What are the different types of system Architecture? | System Design for Product Managers — Part 3
What is System Architecture? What are the different types of system architecture? What is layered architecture? The benefits of using a layered architecture
What is System Architecture?
As a product manager, it’s important to have a strong understanding of the different types of system architectures that exist. The system architecture is the way in which a system is structured, including its components, their relationships, and how they work together to achieve the system’s goals. In this response, we’ll discuss the three main types of system architectures: monolithic, client-server, and microservices.
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What are the different types of system architecture?
Monolithic Architecture
Monolithic architecture is the most traditional type of system architecture, where the entire application is built as a single unit. All the different components of the application, such as the user interface, application logic, and database, are combined into a single executable package. In a monolithic architecture, any changes to one component require rebuilding and redeploying the entire application. This can make it difficult to scale the system and can lead to long development cycles.
An example of a monolithic architecture is the early versions of the Microsoft Office suite, where all the different applications (such as Word, Excel, and PowerPoint) were packaged together as a single executable.
Client-Server Architecture
Client-server architecture is a type of system architecture where the system is divided into two main components: the client and the server. The client is the user-facing component of the system, while the server handles the business logic and data storage. Clients communicate with servers over a network, sending requests for data or actions to be performed.
In a client-server architecture, scaling can be done by adding more servers to handle increasing demand. This type of architecture is commonly used for web applications, where the client is a web browser and the server is a web server that serves up the application and responds to requests.
An example of a client-server architecture is the online shopping platform Amazon.com. The user interacts with the client (the website), which sends requests to the server to retrieve product information, process orders, and store user data.
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Microservices Architecture
Microservices architecture is a newer type of system architecture that has gained popularity in recent years. In this architecture, the system is broken down into a collection of small, independent services that communicate with each other through APIs. Each service is responsible for a specific business function and can be developed, deployed, and scaled independently.
Microservices architecture provides several benefits over monolithic and client-server architectures. It allows for easier scalability, faster development cycles, and better fault tolerance. However, it can also introduce additional complexity in terms of managing the interactions between services.
An example of a microservices architecture is the popular video streaming service Netflix. The system is broken down into a collection of microservices, each responsible for a specific function such as content delivery, recommendations, and user account management. These microservices communicate with each other through APIs, allowing for easier development and scaling.
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In conclusion, understanding the different types of system architectures is crucial for product managers. Each type of architecture has its own strengths and weaknesses, and choosing the right one for your system can have a big impact on its success. By considering factors such as scalability, development speed, and fault tolerance, product managers can make informed decisions about which architecture is best suited for their product.
What is layered architecture?
Layered architecture, also known as n-tier architecture, is a type of system architecture that is widely used in the design of complex software systems. The idea behind a layered architecture is to divide the system into logical layers, with each layer responsible for a specific set of functions. This helps to improve the overall scalability, flexibility, and maintainability of the system.
In a layered architecture, each layer has a specific role and interacts only with the adjacent layers. The layers are usually organized in a hierarchical manner, with the lowest layer being the closest to the system’s hardware, and the highest layer being the one that interacts with the user interface.
layers in a layered architecture
Presentation Layer
The presentation layer is responsible for handling the user interface (UI) of the system. It is the topmost layer in the architecture, and its main role is to present information to the user in a way that is easy to understand and interact with. The presentation layer includes components such as the user interface, input validation, and error handling.
Application Layer
The application layer is responsible for the system’s business logic. It receives requests from the presentation layer, processes them, and returns the results to the presentation layer. The application layer includes components such as workflow, validation, and computation.
Data Access Layer
The data access layer is responsible for interacting with the system’s data storage. It handles tasks such as retrieving and storing data, querying databases, and managing data relationships. The data access layer includes components such as data access objects (DAOs), object-relational mappers (ORMs), and data caches.
The benefits of using a layered architecture:
Modularity
A layered architecture promotes modularity by separating the different components of the system into distinct layers. This makes it easier to add new features or modify existing ones without affecting the rest of the system.
Scalability
A layered architecture allows for horizontal scalability, meaning additional servers can be added to handle the increased load. This is because each layer can be scaled independently of the others, depending on the needs of the system.
Maintainability
A layered architecture promotes maintainability by making it easier to locate and fix issues in the system. Because each layer has a specific role, it is easier to isolate issues and identify their root causes.
Flexibility
A layered architecture provides flexibility by allowing developers to easily switch out components within each layer. For example, if a more efficient database management system becomes available, the data access layer can be updated without affecting the rest of the system.