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From: Laurenz Albe <[email protected]>
To: Sameer Malve <[email protected]>
To: Tom Lane <[email protected]>
Cc: [email protected] <[email protected]>
Cc: Sameer Malve <[email protected]>
Subject: Re: RHEL certified repo provided PostgreSQL Major Version Upgrade.
Date: Thu, 10 Oct 2024 08:33:25 +0200
Message-ID: <[email protected]> (raw)
In-Reply-To: <CAEGp0dg7cm0E3AUNhOnEGNM2TYr3KDg8iqRMpRWu16zVmaTqpQ@mail.gmail.com>
References: <CAEGp0dgUL=j4ULDfGz4j=kbv2sAzP5dmp=Wem7cOknq8gyge4Q@mail.gmail.com>
	<[email protected]>
	<PH0PR14MB520943781088094A05AA3244FD7E2@PH0PR14MB5209.namprd14.prod.outlook.com>
	<CAEGp0dg7cm0E3AUNhOnEGNM2TYr3KDg8iqRMpRWu16zVmaTqpQ@mail.gmail.com>

On Thu, 2024-10-10 at 11:52 +0530, Sameer Malve wrote:
> I have few questions.
> 
> 1. As I have observed, the PostgreSQL upgrade package has only the lower
>    major version binaries. So what if I want to upgrade from PG 13 to PG 16?

That works just the same.

> 2. If upgrade fails then what are the rollback steps. Do you know if it is documented somewhere? 

If you didn't use the --link option of pg_upgrade, you can simply fall back to
the old cluster.

If you used --link, you will have to restore your backup (or promote a standby
server that you prepared for this eventuality).

See the pg_upgrade documentation.

Yours,
Laurenz Albe

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