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What is PostgreSQL logical replication?
Logical replication is a method of replicating data objects and their changes, based upon their replication identity (usually a primary key). The subscriber applies the data in the same order as the publisher so that transactional consistency is guaranteed for publications within a single subscription.
How does replication work in Postgres?
Understanding replication in PostgreSQL Streaming replication in PostgreSQL works on log shipping. Every transaction in postgres is written to a transaction log called WAL (write-ahead log) to achieve durability. A slave uses these WAL segments to continuously replicate changes from its master.
What is Postgres subscription?
A subscription defines the connection to another database and set of publications (one or more) to which it wants to subscribe. The subscriber database behaves in the same way as any other PostgreSQL instance and can be used as a publisher for other databases by defining its own publications.
How to restart Postgres database?
The following steps restart the PostgreSQL server: In the Azure portal, select your Azure Database for PostgreSQL server. In the toolbar of the server’s Overview page, click Restart. Click Yes to confirm restarting the server. Observe that the server status changes to “Restarting”. Confirm server restart is successful.
How to backup and restore a PostgreSQL database?
Install PostgreSQL image. Run docker-compose up -d in the same directory as docker-compose.yml to download and run PostgreSQL and Adminer in the backend.
What are the benefits of using the Postgres database?
Benefits Performance and scalability. In larger database systems where data authentication and read/write speeds are essential, PostgreSQL is hard to beat. Concurrency support. Deep language support. Business continuity. 100% open source.
How to select database in PostgreSQL?
PostgreSQL allows selecting database in different ways. If we are using pgAdmin, we can just double click on the database and it will automatically select the database and will prompt for a password. If we are using psql command-line client we can use the following command.