Github user tillrohrmann commented on a diff in the pull request:
https://github.com/apache/flink/pull/1640#discussion_r52995595
--- Diff: docs/apis/streaming/fault_tolerance.md ---
@@ -176,6 +176,11 @@ state updates) of Flink coupled with bundled sinks:
<td></td>
</tr>
<tr>
+ <td>Cassandra sink</td>
+ <td>exactly once</td>
--- End diff --
I mean an at most once system will give you also exactly once processing
guarantees under the assumption that nothing fails.
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