From: Karthik Krishnakumar <karthikk@zohocorp.com>
To: pgsql-admin <pgsql-admin@lists.postgresql.org>
Subject: Upgrading postgres quickly, without downtime.
Date: Fri, 17 Feb 2023 15:01:35 +0530
Message-ID: <1865eb25ef2.12bfda8e286305.6340275209123460062@zohocorp.com> (raw)
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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Reply to all the recipients using the --to and --cc options:
reply via email
To: pgsql-admin@postgresql.org
Cc: karthikk@zohocorp.com, pgsql-admin@lists.postgresql.org
Subject: Re: Upgrading postgres quickly, without downtime.
In-Reply-To: <1865eb25ef2.12bfda8e286305.6340275209123460062@zohocorp.com>
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
This inbox is served by DDX for PostgreSQL; see mirroring instructions
for how to clone and mirror all data and code used for this inbox