eliaslevy commented on a change in pull request #6379: [FLINK-9637] Add public user documentation for state TTL feature URL: https://github.com/apache/flink/pull/6379#discussion_r205990622
########## File path: docs/dev/stream/state/state.md ########## @@ -266,6 +266,92 @@ a `ValueState`. Once the count reaches 2 it will emit the average and clear the we start over from `0`. Note that this would keep a different state value for each different input key if we had tuples with different values in the first field. +### State time-to-live (TTL) + +A time-to-live (TTL) can be assigned to the keyed state value. +In this case it will expire after the configured TTL +and its stored value will be cleaned up based on the best effort. +Depending on configuration, the expired state can become unavailable for read access +even if it is not cleaned up yet. In this case it behaves as if it does not exist any more. + +The collection types of state support TTL on entry level: +separate list elements and map entries expire independently. Review comment: The state collection types support per-entry TTLs: list elements and map entries expire independently. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org With regards, Apache Git Services
