3 tier architecture

2. Sreyachandran.v
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3-TIER ARCHITECTURE

3. Disclaimer: This presentation is prepared by trainees of
baabtra as a part of mentoring program. This is not official
document of baabtra –Mentoring Partner
Baabtra-Mentoring Partner is the mentoring division of baabte System Technologies Pvt . Ltd

4. What A Tier Means?
• In computer terminology, tier corresponds to layers of different
systems involved in communication.
• 3 layers are
User interface
Business logic
Backend

5. • Example: A software to maintain regular customer details in a
super market to provide offers.
A GUI should be presented (displayed) to the employee to
enter the customer ID.

6.  Business logic layer : Some program with sufficient logic
application to read the ID and display the customer details.
 Database should be maintained with regular updates of credits
and debits etc.

7. 1-Tier Architecture
•This single system with all the 3 requirements is called as 1-
tier.
GUI
BUSINESS LOGIC
DATABASE
1-Tier

8. ADVANTAGES
• Simple
• Easy to design
DISADVANTAGES
• Not scalable(Difficult for multiple users).
• Hard to modify.
• Monolithic –high maintenance.

9. 2-Tier Architecture
BUSINESS
LOGIC
&
DATABASE
GUI
1’st Tier(client) 2’ndTier(Server)
•All the required components are coupled within client and
server.

10. DATABA
SE
GUI
&
BUSINES
S LOGIC
1’st Tier(client) 2’ndTier(Server)
•It is possible to implement the 2 tier architecture in a single
system with a logical separation between layers.

11. ADVANTAGES
• Simple to implement compared to 3-tier.
• Scalable.
• Maintenance of code becomes easy compared to
3 tier.
DISADVANTAGES
• Performance degrades when users increase.
• Complex application rules difficult to
implement in client and have poor performance.

12. 3 Tier Architecture
BUSINESS
LOGIC
DATABA
SEGUI
•User Interface, Business Logic and Database Server are
separated.

13. ADVANTAGES
• Complex application rules easy to
implement in application server .
• Scalability-Superior performance for medium to
high volume environments.
• Flexibility. Because each tier can be managed or
scaled independently, flexibility is increased.
• More complex structure.
• More difficult to setup and maintain.
DISADVANTAGES

14. THANKYOU

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