Oracle Database Tips by Donald Burleson

Oracle10g Grid Computing with RAC
Chapter 15 - RAC Migration Topics

Introduction

In this chapter, we will cover migration related topics such as the conversion to RAC from a single instance database and configuring virtual IPs for RAC environments (required for 10g).

Migration to RAC Databases

In this section, we discuss the procedure to migrate from a standalone non-RAC database to a RAC database with multiple instances. There are many special requirements to migrate the current non-RAC database to a RAC database. We will examine these requirements and also discuss the appropriate environmental changes.

When should you not Migrate to RAC?

You should not convert to RAC if:

• You are not using a supported configuration of a cluster file system or shared disks (this can be determined via the MOSC site).
   

• Your application was specifically designed to not use cluster database processing, for example, if it was designed to always use a majority of data for all users.

What Will We Look At?

We will also look at the various combinations like migrating from a lower version of Oracle to Oracle 10g and then to a RAC environment, in-place migration where existing standalone Oracle Database 10g infrastructure is upgraded to a certified cluster environment, creating a new cluster environment and moving the data while converting from HA cluster environment to a RAC parallel database environment.

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