Most software is also
very reliable, and the Oracle database protects the integrity of the data it holds even
in the event of software failure. However, hardware and software will fail occasionally.
The more components involved, the greater the likelihood of downtime at the
worst time.
The difference between inconvenience and disaster is often the presence or absence
of adequate recovery plans. This chapter should help you understand all of the
options available when deploying Oracle so youcan choose the best approach for
your site.
With Oracle, you can guarantee that your precious data is highly available by leveraging
built-in capabilities such as instance recovery or options such as Real Application
Clusters. However, equally important in deploying a high-availability solution is
the implementation of the appropriate procedures to safeguard your data. This chapter
covers these various aspects of high availability.
254 | Chapter 11: Oracle and High Availability
What Is High Availability?
Before we can begin a discussion of how to ensure a high level of availability for your
data, you need to understand the exact meaning of the term availability.
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