"Joseph M. Day" <jday@gisolutions.us> writes:
> It looks like pg_dump is the equivalent of a full backup, but
> how do I keep the equivalent of a Incremental, or Differential backup.
The only built-in mechanism for incremental backups at the moment is
archiving WAL logs via PITR. See
http://www.postgresql.org/docs/8.0/static/backup-online.html
> To keep the same functionality, I will need a full backup once a week,
> and a differential once a day.
You might consider rsync'ing the database, though I'm not sure what sort
of performance that will give.
regards, tom lane