A DMS CDC task was paused and must resume without missing source changes.
The source database's change logs are confirmed to still be available.
What should be checked before resuming?
Confirm source-log retention and the task checkpoint or restart position before resuming CDC.
Detailed explanation
A full load may create duplicates and downtime when a checkpointed CDC restart would suffice.
A full load may create duplicates and downtime when a checkpointed CDC restart would suffice.
The required source changes must remain in the log and the task must resume from the last applied position.
The required source changes must remain in the log and the task must resume from the last applied position.
Deleting logs removes investigation information and does not restore the CDC position.
Deleting logs removes investigation information and does not restore the CDC position.
Website hosting has no relationship to a DMS change position or source-log retention.
Website hosting has no relationship to a DMS change position or source-log retention.
Check official documentation
Compare the following points with the official documentation.
AWS DMSのCDC開始位置、タスク再開、ソースログ要件の公式説明を確認する。
What to confirm
CDC再開の前提と、全量ロードを再実行する場合の影響を説明できる。
Key points
- DMS CDC
- Change log
- Restart position
- Checkpoint
Notes
- Environment: AWS公式DEA-C01試験ガイドと各サービスの公式ドキュメントの確認
- Confirm current AWS service behavior in the official DEA-C01 documentation.
Foundation review
Resume versus reload
A checkpointed CDC resume avoids the cost and duplication risk of an unnecessary full load.
Recovery path
If source logs have expired, a controlled resynchronization may be required.