Hi admins,
I have a number of pg servers(~100 (each with a couple of replicas, so 300 clusters in total), each with ~2TB data) that is running version 10.
I am planning on upgrading to PG 15 and looking for ways to get it done without downtime and quickly.
There seem to be a couple of ways to do this -
1. dump/restore or upgrade -> but this causes downtime.
2. logical replication/pglogical -> this is going to be slow, adds additional load on the master, and it isnt recommended to do DDL during time.
I do have daily backups of these databases.
Is there a way I can use these daily backups to upgrade to 15 and sync the changes for the day alone?
I can code in C/scripts, and know bit of internals and wanted to ask where to start on this.
I am also open to any alternate ideas.
thanks
karthik