BACKFILL

Backfill. See Enterprise Integration Patterns.

Definition

Backfill — operation that replays or re-emits a batch of historical EDI messages to fill a gap discovered after the fact (outage, oversight, mapping break).

Origin

Practice documented in the data engineering literature (Stitch, Fivetran, Airbyte) and adapted to EDI: the output queue is filled with missed payloads over the window [T-7d, T].

Use

After detecting a broken mapping over 3 days, the EDI team triggers a backfill: source files are pulled back from the inbound SFTP, re-processed by the fixed version, dropped to partners with a 'backfill' marker to distinguish them from the normal flow.

Related

• REPLAYABILITY — see entry.
• IDEMPOTENCY — see entry.
• MAPPING — see entry.