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Bulk Import Platform

HLDAdvanced50 minData pipelines & analytics Reliability & recovery Consistency & transactions

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Choose the policy you would defend in a design review. Choices save as you go.

1.What should an import job pin?

Only the original filenameImmutable source version, mapping/schema version and tenant scopeWhichever file is most recently uploaded

2.How do retries avoid duplicate committed rows?

Advance checkpoints before writesGenerate unrelated row keys on each attemptCommit deterministic batch/row identities and progress atomically

3.What does cancellation promise for committed batches?

Stop future work under policy; already committed batches remain unless explicitly compensatedAutomatic global rollback in every designPretend the job never existed

Trade-offs, failure cases and tests

Explain a rejected alternative, a failure mode and how you would test the design. At least 80 characters for the completeness check.

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