Stateful vs Stateless Architecture PDF

! ❗ 219 Stateful vs Stateless Architecture ** Stateful and Stateless architectures are two approaches to managing user information ** **...

! ❗ 219 Stateful vs Stateless Architecture ** Stateful and Stateless architectures are two approaches to managing user information ** ** ** * ** and data processing in software applications, particularly in web services and APIs. *** * * ** Stateful Architecture ** ** Definition: In a stateful architecture, the server retains information (or state) about the ** ** ** * client's session. * This state is used to remember previous interactions and respond accordingly in future * * * interactions. * ** Characteristics: ** ** Session Memory: The server remembers past session data, which influences its ** * * * responses to future requests. * ** Dependency on Context: The response to a request can depend on previous ** * interactions. * ** Example: An online banking application is a typical example of a stateful application. ** *** *** ** ** * Once you log in, the server maintains your session data (like authentication, your * *** *** *** *** *** interactions). *** This data influences how the server responds to your subsequent actions, such as *** *** displaying your account balance or transaction history. ** Pros: ** ** Personalized Interaction: Enables more personalized user experiences based ** * on previous interactions. * ** Easier to Manage Continuous Transactions: Convenient for transactions that ** * require multiple steps. * ** Cons: ** ** Resource Intensive: Maintaining state can consume more server resources. ** * * ** Scalability Challenges: Scaling a stateful application can be more complex due ** ** ** * to session data dependencies. *  ! ❗ *** Stateless Architecture * ** ** Definition: In a stateless architecture, each request from the client to the server must ** ** ** *** contain all the information needed to understand and complete the request. The *** * server doesn't rely on information from previous interactions. * ** Characteristics: ** *** No Session Memory: The server does not store any state about the client’s * ~~ ~~** ~~ ~~ session. *** Self-contained Requests: Each request is independent and must include all * ** * necessary data. * ** Example: RESTful APIs are a classic example of stateless architecture. ** *** *** ** ** Each HTTP request to a RESTful API contains all the information the server needs to process it (like user authentication, required data), and the response to each request *** *** doesn't depend on past requests. ~~ ~~ ** Pros: ** ** Simplicity and Scalability: Easier to scale as there is no need to maintain ** * ~~ session state. ~~ * ** Predictability: Each request is processed independently, making the system ** * * * more predictable and easier to debug. * ** Cons: ** ** Redundancy: Can lead to redundancy in data sent with each request. ** ** Potentially More Complex Requests: Clients may need to handle more ** complexities in preparing requests. ** Key Differences ** ** Session Memory: **  ** Stateful retains user session information, influencing future interactions, ** * * * * * whereas stateless treats each request as an isolated transaction, independent of * ** ** * * * previous requests. * ** Server Design: ** ** Stateful servers maintain state, making them more complex and resource- ** * * * * * intensive. * ** Stateless servers are simpler and more scalable. ** * * * * ** Use Cases: ** ** Stateful is suitable for applications requiring continuous user interactions and ** * personalization. * ** Stateless is ideal for services where each request can be processed independently, ** * like many web APIs. * ** Conclusion ** ** Stateful and stateless architectures offer different approaches to handling user sessions and ** ** ** * data processing. The choice between them depends on the specific requirements of the * application, such as the need for personalization, resource availability, and scalability. ** Stateful provides a more personalized user experience but at the cost of higher ** * ** ** ** complexity and resource usage, ** ** ** * * while stateless offers simplicity and scalability, suitable for distributed systems where * ** ** * * * * *** ** each request is independent. *