Re: Backup

On Wed, Oct 16, 2024 at 3:37 PM Andy Hartman <hartman60home(at)gmail(dot)com>
wrote:

> I am very new to Postgres and have always worked in the mssql world. I'm
> looking for suggestions on DB backups. I currently have a DB used to store
> Historical information that has images it's currently around 100gig.
>
> I'm looking to take a monthly backup as I archive a month of data at a
> time. I am looking for it to be compressed and have a machine that has
> multiple cpu's and ample memory.
>
> Suggestions on things I can try ?
> I did a pg_dump using these parms
> --format=t --blobs lobarch
>
> it ran my device out of storage:
>
> pg_dump: error: could not write to output file: No space left on device
>
> I have 150gig free on my backup drive... can obviously add more
>
> looking for the quickest and smallest backup file output...
>
> Thanks again for help\suggestions
>

Step 1: redesign your DB to *NOT* use large objects. It's an old, slow and
unmaintained data type. The data type is what you should use.

Step 2: show us the "before" df output, the whole pg_dump command, and the
"after" df output when it fails. "du -c --max-depth=0 $PGDATA/base" also
very useful.

And tell us what version you're using.

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