BUG #16513: Postgresql HA Cluster

The following bug has been logged on the website:

Bug reference:      16513
Logged by:          Brajendra Pratap Singh
Email address:      singh.bpratap766@gmail.com
PostgreSQL version: 12.3
Operating system:   CentOS8
Description:

Hi ,

Is there any functionality present in postgresql for HA availability where
we can setup multiple nodes/instances in READ-WRITE mode for single database
so that incase of one node/instance failure we can use the 2nd one without
failure or in less time ,this is just like oracle RAC concept .

Please help us.