About Control Files

About Control Files
A control file tracks the physical components of the database. It is the root file that the
database uses to find all the other files used by the database. Because of the
importance of the control file, Oracle recommends that the control file be multiplexed,
or have multiple identical copies. For databases created with Oracle Database
See Also:
■ "Viewing Database Storage Structure Information" on page 6-10
■ Oracle Database Concepts
About Database Storage Structures
Managing Database Storage Structures 6-3
Configuration Assistant (DBCA), three copies of the control file are automatically
created and kept synchronized with each other.
If any control file fails, then your database becomes unavailable. If you have a control
file copy, however, you can shut down your database and re-create the failed control
file from the copy, then restart your database. Another option is to delete the failed
control file from the CONTROL_FILES initialization parameter and restart your database
using the remaining control files.
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