oracle-db-12cr1-rac-installation-on-oracle-linux-7-using-nf

Oracle Database 12c Release 1 (12.1.) RAC on Oracle Linux 7 Using NFS

This article describes the installation of Oracle Database 12c Release
2 (12.1 64-bit) RAC on Oracle Linux 7.1 64-bit using NFS to provide the
shared storage.
* [40]Introduction
* [41]Download Software
* [42]Operating System Installation
* [43]Oracle Installation Prerequisites
+ [44]Automatic Setup
+ [45]Manual Setup
+ [46]Additional Setup
* [47]Create Shared Disks
* [48]Install the Grid Infrastructure
* [49]Install the Database
* [50]Check the Status of the RAC
* [51]Direct NFS Client

Introduction

NFS is an abbreviation of Network File System, a platform independent
technology created by Sun Microsystems that allows shared access to
files stored on computers via an interface called the Virtual File
System (VFS) that runs on top of TCP/IP. Computers that share files are
considered NFS servers, while those that access shared files are
considered NFS clients. An individual computer can be either an NFS
server, a NFS client or both.

We can use NFS to provide shared storage for a RAC installation. In a
production environment we would expect the NFS server to be a NAS, but
for testing it can just as easily be another server, or even one of the
RAC nodes itself.

In this case, I'm doing the installations on VirtualBox VMs and the NFS
shares are on the host server. If you have access to a NAS or a third
server you can easily use that for the shared storage. Whichever route
you take, the fundamentals of the installation are the same.

The Single Client Access Name (SCAN) should really be defined in the
DNS or GNS and round-robin between one of 3 addresses, which are on the
same subnet as the public and virtual IPs. You can try to use a single
IP address in the "/etc/hosts" file, which it will cause the cluster
verification to fail, but it allows me to complete the install without
the presence of a DNS.

Assumptions. You need two machines available to act as your two RAC
nodes. They can be physical or virtual. In this case I'm using two
virtual machines called "ol7-121-rac1" and "ol7-121-rac2". If you want
a different naming convention or different IP addresses that's fine,
but make sure you stay consistent with how they are used.

Download Software

Download the following software.
* [52]Oracle 7.1
* [53]Oracle 12c Release 1 (12.1) Clusterware and Database software

Operating System Installation

This article uses Oracle Linux 7.1. A general pictorial guide to the
operating system installation can be found [54]here. More specifically,
it should be a server installation with a minimum of 2G swap
(preferably 3-4G), firewall disabled and SELinux set to permissive.
Oracle recommend a default server installation, but if you perform a
custom installation include the following package groups.
* Server with GUI
* Hardware Monitoring Utilities
* Large Systems Performance
* Network file system client
* Performance Tools
Source .... : https://oracle-base.com/articles/12c/oracle-db-12cr1-rac-installation-on-oracle-linux-7-using-nfs
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