From: Laurenz Albe <laurenz.albe@cybertec.at>
To: Karthik Krishnakumar <karthikk@zohocorp.com>
To: pgsql-admin <pgsql-admin@lists.postgresql.org>
Subject: Re: Upgrading postgres quickly, without downtime.
Date: Fri, 17 Feb 2023 13:13:32 +0100
Message-ID: <28454b4ba1d1cad92d6eb40e68265c728b0c830f.camel@cybertec.at> (raw)
In-Reply-To: <1865eb25ef2.12bfda8e286305.6340275209123460062@zohocorp.com>
References: <1865eb25ef2.12bfda8e286305.6340275209123460062@zohocorp.com>
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
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To: pgsql-admin@postgresql.org
Cc: laurenz.albe@cybertec.at, karthikk@zohocorp.com, pgsql-admin@lists.postgresql.org
Subject: Re: Upgrading postgres quickly, without downtime.
In-Reply-To: <28454b4ba1d1cad92d6eb40e68265c728b0c830f.camel@cybertec.at>
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