Need assistance with creating 11g clone

 Hello All,

I just configured a test host identical to my prod server. Oracle 11.1.07, Redhat 5.3 all 64 bit, same mount points as production. I copied over a cold backup from prod to test, db started up just fine. My DB size is 20GB, 200 datafiles, 215 tablespaces. The cold backup is 3 weeks old. I need to keep my test database up to date and while on-line. Production is in archivelog mode, the test server/db is in NOarchivelog mode. I use test as a test and read-only if needed. I would like to keep test updated by either full DB datapump