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Data & Analytics · Advanced

Checkpointing

Persisting a streaming query's progress (offsets) and state to durable storage so it can recover after failure.

Definition

Combined with replayable sources and idempotent sinks, checkpoints give exactly-once guarantees. Sharing or deleting a checkpoint causes reprocessing or corruption.

Exam tip

Deleting a stream's checkpoint makes it start over and reprocess data.

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