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 10gR2 Clusterware to Oracle 11gR1
Upgrading to Oracle 11gR2 Clusterware
Downgrading Oracle Clusterware after 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 an upgrade, it is very important that we are aware of the negative aspects of not upgrading.
It is not mandatory to upgrade an existing environment when a new version is released; however, there are many circumstances that may prompt you to consider...