Software Architecture refers to the high-level structure and design of a software system. It defines how different components of the software are organized and how they interact with each other.
Just like a blueprint is needed to build a house, software also needs a blueprint before development begins—this blueprint is called software architecture.
Software Architecture = Structure + Design + Planning of a software system before coding.
Easier Development
A clear architecture provides a structured plan, making development easier.
Reduces Errors
Proper planning helps avoid major design mistakes later.
Better Performance
A good architecture ensures efficient and fast software performance.
Easy Maintenance and Updates
Well-designed architecture allows future modifications and upgrades easily.
Improved Security
Proper architectural planning helps protect the system from vulnerabilities.
Software architecture defines several important aspects of a system:
System Components (Modules)
Example modules: Login, Payment, Chat, Notification.
Communication Between Components
How modules interact using APIs, messaging systems, or data flow.
Data Storage
Where and how data will be stored (Databases, files, cloud storage).
Technologies and Tools
Programming languages and frameworks such as Java, Python, MySQL, or React.
All components of the software are combined into one large application.
Advantages
Simple to develop initially
Disadvantages
Difficult to update and scale when the system grows
Example
Early versions of platforms like Facebook.
The system is divided into multiple layers, such as:
UI Layer – User interface
Business Logic Layer – Application rules
Data Layer – Database management
Example
Most enterprise web applications.
Two main components:
Client → sends requests
Server → processes requests and sends responses
Example: A web browser like Google Chrome requesting data from a web server like Apache HTTP Server.
Large applications are broken into many small independent services, each performing a specific task.
Examples include platforms like Netflix, Amazon, and Uber.
Advantages
Highly scalable
Faster development and deployment
Disadvantages
More complex infrastructure and management
Different components communicate through events or messages.
Example:
When a user clicks “Add to Cart” on an e-commerce site, an event is triggered and the cart updates automatically.
Applications are built using multiple services that communicate over a network.
Example:
Large banking systems often use SOA to integrate different services like payments, accounts, and authentication.
Software Development Methodology (SDM) is a structured process used to plan, design, develop, test, and deliver software efficiently.
It provides rules, guidelines, and stages that help teams build software in an organized and systematic way.
SDM = Step-by-step process to build software efficiently and with good quality.