Oracle 11gR2 introduces a multitude of new features and enhancements to the tech stack for the Oracle Clusterware. Among these include:
Oracle RAC one node
Clusterware resource modeling
Policy-based cluster and capacity management
Cluster time synchronization service
OCR and voting disks storage within Oracle ASM
Oracle Clusterware out-of-place upgrade
Zero downtime for patching Oracle Clusterware
Oracle database 11g R2 provides a new feature called Oracle Real Application Clusters One Node (Oracle RAC One Node). Oracle RAC One Node is a single instance of Oracle Real Application Clusters (Oracle RAC) that runs on the node in a cluster. The benefit of the RAC One Node option is that it allows you to consolidate many databases into one cluster without a lot of overhead, while also providing high availability benefits of failover protection, as well...