oracle-db-12cr2-rac-installation-on-oracle-linux-6-using-virtualbo

oracle-db-12cr2-rac-installation-on-oracle-linux-6-using-virtualbo
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Oracle Database 12c Release 2 (12.2) RAC On Oracle Linux 6 Using VirtualBox

This article describes the installation of Oracle Database 12c Release
2 (12.2 64-bit) RAC on Linux (Oracle Linux 6 64-bit) using VirtualBox
(5.1) with no additional shared disk devices.
* [44]Introduction
* [45]Download Software
* [46]VirtualBox Installation
* [47]VirtualBox Network Setup
* [48]Virtual Machine Setup
* [49]Guest Operating System Installation
* [50]Oracle Installation Prerequisites
+ [51]Automatic Setup
+ [52]Manual Setup
+ [53]Additional Setup
* [54]Install Guest Additions
* [55]Create Shared Disks
* [56]Clone the Virtual Machine
* [57]Install the Grid Infrastructure
* [58]Install the Database Software
* [59]Create a Database
* [60]Check the Status of the RAC

Related articles.
* [61]All RAC Articles
* [62]Oracle Database 12c Release 2 (12.2) RAC On Oracle Linux 7
Using VirtualBox

Introduction

One of the biggest obstacles preventing people from setting up test RAC
environments is the requirement for shared storage. In a production
environment, shared storage is often provided by a SAN or high-end NAS
device, but both of these options are very expensive when all you want
to do is get some experience installing and using RAC. A cheaper
alternative is to use virtualization to fake the shared storage.

Using VirtualBox you can run multiple Virtual Machines (VMs) on a
single server, allowing you to run both RAC nodes on a single machine.
In addition, it allows you to set up shared virtual disks, overcoming
the obstacle of expensive shared storage.

Virtual RAC

Before you launch into this installation, here are a few things to
consider.
* The finished system includes the host operating system, two guest
operating systems, two sets of Oracle Grid Infrastructure
(Clusterware + ASM) and two Database instances all on a single
server. As you can imagine, this requires a significant amount of
disk space, CPU and memory.
* Following on from the last point, the VMs will each need at least
4G of RAM, preferably more if you don't want the VMs to swap like
crazy. Don't assume you will be able to run this on a small PC or
laptop. You won't.
* This procedure provides a bare bones installation to get the RAC
working. There is no redundancy in the Grid Infrastructure
installation or the ASM installation. To add this, simply create
double the amount of shared disks and select the "Normal"
redundancy option when it is offered. Of course, this will take
more disk space.
* During the virtual disk creation, I always choose not to
preallocate the disk space. This makes virtual disk access slower
during the installation, but saves on wasted disk space. The shared
disks must have their space preallocated.
* This is not, and should not be considered, a production-ready
system. It's simply to allow you to get used to installing and
using RAC.
Source .... : https://oracle-base.com/articles/12c/oracle-db-12cr2-rac-installation-on-oracle-linux-6-using-virtualbox
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