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From: Heikki Linnakangas <hlinnaka@iki.fi>
To: Daniel Gustafsson <daniel@yesql.se>
To: Manuel Reyes Bravo <manuelreyesbravo@gmail.com>
Cc: Aleksander Alekseev <aleksander@tigerdata.com>
Cc: PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>
Cc: Masao Fujii <masao.fujii@gmail.com>
Subject: Re: pgsql: Revert online data checksum transitions
Date: Wed, 16 Sep 2026 17:08:29 +0300
Message-ID: <994b40a1-af72-45d9-bfd1-9f0f4b0e9715@iki.fi> (raw)
In-Reply-To: <0FF8445C-7912-4973-94B6-936B804AC840@yesql.se>
References: <CAHGQGwH-wHTq4xd2dedEj0niDHkezcCT_OLmMpGp9NEHW4Dvkw@mail.gmail.com>
	<1EEAFCFB-15DB-4EC1-BD49-964C799A01B2@yesql.se>
	<CAJ7c6TOJnA7V7gQXa6WpdNUwtjzH+2Dd6yW8mtMO-KttPWp4+w@mail.gmail.com>
	<C8AD0CF7-1B98-4AC2-B0F3-EC6702C81482@yesql.se>
	<CA+bCEdDj_Q2Fpkzm_OjUEDMrNhz1X6bsLcaDAepCaUVxT8SoZw@mail.gmail.com>
	<0FF8445C-7912-4973-94B6-936B804AC840@yesql.se>

On 16/09/2026 16:04, Daniel Gustafsson wrote:
>> On 16 Sep 2026, at 14:58, Manuel Reyes Bravo <manuelreyesbravo@gmail.com> wrote:
> 
>> The server itself is not at risk, since PG_CONTROL_VERSION was bumped
>> and 19.0 refuses a beta3 data directory; it is only tools reading
>> archived beta3 WAL that cannot tell the formats apart.  But the revert
>> of 0d3dba38c77 on this branch (01a80f06214) bumped the magic for the
>> same reason, so it looks like this one should too.
> 
> Thanks for the report, will include when fixing.

Also, the ControlFile->data_checksum_version_init is now never set.

- Heikki

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