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Oracle10g Grid Computing with RAC
Chapter 15 - RAC Migration Topics

Migration Methodology

There are many types of migration paths. Figure 15.1 shows the two main ones.

Figure 15.1 Main procedures to migrate to Oracle Database 10g RAC

The first procedure involves using the existing hardware infrastructure. To use existing hardware, we would add additional servers (nodes) to our environment and form the cluster. Obviously, the availability of Shared Storage is an important piece of the RAC architecture since without it utilization of RAC is not possible.

Requirements for Conversion

Your system must meet the following hardware and software requirements to convert to RAC:

  • Be able to run a cluster file system.

  • Have the required additional license(s) for Oracle Database 10g Enterprise Edition with RAC.

  • Have at least two network interface cards of at least 100 mbit/sec (preferably gigabit or better) communication speed. One for the public and Virtual private interface and the other for the RAC cluster interconnect.

  • Have shared disk storage.

Let's examine the conversion from a single-instance to clustered configuration first.

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The above text is an excerpt from "Oracle 10g Grid & Real Application Clusters", by Rampant TechPress.  Written by top Oracle experts, Mike Ault and Madhu Tumma, this book has a complete online code depot with ready to use scripts. 

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