What software is necessary for RAC? Does it have a separate installation CD to order?
Real Application Clusters is an option of Oracle Database and therefore part of the Oracle Database CD. With Oracle 9i, RAC is part of Oracle9i Enterprise Edition. If you install 9i EE onto a cluster, and the Oracle Universal Installer (OUI) recognizes the cluster, you will be provided the option of installing RAC. Most UNIX platforms require an OSD installation for the necessary clusterware. For Intel platforms (Linux and Windows), Oracle provides the OSD software within the Oracle9i Enterprise Edition release. With Oracle Database 10g, RAC is an option of EE and available as part of SE. Oracle provides Oracle Clusterware on its own CD included in the database CD pack. Please check the certification matrix (Note 184875.1) or with the appropriate platform vendor for more information.