[StreamBright]

> This is not true. Cassandra is row level atomic

http://cassandra.apache.org/doc/latest/faq/index.html#what-h...

"What happens if two updates are made with the same timestamp? Updates must be commutative, since they may arrive in different orders on different replicas. As long as Cassandra has a deterministic way to pick the winner (in a timestamp tie), the one selected is as valid as any other, and the specifics should be treated as an implementation detail. That said, in the case of a timestamp tie, Cassandra follows two rules: first, deletes take precedence over inserts/updates. Second, if there are two updates, the one with the lexically larger value is selected."

Does this sound to you as atomic? My expectation of atomic is that 2 things changing the same value are ordered and both executed. "lexically larger value is selected" does not qualify for me as atomic.