RE: PostgreSQL Timeline Issue After Switchover with Pacemaker

Thanks, Laurenz Albe.

I found an article that explains a similar situation to the one I faced.
https://www.alibabacloud.com/blog/how-to-avoid-timeline-errors-during-database-switchover-based-on-asynchronous-streaming-replication_597819

-----Original Message-----
From: Laurenz Albe <laurenz(dot)albe(at)cybertec(dot)at>
Sent: Friday, January 31, 2025 3:37 PM
To: di(dot)liu(at)japannext(dot)co(dot)jp; pgsql-admin(at)lists(dot)postgresql(dot)org
Subject: Re: PostgreSQL Timeline Issue After Switchover with Pacemaker

On Fri, 2025-01-31 at 09:09 +0900, di(dot)liu(at)japannext(dot)co(dot)jp wrote:
> Why, after a full backup restore, did the standby still look for the wrong timeline?
> Is there a file or setting that records the timeline information?

It is hard to say what exactly happened, since I don't know your exact setup, but very likely a standby server got promoted, started a new timeline 8 and archived the corresponding history file. But somehow the rest of the cluster didn't follow that promotion. Now upon every restore attempt, the history file gets fetched from the WAL archive and causes confusion.

Yours,
Laurenz Albe

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