Re: pg_dump custom format and pigz

Hello,

> You might add pigz as a post-processing step and disabling compression in pg_dump.

The problem with this solution is that it make it necessary to decompress the dump entirely before using pg_restore (or
didI miss a point ?)  
This is an issue as our uncompressed dumps may reach 3-500 GB...

A better way would be to have a configuration option to tell which compression tool should be used internally by
pg_dump.

best regards,

Marc Mamin








-----Original Message-----
From: pgsql-admin-owner@postgresql.org [mailto:pgsql-admin-owner@postgresql.org] On Behalf Of Tino Schwarze
Sent: Friday, October 23, 2009 3:11 PM
To: pgsql-admin@postgresql.org
Subject: Re: [ADMIN] pg_dump custom format and pigz

Hi Marc,

On Fri, Oct 23, 2009 at 02:48:58PM +0200, Marc Mamin wrote:

> I'm using pg_dump intensively, and until now using the plaintext
> format which allows me to pipe the output to pigz
> (http://zlib.net/pigz/) This is the fastest way I've found to generate compressed backups.
>
> (These backups are very rarely used)
>
> I would like to switch to the custom format in order to take advantage
> of the parallel restore enhancement, but this would force me to give
> pigz up, hence loosing performances with pg_dump.

> Is there a way to combine the custom format with pigz?

You might add pigz as a post-processing step and disabling compression in pg_dump.

HTH,

Tino.

--
"What we nourish flourishes." - "Was wir nähren erblüht."

www.lichtkreis-chemnitz.de
www.tisc.de

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