The first time it connects to a PostgreSQL server or cluster, the port takes a constant photo of all schemas. Afterwards photo is complete, the adapter constantly captures row-level changes that put, upgrade, and remove database web content and that were committed to a PostgreSQL database. The adapter generates information transform occasion records and streams them to Kafka subjects. For each table, the default actions is that the adapter streams all produced events to a separate Kafka subject for that table. Applications and also services take in data change occasion documents from that subject.
In this circumstance, the adapter checks out from the database purchase log customarily yet hardly ever gives off modification records to Kafka. This means that no offset updates are devoted to Kafka as well as the adapter does not have a chance to send out the most recent recovered LSN to the data source. The database keeps WAL files that contain events that have actually already been processed by the port.
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As of release 12, PostgreSQL allows logical duplication ports only on primary servers. This suggests that you can point a Debezium PostgreSQL port to only the active key web server of a data source collection. Likewise, replication slots themselves are not circulated to replicas. If the main server drops, a new key have to be advertised.
The variety of milliseconds in between the last adjustment event’s timestamp as well as the connector processing it. The values will certainly incoporate any type of differences between the clocks on the equipments where the data source server as well as the adapter are running. When a port is configured this way, its actions when it begins is as follows.