Definition
Replicas may briefly disagree after a write, but with no new writes they all converge to the same value.
How it works
The price of high availability and low latency in an AP store: a read right after a write might return a stale value from a lagging replica. Good enough for likes, feeds and counters; not for bank balances. Read-your-writes and monotonic-read sessions soften the rough edges.
Common questions
What is Eventual Consistency?
Replicas may briefly disagree after a write, but with no new writes they all converge to the same value.
How does Eventual Consistency work?
The price of high availability and low latency in an AP store: a read right after a write might return a stale value from a lagging replica. Good enough for likes, feeds and counters; not for bank balances. Read-your-writes and monotonic-read sessions soften the rough edges.
What is Eventual Consistency used for in system design?
The price of high availability and low latency in an AP store: a read right after a write might return a stale value from a lagging replica. Good enough for likes, feeds and counters; not for bank balances. Read-your-writes and monotonic-read sessions soften the rough edges.