https://flink-gcp.github.io/flink-connector-gcp/1.0/docs/connectors/Recent content in Connectors on GCP Connectors for Apache FlinkHugoen-ushttps://flink-gcp.github.io/flink-connector-gcp/1.0/docs/connectors/delivery-guarantees/Mon, 01 Jan 0001 00:00:00 +0000https://flink-gcp.github.io/flink-connector-gcp/1.0/docs/connectors/delivery-guarantees/<h1 id="delivery-guarantees">Delivery Guarantees<a class="anchor" href="#delivery-guarantees">#</a></h1> <p>This page compares what a completed Flink checkpoint means for each sink and what can happen when Flink restores an earlier checkpoint.</p> <p>The short version is that flushing before a checkpoint makes data durable, but does not by itself prevent a restored job from writing the same record again. Only BigQuery currently has checkpoint-coordinated exactly-once write methods. Some other sinks can make a replay harmless when the record supplies a stable identity, but that is not the same contract as a general-purpose exactly-once sink.</p>