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Don Burleson Blog 







clonedb Tips

Oracle Database Tips by Donald BurlesonJune 26, 2013


Question:  What does the new clonedb feature in Oracle 12c?

Answer:  The clonedb is an RMAN enhancement that allows for superfast database cloning from an RMAN backup using direct NFS (DNFS).

The clonedb functionality appears to be within the dbms_dnfs package.

(by Earl Shaffer):  The clonedb utility provides a way to easily and quickly create copies of databases on network attached storage (NAS), using a thin provisioning approach integrated with Oracle Database.
Cloning a production database is a common technique used to help develop and test changes to applications and their surrounding environments. Before a new operating system release, storage software, or application version is installed in a production environment, thorough testing is needed using production data.

This is usually accomplished by copying the production database to a test environment. In addition, to the test environment, copies of the production database are also made to the development environments where application developers are creating or modifying applications and testing them. All of these copies require large amounts of storage to be allocated and managed. Using thin provisioning, clonedb greatly reduces the amount of storage needed for clones of production databases.

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