PostgreSQL 复制到 Amazon RDS

PostgreSQL 复制到 Amazon RDS 的实现方法

wal_level = logical
max_wal_senders = 10

sql
SELECT * FROM pg_create_logical_replication_slot('replication_slot_name', 'pgoutput');

rds.logical_replication = 1

sql
CREATE PUBLICATION publication_name FOR ALL TABLES;

sql
SELECT * FROM pg_create_logical_replication_slot('replication_slot_name', 'pgoutput');

sql
SELECT * FROM pg_stat_replication;

python
import psycopg2
# Connect to the source PostgreSQL database
source_conn = psycopg2.connect(
    host="source_host",
    port="source_port",
    database="source_database",
    user="source_user",
    password="source_password"
)
# Connect to the target Amazon RDS PostgreSQL database
target_conn = psycopg2.connect(
    host="target_host",
    port="target_port",
    database="target_database",
    user="target_user",
    password="target_password"
)
# Create a replication slot in the source database
source_cursor = source_conn.cursor()
source_cursor.execute("SELECT * FROM pg_create_logical_replication_slot('replication_slot_name', 'pgoutput')")
source_cursor.close()
# Create a logical replication stream in the target database
target_cursor = target_conn.cursor()
target_cursor.execute("CREATE PUBLICATION publication_name FOR ALL TABLES")
target_cursor.close()
# Start the replication process
target_cursor = target_conn.cursor()
target_cursor.execute("START_REPLICATION SLOT replication_slot_name")
target_cursor.close()
# Monitor the replication status
target_cursor = target_conn.cursor()
target_cursor.execute("SELECT * FROM pg_stat_replication")
replication_status = target_cursor.fetchall()
target_cursor.close()
# Close the connections
source_conn.close()
target_conn.close()