Are DynamoDB conditional writes strongly consistent?

Question

Suppose that a given table already contains the following key value pair: "abc" => { i: 1, v: "foo" } Then, two clients issue conflicting concurrent conditional writes. Client 1 writes: "abc" => { i: 2, v: "bar1" } if i == 1 Client 2 writes: "abc" => { i: 2, v: "bar2" } if i == 1 Then, is it guaranteed that at most one client's write operation will succeed?

Accepted Answer

Yes, that's exactly the use case they're designed for. You can see an example in the docs.

Are DynamoDB conditional writes strongly consistent?

Solution

Problem