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Date: Tue, 24 Jun 2025 08:48:53 -0700
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Subject: Re: pg_combinebackup failure
To: Kouber Saparev <kouber@gmail.com>
Cc: pgsql-general@postgresql.org
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From: Adrian Klaver <adrian.klaver@aklaver.com>
In-Reply-To: <CAN4RuQuWmhH3nSq+Lenz3hQqXmGyi=vnYkWDK3+-hA4r1KJ=kA@mail.gmail.com>
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On 6/24/25 08:38, Kouber Saparev wrote:
> Barman is involved indeed, its version is 3.14. The command: "barman 
> backup xxx --incremental latest".

I don't use Barman and I am still figuring out incremental backups, so 
what I say should be taken lightly.

 From here:

https://docs.pgbarman.org/release/3.14.1/user_guide/backup.html#block-level-incremental-backup

"Alternatively, you can use last-full or latest-full to reference the 
most recent eligible full backup in the catalog."

Not sure that latest by itself will work.

> 
> PostgreSQL is version 17.3.
> 
> На вт, 24.06.2025 г. в 18:26 Adrian Klaver <adrian.klaver@aklaver.com 
> <mailto:adrian.klaver@aklaver.com>> написа:
> 
>     On 6/24/25 02:31, Kouber Saparev wrote:
>      > Hello,
>      >
>      > We are trying to use pg_combinebackup but eventually it fails with:
> 
>     What is the command you are using to take the incremental backups?
> 
>     What version of Postgres are you taking the incremental backups from?
> 
>     Given the naming below, is Barman involved in this?
> 
>     If Barman is involved what version and what command is being used?
> 
>      >
>      > pg_combinebackup --debug --dry-run
>      > --output=/barman-backup/barman-data/test_combine
>     20250616T140003/data
>      > 20250617T090005/data
>      >
>      > ...
>      >
>      > pg_combinebackup: would copy
>      > "20250616T140003/data/base/16420/2136674204" to
>      > "/barman-backup/barman-data/test_combine/base/16420/2136674204"
>      > pg_combinebackup: would copy
>      > "20250616T140003/data/base/16420/2542449085" to
>      > "/barman-backup/barman-data/test_combine/base/16420/2542449085"
>      > pg_combinebackup: error: file
>      > "20250617T090005/data/base/16420/INCREMENTAL.4085177931.76" has
>      > truncation block length 9501840 in excess of segment size 131072
>      >
>      > Any idea what's wrong?
>      >
>      > --
>      > Kouber Saparev
> 
>     -- 
>     Adrian Klaver
>     adrian.klaver@aklaver.com <mailto:adrian.klaver@aklaver.com>
> 

-- 
Adrian Klaver
adrian.klaver@aklaver.com