On Fri, 2023-02-17 at 15:01 +0530, Karthik Krishnakumar wrote: > 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. Take 10 minutes downtime and use "pg_upgrade --link". Yours, Laurenz Albe
