Step By Step guide for installing Oracle RAC 11gR2 on Linux

Table of Contents

Oracle Database 11gR2 RAC on Linux Install Guide....................................................................................1

1. Introduction..............................................................................................................................................1

1.1. Overview of new concepts in 11gR2 Grid Infrastructure............................................................1

1.1.1. SCAN................................................................................................................................1

1.1.2. GNS...................................................................................................................................1

1.1.3. OCR and Voting on ASM storage.....................................................................................1

1.1.4. Passwordless automatic SSH connectivity........................................................................1

1.1.5. Intelligent Platform Management interface (IPMI)..........................................................1

1.2.3. IP Address Requirements..................................................................................................................3

1.2.4. Installation method............................................................................................................................3

2. *Prepare the cluster nodes for Oracle RAC.....................................................................................................4

2.1. User Accounts.......................................................................................................................................4

2.2. Networking...........................................................................................................................................4

2.3. Synchronizing the Time on ALL Nodes...............................................................................................6

2.4. Configuring Kernel Parameters............................................................................................................6

2.5. Set shell limits for the oracle user.........................................................................................................7

2.6. Create the Oracle Inventory Directory.................................................................................................7

2.7. Creating the Oracle Grid Infrastructure Home Directory.....................................................................8

3.1.1. Partition the Shared Disks.......................................................................................................10

3.1.2. Installing and Configuring ASMLib.......................................................................................11

3.1.3. Using ASMLib to Mark the Shared Disks as Candidate Disks...............................................12

4. Oracle Grid Infrastructure Install...................................................................................................................13

4.1. Basic Grid Infrastructure Install (without GNS and IPMI)................................................................13

5. Grid Infrastructure Home Patching................................................................................................................31

6. RDBMS Software Install...............................................................................................................................31

7. RAC Home Patching......................................................................................................................................43

8. Run ASMCA to create diskgroups................................................................................................................43

9. Run DBCA to create the database.................................................................................................................47

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1. Introduction

1.1. Overview of new concepts in 11gR2 Grid Infrastructure

1.1.1. SCAN

The single client access name (SCAN) is the address used by all clients connecting to the cluster. The SCAN

name is a domain name registered to three IP addresses, either in the domain name service (DNS) or the Grid

Naming Service (GNS). The SCAN name eliminates the need to change clients when nodes are added to or

removed from the cluster. Clients using SCAN names can also access the cluster using EZCONNECT.

allocated for the SCAN name. Allocate three addresses to the SCAN name. During Oracle grid infrastructure

In the past, the host and VIP names and addresses were defined in the DNS or locally in a hosts file. GNS can

simplify this setup by using DHCP. To use GNS, DHCP must be configured in the subdomain in which the

cluster resides.

1.1.3. OCR and Voting on ASM storage

The ability to use ASM diskgroups for Clusterware OCR and Voting disks is a new feature in the Oracle

Database 11g Release 2 Grid Infrastructure.If you choose this option and ASM is not yet configured, OUI

launches ASM configuration assistant to configure ASM and a diskgroup.

1.1.4. Passwordless automatic SSH connectivity

If SSH has not been configured prior the Installation, you can prompt the installer to this for you. The

configuration can be tested as well.

firmware compatible with IPMI version 1.5, which supports IPMI over LANs, and configured for remote

control.

recommends that you configure a dedicated network.

If you intend to use IPMI, then you must provide an administration account username and password to

provide when prompted during installation.

1.1.6. Time sync

and RDBMS could be installed either in same Oracle home or in separate Oracle homes)

1.1.8. Hangchecktimer and oprocd are replaced

Oracle Clusterware 11g release 2 (11.2) replaces the oprocd and Hangcheck processes with the cluster

synchronization service daemon Agent and Monitor to provide more accurate recognition of hangs and to

avoid false termination.

1.2. System Requirements

1.2.1. Hardware Requirements

-Physical memory (at least 1.5 gigabyte (GB) of RAM)

-An amount of swap space equal the amount of RAM

-Temporary space (at least 1 GB) available in /tmp

binary files for Oracle Clusterware and Oracle Automatic Storage Management (Oracle ASM) and their

associated log files, and at least 4 GB of available disk space for the Oracle Database home directory.

-Shared disk space

An Oracle RAC database is a shared everything database. All data files, control files, redo log files, and the

server parameter file (SPFILE) used by the Oracle RAC database must reside on shared storage that is

accessible by all the Oracle RAC database instances. The Oracle RAC installation that is described in this

guide uses Oracle ASM for the shared storage for Oracle Clusterware and Oracle Database files. The amount

of shared disk space is determined by the size of your database.

1.2.2. Network Hardware Requirements

-Each node has at least two network interface cards (NIC), or network adapters.

-Public interface names must be the same for all nodes. If the public interface on one node uses the network

-The network adapter for the public interface must support TCP/IP.

-The network adapter for the private interface must support the user datagram protocol (UDP) using

high-speed network adapters and a network switch that supports TCP/IP (Gigabit Ethernet or better).

-For the private network, the end points of all designated interconnect interfaces must be completely reachable

-A virtual IP address for each node

-Three single client access name (SCAN) addresses for the cluster

1.2.4. Installation method

2. *Prepare the cluster nodes for Oracle RAC

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2.1. User Accounts

1. Create OS groups using the command below Enter commands as the root user:

#/usr/sbin/groupadd -g 501 oinstall

#/usr/sbin/useradd -u 502 -g oinstall -G dba,asmdba oracle

3. Set the password for the oracle account using the following command. Replace password with your own

password.

Changing password for user oracle.

passwd: all authentication tokens updated successfully.

Changing password for user oracle.