Hi. We have a setup of 3 Postgres 9.2 nodes (1x master, 2x slaves) running on EC2 instances in AWS. We want to upgrade to 9.6 so we can move to Amazon RDS (it requires at least a 9.3.5 version <https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/CHAP_PostgreSQL.html> ). As far as I know, we have 3 options here:
1. From 9.2 on EC2 to RDS 1. pg_dump on 9.2 2. Restore it in RDS (might not work; haven't tested it) 2. Get Slony replication working 1. Setup slony in our 9.2 nodes. 2. Get a fresh Postgres installation running Postgres 9.6 3. Copy the database over (pg_basebackup) 4. Start the replication (master 9.2 --> slave 9.2 --> slave 9.6) 5. failover to 9.6 6. re-create slaves from 9.6 3. From 9.2 to 9.6 on EC2; then to RDS: 1. upgrade the master 9.2 to 9.6 2. re-create all slaves with 9.6 3. after a while (months/weeks), use DMS or pg_dump/pg_restore and go for RDS Because of downtime, *Step 2* seems more with what we wanna go forward. Questions are: - At the moment I am using native Postgres streaming replication with two slaves. Do I need to install Slony on my master, and get rid of the native tool? and then re-create the slaves with slony? - Slony or Bucardo are trigger-based replication solutions. That means DDL changes won't be propagated. This is not good as new tables can be added at any time. Isn't there a workaround for this? Thanks!