PostgreSQL Streaming Replication

In PostgreSQL, streaming replication works by replicating Write-Ahead Logs (WAL) from one master server to one or more slave servers.

Whenever the master server receives a write operation, it writes the changes to a WAL file. These changes are immediately replicated to the slaves through streaming replication.

Streaming replication is fully supported with PostgreSQL and is a common approach to implementing a fail-over database server that can be promoted to master in the event that the primary database server becomes unavailable.

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