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  Add a Node to an Existing Oracle RAC 11g R2 Cluster on Linux - (RHEL 5.5) — (27-April-2012)

As your organization grows, so too does your need for more application and 
database resources to support the company's IT systems. Oracle RAC 11g provides 
a scalable framework which allows DBA's to effortlessly extend the database 
tier to support this increased demand. As the number of users and transactions 
increase, additional Oracle instances can be added to the Oracle database 
cluster to distribute the extra load.

The following guide is an extension to my article "Building an Inexpensive 
Oracle RAC 11g R2 on Linux - (RHEL 5.5)":

Add a Node to an Existing Oracle RAC 11g R2 Cluster on Linux - (RHEL 5.5)

The original article that describes the existing Oracle RAC can be found at:

http://www.idevelopment.info/data/Oracle/DBA_tips/Oracle11gRAC/CLUSTER_12.shtml

Contained in this new guide are the steps required to add a single node to an 
already running and configured two-node Oracle RAC 11g Release 2 for Linux 
x86_64 environment on the CentOS 5.5 for x86_64 platform. All shared disk 
storage for Oracle RAC is based on iSCSI using Openfiler release 2.3 x86_64 
running on a separate node (known in this article as the Network Storage 
Server). Although this article was written and tested on CentOS 5 Linux, it 
should work unchanged with Red Hat Enterprise Linux 5 or Oracle Linux 5. 

----------------------------
Jeffrey M. Hunter, OCP
Sr. Database Administrator
jhunter@idevelopment.info
http://www.idevelopment.info
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