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  Oracle Database Tips by Donald Burleson

Oracle10g Grid Computing with RAC
Chapter 8 - RAC Administration

Oracle Managed Files

Oracle Managed Files (OMF) directly manages file creation and deletion at the operating system level. You specify operations in terms of database objects rather than filenames. Oracle internally uses standard file system interfaces to create and delete files as needed for the database structures such as tablespaces, online redo log files, and control files.

Administrators need to specify the file system directory to be used for a particular type of file. Thereafter, Oracle manages to create unique files when needed and also deletes files that are not needed. The advantages include:

  • No need to bother about the file names and storage requirements. Oracle provides a unique file name.

  • Eliminates the need for the DBA to directly manage OS files.

  • Allows operations to be specified in terms of objects and not files.

  • Reduces the chance of overwriting a file. Avoids accidental corruption of data files.

  • Reduces wasted disk space consumed by obsolete files. When you drop a tablespace, the relevant files are automatically removed at the host level.

The above text is an excerpt from:

Oracle 10g Grid & Real Application Clusters
Oracle 10g Grid Computing with RAC
ISBN 0-9744355-4-6

by Mike Ault, Madhu Tumma


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