DBA Tips Archive for Oracle


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by Michael New, MichaelNew@earthlink.net, Gradation LLC

The Standby Database feature of Oracle (Oracle7 and higher) allows the DBA to maintain a duplicate, or standby, copy of a database at a remote site to provide continued primary database availability in the event of failure. The standby database is created with a special copy of the control file from the primary database. The standby database is kept in close synchronization with the primary database by applying the primary database's archived log files to the standby database. It is therefore necessary to operate the primary database in Archivelog Mode to avail the benefit of a standby database.

A standby database is generally used where high availability of data is required. A standby database is one way of quickly providing access to data if the primary database fails and recovery will take longer than the desired time.

For instructions on how to activate a standby database in Oracle9i, please refer to the "Role Transitions" section in the appropriate article for your Data Guard configuration:

  Data Guard Configuration Example - (Oracle 9i, Physical, Maximum Performance Mode)

About the Author

Jeffrey Hunter is an Oracle Certified Professional, Java Development Certified Professional, Author, and an Oracle ACE. Jeff currently works as a Senior Database Administrator for The DBA Zone, Inc. located in Pittsburgh, Pennsylvania. His work includes advanced performance tuning, Java and PL/SQL programming, developing high availability solutions, capacity planning, database security, and physical / logical database design in a UNIX / Linux server environment. Jeff's other interests include mathematical encryption theory, tutoring advanced mathematics, programming language processors (compilers and interpreters) in Java and C, LDAP, writing web-based database administration tools, and of course Linux. He has been a Sr. Database Administrator and Software Engineer for over 20 years and maintains his own website site at: http://www.iDevelopment.info. Jeff graduated from Stanislaus State University in Turlock, California, with a Bachelor's degree in Computer Science and Mathematics.

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Last modified on
Thursday, 19-Jan-2012 01:04:02 EST
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