idea for a backup system...

Hello,
I'm new to the list ,but I have a question on a use of postgresql. I
need to know if this is dumb idea.

I want to use postgresql to backup a web server. I could do a lo_import
on each and every file in the document root by writing a perl script.
Then when I wanted a file I can grab it with an sql statement. Is this
even close to a good idea? Of course, other things would need to be
worked out like backing up the database to tape. I think it would be a
pretty good idea, but I have been wrong before. Thanks for the help.

Robert