Convert / Migrate From Oracle 11gR2 To PostgreSQL ? On CentOS 5.7 x86_64

This has to do with my personal home environment.

I'm running Oracle 11gR2 DBMS with 4 instances using a single home
directory. For each of the instances I'm using LVM file systems with 10
logical volumes defined (/dbmsu00 used for the install and /dbmsu01 - u09
for the required files created using the DBCA utility). A single LISTENER
created using the NETCA utility.

I chose Oracle because back in the dark ages I was a Oracle DBA when
Oracle 7.3 was current. I've been told that it's OK to download and use
the Oracle DBMS in a noncommercial environment for a limited time - well
it's reached the end of that time. I can't use the free Oracle XE because
the database size limitations (4 GB).

Based upon what I've read and seen, the best choice for me is PostgreSQL
Community Edition. What I need is advice, documentation, and information
on how to take the above and move it from Oracle to PostgreSQL along with
updating my JBoss 6.0 environment so it has access to the PostgreSQL
databases/instances? Can someone supply me with some direction?

Thanks,
Gene Poole

+ It's impossible for everything to be true. +