How does single master replication work in PostgreSQL?
In Single-Master Replication (SMR), changes to table rows in a designated master database server are replicated to one or more replica servers. The replicated tables in the replica database are not permitted to accept any changes (except from the master). But even if they do, changes are not replicated back to the master server.
Can you use Azure database for PostgreSQL replication?
Cross-region replication can be helpful for scenarios like disaster recovery planning or bringing data closer to your users. Basic tier servers only support same-region replication. You can have a primary server in any Azure Database for PostgreSQL region.
Why does logical replication not replicate the values?
This is because logical replication does not replicate the values for sequences since the next value of the sequence is not stored in the table itself. If you think about it logically, you can’t modify the same “autoincrement” value from two places without bidirectional synchronization.
Is it possible to selectively replicate a part of a database?
One big “feature” of streaming replication is that it’s all or nothing. All changes to all objects from all databases on the primary have to be shipped to the standby, and the standby has to import every change. It is not possible to selectively replicate a part of your database.
When does automatic failover occur in PostgreSQL?
2. What Is Automatic Failover in PostgreSQL? Once physical streaming replication has been set up and configured in PostgreSQL, failover can take place if the primary server for the database fails.
What happens in the event of a master database failure?
Fault tolerance: In the event of master database server failure, the replica server can take over, since it already contains the master server’s data. In this configuration the replica server is also called the standby server. This configuration can also be used for regular maintenance of the primary server.
How does OLTP improve PostgreSQL database performance?
OLTP performance: Removing reporting query load from the online transaction processing (OLTP) system improves both reporting query time and transaction processing performance. Fault tolerance: In the event of master database server failure, the replica server can take over, since it already contains the master server’s data.