Atomic consistency, also known as linearizability, is a strong consistency model in distributed systems. It ensures that all operations appear to take place instantaneously and in a single, globally agreed-upon order. This means that once a write operation completes, all subsequent read operations will see the value of that write or the value of a later write, maintaining a real-time order of operations.
Here are the key points about atomic (or linearizable) consistency:
Single Operation, Single Object: Linearizability applies to individual operations on single objects. It does not involve transactions that span multiple objects or operations.
Real-Time Order: Operations are ordered based on real-time constraints. If operation A completes before operation B starts, then B must logically take effect after A. This ensures that the system's state is consistent with the real-time order of operations.
Atomicity: Each operation appears to occur instantaneously at some point between its start and end times. This atomicity ensures that there are no intermediate states visible to other operations.
Strong Consistency: Linearizability is considered one of the strongest forms of consistency. It guarantees that all nodes in a distributed system have the same view of the data at any given time, immediately reflecting the most recent write.
Composability: If operations on each object in a system are linearizable, then all operations in the system are linearizable. This property makes linearizability composable across multiple objects.
In summary, atomic consistency (linearizability) ensures that all operations on ...
