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How to set up master and slave replication on PostgreSQL?
You should now have a master and slave PostgreSQL server configured to communicate effectively. If you have an application that will be writing to and querying the databases, you could set up a load balancing scheme to always write to the master, but split the reads between the master and slave.
Can a Postgres server insert data into a slave?
As you can see, we are unable to insert data into the slave. This is because the data is only being transferred in one direction. In order to keep the databases consistent, postgres must make the slave read-only. You should now have a master and slave PostgreSQL server configured to communicate effectively.
Why is my PostgreSQL slave out of sync?
It still may happen that the slave would go out of sync with the master. Data corruption – neither hardware or software is without bugs and issues. Some problems with the disk drive may trigger data corruption on the slave. Some problems with the “vacuum” process may result in data being altered.
How does streaming replication work in PostgreSQL 12?
The above config was an example of PostgreSQL streaming replication running in an asynchronous mode, where all changes made to the Master node will be shipped to the Slave server as long as the Slave is up and running. PostgreSQL streaming replication is asynchronous by default.
How to install pgpool II on PostgreSQL servers in Master?
PGPool can run on same server along with PostgreSQL DB or on stand alone server (recommended). In this article we will install PGPool on stand alone server, but the only difference is connection ports on PGPool and PostgreSQL. We will install PGPool II 3.1 on PostgreSQL 9.1.
Can a DBA use pgpool out of the box?
But most DBAs have master/multi slave setup by the time they get to pgpool. So they are looking for automatic failover and load balancer, and pgpool offers it out of the box for existing master/multi slave environments.