This chapter focuses on installing the Oracle Grid Infrastructure, which includes preparing the hardware, storage, and networking layer components for clustering, along with the cluster software install. The Oracle Grid Infrastructure must be installed and running before you install the RDBMS software. Figure 4-1 shows the installation process for the Oracle 11g RAC. The term Grid Infrastructure is new in Oracle 11g Release 2 and meant for Oracle Clusterware and ASM. This was known as Oracle Clusterware in Oracle 11g Release 1 and earlier versions.