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ORA-01187 from RMAN copy command tips

Oracle Tips by Burleson Consulting


Question:  I copied a database using the RMAN copy utility, and when I tried to open the database I got the ORA-01187 error, pointing to a temp file.


Is there an issue with copying temp tablespaces using RMAN?


Answer: Yes, there is!  MOSC note Note:167135.1, titled "How to Incorporate Locally Managed Temporary Tablespaces into the Backup Strategy" and dated 21-MAR-2006 notes that locally managed temporary tablespaces do not need to be backed up, and the ORA-01187 is related to other "issues" with backing-up TEMP tablespaces:


ORA-03217: Invalid option for alter of TEMPORARY TABLESPACE

Cause: Alter database and alter tablespace will not work on locally managed tempfiles as they have no reference in the data dictionary. There is no need to back up the tempfiles as they are used and destroyed every time you start up and shut down the database.

The MOSC notes says that there is no need to backup the temporary locally managed tablespaces for these reasons:

1. Locally managed tempfiles are always set to NOLOGGING mode. So thus will have no undo.

2. Extents are managed by bitmap in each datafile to keep track of free or used status of blocks in that datafile.

3. The data dictionary does not manage the tablespace.

4. Rollback information is not generated because there is no update on the data dictionary.

5. Media recovery does not recognize tempfiles.

Hence, this is expected behavior and you should drop and recreate your TEMP tablespace in the target database!



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