VMware under CentOS6.5 installation oracle11g RAC (1)

1 Preface

Describes the reader object and revision history of this document.

Reader Object

This document takes the Centos6.5 operating system as an example, and describes how to install a oracle11g R2 (RAC) database that uses virtual disks under VMware.

This document is mainly used for learning

Revision history

Modify the record to accumulate a description of each document update. The latest version of the document contains updates for all previous document versions.

Document Version 01 (2015-04-09)

Officially released for the first time.

Document Version 02 (2015-12-07)

Modify the document into a VMware environment for learning to use.

2 Background information

The company's business uses oracle11g RAC, although it was originally built, but after the business on-line, in order to reduce the risk, some maintenance operations still need to test the environment to verify, so think of using VMware to build Oracle 11g RAC to do the test environment.

About this chapter

This section focuses on the basic concepts, installation procedures, and considerations for installing the oracle11g R2 database.

Basic Concepts in 2.1 RAC

2.2 Installation process

2.3 Precautions

Basic Concepts in 2.1 RAC

This manual describes the installation of oracle11g R2 software in RAC-based ASM under the ibm+centos6.5 platform, with two nodes in the cluster. Before you install Oracle RAC+ASM, you may need to first briefly understand the concepts of RAC, ASM, and the installation process.

Rac

RAC is the abbreviation for real application clusters and is a component of the Oracle database. By using the Rac,oracle database, you can run any packaged or customized application across a set of clustered servers without any changes to those applications.

Asm

ASM, known as automated Storage Management, is an oracle-developed storage management software that replaces the LVM (Logical Volume Manager) provided by the operating system to manage storage and data files.

Before oracle10g this version, the management of a large database hundreds of thousands of data files for the database administrator is not a technical content and very boring work, which requires the database administrator to be familiar with some of the system of LVM knowledge, do disk planning, Related system aspects such as the stripe of LV.

Using ASM will greatly reduce this effort, and the database administrator only needs to manage a few disk groups. A disk group is a logical unit of ASM Management that consists of a set of disk devices. We can define a disk group as the default disk group for the database, and Oracle automatically manages the storage, including creating, deleting data files, and so on. Oracle automatically associates these files with an appropriate database object so that we can manage these objects only by providing the name of the object, rather than providing a detailed file name as before.

The "ASM instance" in this article refers to a database instance that uses ASM to manage data files.

2.2 Installation process

This section focuses on the installation process for oracle11g R2.

The IBM Platform Centos6.5 operating system RAC mode installs oracle11g R2, as shown in process 2-1.

Figure 2-1 Installation process

2.3 Precautions

This section focuses on the considerations for installing the oracle11g R2 database.

When installing, there are a few things to keep in mind:

L Make sure that the two machines meet the following requirements:

? The operating system is consistent.

? The database version is consistent.

Please pay special attention to the bold and italic sections when reading the documentation.

• When executing a command, pay attention to the prompt before the command.

? If "#", this command is executed as root user.

? If "$", it means that it is executed as an Oracle user or a grid user.

VMware under CentOS6.5 installation oracle11g RAC (1)