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By default, the new subscription will also copy any preexisting data in those tables but you can disable this using the Copy data clause. And that’s all that’s needed to get basic replication working. This creates a new subscription subscription1 which will start replicating tables that are part of the publication1 publication. Finally, click on the save button to create a subscription. You can specify the slot name of your choice, but if you choose not to it will default to a subscription name as slot name. Then you can specify some optional configuration settings, like whether you want to enable or disable the subscription or whether you want to create a slot or not. Next, specify the SSL configuration details if you wish to use SSL security for connection with the publisher server. You can subscribe to multiple publications. Then, specify the publications to get the data from. You can also define whether you want to go for SSL or standard connection to connect to the publisher server. You can define the subscription by giving the name and connection details. Not only that, but a publication can choose to limit the changes they publish to any combination of INSERT, UPDATE, DELETE, and TRUNCATE operations. Instead of publishing all the tables, we can also specify a certain set of tables to publish. You can define the publication by giving it a name and then specifying whether you want to publish the data of all the tables. You can create a publisher using a publication node. To use logical replication, you need to connect to the database and you will see two nodes-publication and subscription. How to use logical replication in pgAdmin 4 In a subscriber node, a subscription is created, which can subscribe to one or more publications.īut why logical replication? Well in traditional replication, the standby server is a bit for bit copy of the leader server but what if you want to copy only some data? Logical replication gives you that flexibility of what should be sent and where to send the data. In a publisher node, a publication is created, which is a set of changes from a table or a group of tables. Logical replication follows a publish and subscribe model.