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From: Kirill Reshke <[email protected]>
To: Andrey Borodin <[email protected]>
Cc: Tom Lane <[email protected]>
Cc: Konstantin Osipov <[email protected]>
Cc: Greg Sabino Mullane <[email protected]>
Cc: Nikolay Samokhvalov <[email protected]>
Cc: PostgreSQL Hackers <[email protected]>
Subject: Re: Built-in Raft replication
Date: Wed, 16 Apr 2025 10:39:07 +0500
Message-ID: <CALdSSPhmEUT+2Wg7SMa3gnOetNiugtbd43pXDmcWJnfZti4LqA@mail.gmail.com> (raw)
In-Reply-To: <[email protected]>
References: <Z_1Cq7JvabsFYjQo@ark>
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	<CAM527d9+eGvdih1GxoPDJ2WYs6eitf39oNTxGxnCK1PgF=A8wg@mail.gmail.com>
	<[email protected]>
	<[email protected]>
	<[email protected]>
	<[email protected]>

On Wed, 16 Apr 2025 at 10:25, Andrey Borodin <[email protected]> wrote:
>
> I think I can provide some reasons why it cannot be neither extension, nor any part running within postmaster reign.
>
> 1. When joining cluster, there’s not PGDATA to run postmaster on top of it.

You can join the cluster on pg_basebackup of its master; So I dont get
why this is an anti-extension restriction.

> 2. After failover, old Primary node must rejoin cluster by running pg_rewind and following timeline switch.

You can run bash from extension, what's the point?

> The system in hand must be able to manipulate with PGDATA without starting Postgres.

-- 
Best regards,
Kirill Reshke





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