servers can be deployed on many servers • The database no longer require a connection from every client.  Better Re-use  Improve data integrity • The middle tier can ensure that only valid data is allowed to be updated in the database  Improve security • Since client doesn’t have direct access to the database • Business logic is more secure since it placed on a more secure central layer  Hidden database structure
  • 11. Drawbacks • Increased complexity/effort Comparison with MVC - In 3 tier; client tier never communicates directly with the data tier; - In a three-tier model all communication must pass through the middle tier - 3 tier is linear. - MVC Architecture is triangular. - The view sends updates to the controller, the controller updates the model, and the view gets updated directly from the model.
  • 12. Thank you..
  • 13. If this presentation helped you, please visit our page facebook.com/baabtra and like it. Thanks in advance. www.baabtra.com | www.massbaab.com |www.baabte.com
  • 14. Contact Us Emarald Mall (Big Bazar Building) Mavoor Road, Kozhikode, Kerala, India. Ph: + 91 – 495 40 25 550 NC Complex, Near Bus Stand Mukkam, Kozhikode, Kerala, India. Ph: + 91 – 495 40 25 550 Start up Village Eranakulam, Kerala, India. Email: info@baabtra.com