What are the advantages and disadvantages of storing state data on the server?

Storing state on the server has its pros and cons:

Advantages:

• Centralized management of state, which simplifies synchronization between clients.
• Security: data is not stored on the client, reducing the risk of leaks.
• Ability to scale and back up data.

Disadvantages:

• Increased load on the server and network due to the need for constant data exchange.
• Response delays due to network requests.
• Complexity of implementing fault tolerance and scaling with a large number of users.

For example, in a web application, storing sessions on the server allows controlling access and updating the state, but requires an efficient mechanism for storing and clearing sessions to avoid overloading the server.