Implement CDC from OLTP to warehouse
WHAT IT TESTS: low-impact replication of inserts, updates, and deletes. OUTLINE: contrast log-based CDC with query-based timestamp polling, cover deletes and load on source, then pick log-based for minimal impact.
WHAT IT TESTS: whether you can replicate changes, especially deletes, without straining the source. ANSWER OUTLINE: compare query-based CDC (polling an updated_at column or diffing snapshots) against log-based CDC (reading the transaction log / WAL/binlog via tools like Debezium). Query-based is simple but adds query load and silently misses hard deletes; log-based captures all DML including deletes with near-zero source impact but is more complex to operate. Recommend log-based for minimal impact.
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- #cdc
- #data-replication
- #etl
- #transaction-log
- #data-warehouse
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