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Table of contents
1.
Introduction
2.
What is Two-Tier Architecture?
2.1.
Example of Two-Tier DBMS Architecture
2.1.1.
Client Layer
2.1.2.
Server Layer
3.
Characteristics of 2 Tier Architecture
4.
Advantages of 2 Tier Architecture
5.
Disadvantages of 2 Tier Architecture
6.
Frequently Asked Questions
6.1.
What are the use cases of two-tier architecture?
6.2.
What are some limitations of a two-tier architecture?
6.3.
What is a 2 tier architecture?
6.4.
What is 2 and 3 tier architecture?
6.5.
What is the 2 tier architecture in JDBC?
7.
Conclusion
Last Updated: Jul 2, 2024
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Two-Tier Architecture

Author Malay Gain
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Prerita Agarwal
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23 Jul, 2024 @ 01:30 PM

Introduction

Two-tier architecture was developed in the 1980s from the file server software architecture design. This two-tier architecture is intended to improve usability by supporting a forms-based, user-friendly interface. The two-tier architecture improves scalability by accommodating up to 100 users. This architecture is mainly used in non-complex, non-time critical information processing systems.

Two-Tier Architecture

Now we will discuss this architecture in detail.

What is Two-Tier Architecture?

A two-tier system consists of a server and a client. In a two-tier system, the database is stored on the server, and the interface installed on the client is used to access the database.

 

The user system interface is generally located in the user's desktop and the database management services are generally in a server that is a more powerful machine that services many clients. Processing management is split between the user system interface environment and the database management server environment. The database management server provides stored procedures and triggers.

Example of Two-Tier DBMS Architecture

Client Layer

  • User Interface (UI): This layer includes applications that users interact with directly. For example, a web application used by employees to manage inventory in a retail store.
     
  • Database Client: It communicates with the database server to send queries and receive results. In our example, this could be SQL queries generated by the UI to fetch inventory details or update stock levels.

Server Layer

  • Database Server: This layer manages and stores the actual data. It responds to queries from the client, processes transactions, and maintains data integrity.
     
  • DBMS (Database Management System): The software responsible for managing the database on the server. Examples include MySQL, PostgreSQL, or Oracle Database.

 

Check this out,  Data Warehouse Architecture

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Characteristics of 2 Tier Architecture

  • Two-tier architectures consist of three components distributed in two layers - client and server. These components are 
    • 1) User system interface
    • 2) Processing management
    • 3)Database management.

 

  • Two-tier architecture allocates the user system interface exclusively to the client.

 

  • This architecture places database management on the server and splits the processing management between client and server, creating two layers. 

Advantages of 2 Tier Architecture

  • As processing is shared between the client and server, many users can interact with a two-tier architecture system.

 

  • The two-tier architecture improves scalability.

 

  • It also improves flexibility by allowing data to be shared within a homogenous environment.

 

  • The two-tier architecture requires minimal operator intervention.

 

Disadvantages of 2 Tier Architecture

  • The performance of this architecture degrades when the number of users increases. 
  • In this case, it is difficult to implement reliable security as users need to have login information for every database server. 

Frequently Asked Questions

What are the use cases of two-tier architecture?

Two-tier architectures are often used when the user requirements are moderately heavy, and the system is expected to have minimum interactions and maintenance.

What are some limitations of a two-tier architecture?

The major limitations of using two-tier architecture patterns for designing systems are:

  1. Since there is a separation between the server and the client in this type of architecture, the overhead and the cost of the maintenance of the system increase.
  2. As the number of users keep increasing in the system, the overall fault tolerance and reliability of the system reduces.

What is a 2 tier architecture?

A 2-tier architecture refers to a client-server architecture where the client interacts directly with the server. It consists of two main layers: the client or front-end and the server or back-end, typically used in simple applications where scalability and flexibility are less critical.

What is 2 and 3 tier architecture?

A 2-tier architecture involves a client directly communicating with a server, suitable for simpler applications. In contrast, a 3-tier architecture adds an intermediate application server layer between the client and server, enhancing scalability, separation of concerns, and facilitating distributed computing.

What is the 2 tier architecture in JDBC?

In JDBC (Java Database Connectivity), the 2-tier architecture involves direct communication between the Java application (client) and the database server (server). JDBC allows Java programs to interact with databases using SQL queries, managing connections, sending queries, and processing results directly through JDBC drivers installed on the client side.

Conclusion

In this article, we have covered two-tier architecture along with its characteristics.

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