Oracle database: An Oracle database consists of
files.
· Sometimes these are referred to
as operating system files, but they are actually database files that store the
database information that a firm or organization needs in order to
operate.
· The redo log files are used to recover
the database in the event of application program failures, instance failures
and other minor failures.
· The archived redo log files are used to
recover the database if a disk fails.
· Other files not shown in the
figure include:
o The required parameter file that is used to specify parameters
for configuring an Oracle instance when it starts up.
o The optional password file authenticates special users of the
database – these are termed privileged users and include database
administrators.
o Alert and Trace Log Files – these files store
information about errors and actions taken that affect the configuration of the
database.
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