Database Reference
In-Depth Information
This chapter begins your introduction to the information you
need to pass your Oracle Database 12
c
: Certified Professional
exam. Perhaps the main job of an Oracle DBA involves using
your knowledge to ensure that your database is always backed up and recoverable.
This might sound simple. However, the expertise needed to ensure that your backup and
recovery plan is effective is not easy to come by. This is one reason why the job of the DBA
is in high demand. With your passing of the Oracle Database 12
c
Administration II exam,
you will be able to present credentials to employers that indicate that you have a particular
set of knowledge that will permit you to protect their data.
There is a lot to cover in this chapter. From the basics of how Oracle works and how
that relates to backup and recovery, to configuring online redo log files and control file for
higher availability. Also in this chapter, we will discuss manually backing up your database
when it's in NOARCHIVELOG mode, and many more topics that you will want to know
as you prepare for your Oracle OCP exam.
Exam objectives are subject to change at any time without prior notice and
at Oracle's sole discretion. Please visit Oracle's Training and Certification
website (
http://www.oracle.com/education/certification/
) for the
most current exam-objectives listing.
Oracle Database Data Protection Options
There are a number of things to consider with respect to backup and recovery. There are
different kinds of failures, different types of backups, and different tools that can be used
to back up and restore an Oracle Database. In this section, we will look at the various
Oracle Data protection options that are available to the DBA.
What Kind of Failures Can Happen to a Database
There are literally numberless combinations of things that can go wrong with an Oracle
database. Like any technology, there are always opportunities for failure. Throughout
this topic you will see a number of examples of these types of failures. The most common
failures include:
Physical failures - This includes the loss of disk drives, controller cards, memory, or even
the server itself.
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