Oracle Database Migration Assistant for Unicode:
Near-Zero Downtime Migration Model
Updated: October 2011
For mission-critical production systems, limiting the migration downtime window requirement to a minimum is always a top consideration. The DMU presentation at Oracle OpenWorld 2011 – "Near-Zero Downtime Unicode Migration with Oracle Database Migration Assistant for Unicode" – introduces a mechanism to achieve near-zero downtime migration by leveraging Oracle DMU and Streams technology. Below are the links to the presentation and a separate step-by-step document that illustrates the procedure in more details along with proof-of-concept sample scripts.