Oracle Real Application Clusters (RAC) is a cluster database with a shared cache architecture that supports the transparent deployment of a single database across a pool of servers.  RAC is certified with both Oracle E-Business Suite Release 11i and 12.  We publish best-practices documentation for specific combinations of EBS + RAC versions.  For example, if you were planning on implementing RAC for EBS 12, you would use this documentation: Many of the largest E-Business Suite users in the world run RAC today, including Oracle; see this Oracle R12 case study for details. A number of customers have recently asked whether RAC One Node can be used with the E-Business Suite.  From the RAC website:
Oracle RAC One Node is a new option available with Oracle Database 11g Release 2. Oracle RAC One Node is a single instance of an Oracle RAC-enabled database running on one node in a cluster.
 
Diagram of RAC One Node database migration between nodes rac_one_node.png

RAC ONE Node is supported as a cold failover solution for E-Business Suite environments.  We don’t support live node migration; the E-Business Suite does not have code-level support for Fast Application Notification (FAN) events at present. 

Is there RAC One Node documentation for EBS environments?

No, we do not explicitly certify or document E-Business Suite configurations.  You can follow the generic RAC One Node documentation to implement this in E-Business Suite environments.  If you’re interested in using this technology with the E-Business Suite, you’re advised to run proof-of-concept tests prior to a production deployment to ensure that it meets your operational requirements.

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