Oracle Real Application Clusters (RAC) is an option for Oracle Databases. It is a cluster database with a shared cache architecture that increases scalability and availability. Oracle RAC support is included in the Oracle Database Standard Edition and is an extra cost option for Enterprise Edition.
We are using 4 node Oracle 10GR2 RAC in Windows x64. 3 instances of our database crashed today and later started normally. I started them by connecting (Remote Desktop) to individual instances and ...