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Oracle Datafiles

Datafiles are the physical implementations of Oracle tablespaces. Tablespaces are the logical units of storage (containers) that would roughly compare to volume groups in an operating system. Each tablespace can have hundreds of tables, indexes, rollback segments, constraints, and other internal structures mapped into it. In return, these are then mapped into the datafiles that correspond to the tablespaces. Only a limited number of datafiles can be associated with a tablespace. The total number of datafiles for the entire database is set by the MAXDATAFILES parameter at creation.



This is an excerpt by Mike Ault’s book “Oracle Administration & Management”.  If you want more current Oracle tips by Mike Ault, check out his new book “Mike Ault’s Oracle Internals Monitoring & Tuning Scripts” or Ault’s Oracle Scripts Download.


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