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FLINK CHECKPOINTING

• Ensures fault tolerance by saving operator flink_state periodically
• If a failure occurs, Flink restores state from the last successful checkpoint.
• Works with stateful functions that retain data across events.

Prerequisites for Checkpointing

prerequisite	usage	examples
Durable data sources	For replaying records	Kafka, RabbitMQ, Kinesis, etc.
State storage	saving checkpoint snapshots	HDFS, S3, Ceph, etc.

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References