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While the installation of the combined products is called Oracle Grid Infrastructure, Oracle Clusterware and Automatic Storage Manager remain separate products.After Oracle Grid Infrastructure is installed and configured on both nodes in the cluster, the next step will be to install the Oracle Real Application Clusters (Oracle RAC) software on both Oracle RAC nodes.The Oracle RAC software owner must also have the OSDBA group and the optional OSOPER group as secondary groups.Prior to Oracle Clusterware 11g Release 2, the only method available for assigning IP addresses to each of the Oracle RAC nodes was to have the network administrator manually assign static IP addresses in DNS — never to use DHCP.The Openfiler server will be configured to use this volume group for i SCSI based storage and will be used in our Oracle RAC 11g configuration to store the shared files required by Oracle Grid Infrastructure and the Oracle RAC database.With Oracle Grid Infrastructure 11g Release 2 (11.2), the Automatic Storage Management (ASM) and Oracle Clusterware software is packaged together in a single binary distribution and installed into a single home directory, which is referred to as the Grid Infrastructure home.GNS and DHCP are key elements to Oracle's new Grid Plug and Play (GPn P) feature that, as Oracle states, eliminates per-node configuration data and the need for explicit add and delete nodes steps.

For example, the shared Oracle Clusterware files (OCR and voting files) and all physical database files in this article will be set up on only one physical disk, while in practice that should be stored on multiple physical drives configured for increased performance and redundancy (i.e. In addition, each Linux node will only be configured with two network interfaces — one for the public network ().In addition to this guide, please see the following extensions to this article that describe how to add and remove nodes from the Oracle RAC.While this guide provides detailed instructions for successfully installing a complete Oracle RAC 11g system, it is by no means a substitute for the official Oracle documentation (see list below).The system will consist of a two node cluster, both running Linux (Cent OS 5.5 for x86_64), Oracle RAC 11g Release 2 for Linux x86_64, and ASMLib 2.0.All shared disk storage for Oracle RAC will be based on i SCSI using Openfiler release 2.3 x86_64 running on a third node (known in this article as the Network Storage Server).

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