Term Kind Topic What it is
Log Compaction concept CDC to Stream Retaining only the most recent value for each key in a topic, so the log becomes a durable snapshot of current state rather than a bounded window of history.
Replication Slot Retention Slot Lag, WAL Retention Pressure concept CDC to Stream The write-ahead log a database must keep because a change-data-capture consumer has not yet confirmed it, which turns a slow or stopped CDC pipeline into a disk-space failure on the primary database.
Transaction Log Stream concept CDC to Stream Change events derived from a database's write-ahead log — faithful to the table's mutations and to its internal model rather than to the business's.