Postgres Backup guide

if you use pg_dump ppp > xxx.tar, then you get error, use standard format for big databases.


references:

[1] http://sparcki.blogspot.com/2010/11/copias-de-seguridad-y-recuperacion-en.html

[2] http://www.rolandovera.com/2008/07/09/forma-correcta-de-sacar-un-respaldo-backup-en-postgresql/