Oracle 8i and 9i database customers face urgency to upgrade to Oracle 10g or 11g, particularly where more business-critical applications are supported. In many cases, cross-platform migrations may also need to occur along with the database upgrade. From a user's perspective, they expect no downtime. Further, SLAs (service level agreements) may dictate strict availability levels. Therefore any outage, even if scheduled or "planned," has a negative impact on the business. This paper presents a practical, proven solution that tackles the challenge of upgrading to newer Oracle database versions without taking database downtime. Key technology components used in this solution are GoldenGate Software for real-time heterogeneous data replication with bi-directional failback and Oracle's Cross Platform Transportable tablespace feature.

In this white paper, learn about a practical, proven solution for:

• Enabling a zero-downtime Oracle 8i or 9i database upgrade or migration to newer Oracle database versions
• Achieving a rolling upgrade or migration
• Keeping large volumes of transactions in synch across the databases
• Managing partial or phased migrations or upgrades
• Conducting data verification post-upgrade or migration
• Implementing a fail-back strategy