大多数人都知道Streaming Replication已经成为PostgreSQL的一部分,并且通常用于高可用性和读写分离,流复制是基于WAL日志的物理复制,适用于整个数据库实例的复制,并且备库是只读的。 Logical Replication属于逻辑复制,适用于数据库实例的部分(单个数据库或者某些表)的复制,目前只支持表复制。 最大的不同就是可以向下游节点...
00:00:00 postgres:postgrespeiybdb[local]idlepostgres=#select*frompg_stat_activity;datid|datname|pid|usesysid|usename|application_name|client_addr|client_hostname|client_port|backend_start|xact_start|query_start|state_change|wait_event_type|wait_event|state|backend_xid|backend_xmin|query|backend_...
00:00:00 postgres: bgworker: logical replication launcher # subscription [yangjie@young-2 ~]$ ps -ef | grep postgres yangjie 9222 1 0 Nov23 pts/1 00:00:01 /opt/pgsql/pg101-2/bin/postgres -D ../data yangjie 9224 9222 0 Nov23 ? 00:00:00 postgres: checkpointer process yangjie 9...
In this post we'll explore the basics of logical replication between two Postgres databases as both a user and a developer. Background Postgres first implemented physical replication where it shipped bytes on disk from one database A to another database B. Database B would write those bytes ...
CREATE TABLE postgres=# create subscription testsub1 connection 'hostaddr=172.18.10.16 port=5432 user=postgres dbname=d2' publication testpub1 with (enabled, create_slot, slot_name='sub1_from_pub1'); NOTICE: created replication slot "sub1_from_pub1" on publisher ...
logical_ddl | subscribe_tablelist_id_seq | sequence | postgres (9 rows) 使用 在使用logical_ddl来完成DDL的发布之前,需要先搭建好PostgreSQL的逻辑复制,发布和订阅需要创建好,需要发布的表要先在订阅端创建好, 1.发布端 在需要发布的业务库中create extension ...
postgres=# SELECT * FROM pg_replication_slots;(0 rows)复制代码 postgres=# \x Expanded display ...
Logical replication of tables in schema in PostgreSQL 15Allow publication content to be filtered using a WHERE clauseUp to Fujitsu Enterprise Postgres 14, it was not possible to filter rows with WHERE clause in the CREATE PUBLICATION. Publishing all rows of a table may have adverse effect on ...
select pglogical.create_node( node_name := 'provider1', dsn := ' host=myProviderServer.postgres.database.azure.com port=5432 dbname=myDB user=myUser password=<password>'); Create a replication set. SQL Sao chép select pglogical.create_replication_set('myreplicationset'); Add all tab...
aws-region.rds.amazonaws.com --port=5432 --username=postgres --password --dbname=labdb Verify that logical replication has been enabled by using the following command. labdb=> SHOW rds.logical_replication; rds.logical_replication --- on (1 row) Verify that the wal_level is s...