Re: pg_dump additional options for performance

On Fri, 2008-02-08 at 17:01 -0300, Alvaro Herrera wrote:
> Decibel! wrote:
> 
> > For that matter, it'd be better if you could just get all 3 files (pre,
> > data, post) in one shot with one transaction; that would guarantee you a
> > clean dump.
> 
> +1.

OK, that seems possible.

What do you think the syntax should be for that?

If you specify --data-only you get 1 file
If you specify --schema-only you get either 1 or 2 files
and if you don't specify either you get either 1 or 3 files

How do we name the files?

--pre-schema-file
--data-file
--post-schema-file

If any of the above 3 files are named then --file is treated as an
error.

That allows you to do this:

* dump all 3 files in one go

pg_dump --pre-schema-file=pre_schema.dmp --data-file=data.dmp
--post-schema-file=post_schema.dmp

* dump 2 files for schema

pg_dump --pre-schema-file=pre_schema.dmp
--post-schema-file=post_schema.dmp --schema-only

--  Simon Riggs 2ndQuadrant  http://www.2ndQuadrant.com