Strong Consistency
“Always all data is to have integrity”
Eventual Consistency
This ensures all read operations retrieves updated data at the end.
Master Node + Read replica
| Index | Strong Consistency | Eventual Consistency |
|---|---|---|
| Pros | Data consistency and integrity | Scalability, Performance |
| Cons | Scalability, Performance | Weak consistency and integrity |
| When To Use | Small data </br>context is specific | Large data</br>context is general |
| Example use-case | Payment transaction | Likes on instagram picture |
What developers have to decide?
Always consider ‘user-centered’ perspective, Does it affect on user experience?