Example of Strong Consistency
Below is the example to understand the Strong Consistency:
- User 1 sends a write request to Node C to update Val1 to 100.
- Node C receives the request, updates the value to 100, and propagates the update to Nodes A, B and D.
- The response from Node C is sent back to User 1
- Now the User 2 immediately sends a read request to Node D to get the value of Val1.
- Since the system follows strong consistency, Node D has already received the update from Node C and reflects the latest value of Val1, which is 100.
- Node D responds to User 2 with the value 100.
Strong Consistency in System Design
Consistency in a system refers to the similarity and consistency of data and behavior across all its components. This ensures that users encounter the same version of the data and experience the expected system performance, regardless of which part of the system they interact with. Maintaining this uniform and reliable experience is vital for user satisfaction. Consistency in system design plays an important role in ensuring reliability, predictability, and correctness in software and hardware systems.
Important Topics for the Strong Consistency in System Design
- Importance of Data Consistency in Systems
- What is Strong Consistency?
- Characteristics of Strong Consistency
- Strong Consistency Comparison with Other Consistency Models
- Types of Strong Consistency
- Ways to achieve Strong Consistency
- Challenges with Strong Consistency
- Example of Strong Consistency
- Impact of Strong Consistency on System Performance, Scalability and Availability