pgcopydb

Streams table data directly between servers using multiple processes, bypassing intermediate file writes and significantly speeding up large data transfers, as shown in the example output with 8 concurrent COPY jobs.

Creates all indexes for each table simultaneously after data copy, optimizing performance by reducing lock contention, implemented via CREATE UNIQUE INDEX followed by ALTER TABLE commands.

Supports Change Data Capture via PostgreSQL's logical decoding and wal2json, enabling zero-downtime migrations with the `pgcopydb clone --follow` command for replaying changes.

Uses PostgreSQL snapshots to ensure data consistency during the copy process, preventing issues from concurrent modifications, as demonstrated in the logs with exported snapshot IDs.