Sync Checkpointing

A practical example

Example: a nightly CRM-to-platform sync of 50,000 contacts fails at record 31,000 due to a timeout.

With checkpointing, the retry continues from the last committed batch of 500; without it, the job restarts from zero and risks duplicating the 31,000 already written.

What to evaluate before investing

• Ask whether sync jobs persist progress and resume from the last committed batch.
• Check how already-written records are identified on retry to avoid duplicates.
• Confirm checkpoint granularity — per record, per batch — and whether it is configurable.

Limitations and tradeoffs

Tradeoff: frequent checkpoints slow the sync with extra writes, and resuming assumes source data has not changed mid-run — records edited between crash and resume may still need reconciliation.