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Oracle 11g R1/R2 Real Application Clusters Essentials by Syed Jaffer Hussain, Ben Prusinski

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Chapter 9. Oracle 11g Clusterware Upgrade

The first thing that probably comes into your mind whenever Oracle launches a new version of Clusterware is whether or not to upgrade the existing environment. In this chapter, we will look at some of the key factors that should be taken into account when considering an upgrade or when deciding against an upgrade.

In summary, we will discuss the following topics:

  • Overview of an upgrade
  • Upgrading Oracle 10g R2 Clusterware to Oracle 11g R1
  • Upgrading to Oracle 11g R2 Clusterware
  • Downgrading Oracle Clusterware after an upgrade

Overview of an upgrade

If we decide to welcome an upgrade, then we can potentially have many exciting new features that may be useful for our applications. At the same time, if we decide against ...

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