Re: In-order pg_dump (or in-order COPY TO)

On 8/26/25 12:43, Dimitrios Apostolou wrote:
> Hello list,
>
> I am storing dumps of a database (pg_dump custom format) in a de-
> duplicating backup server. Each dump is many terabytes in size, so
> deduplication is very important. And de-duplication itself is based on
> rolling checksums which is pretty flexible, it can compensate for blocks
> moving by some offset.
>
> Unfortunately after I did pg_restore to a new server, I notice that the
> dumps from the new server are not being de-duplicated, all blocks are
> considered new.

What are the pg_dump/pg_restore commands?

What are the Postgres versions involved?

Are they community versions of Postgres or something else?

What is the depduplication program?

> Thanks in advance,
> Dimitris
>
>

--
Adrian Klaver
adrian(dot)klaver(at)aklaver(dot)com