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Don Burleson Blog 







RMAN Transportable Tablespace (TTS)

Expert Oracle Database Tips by Donald BurlesonMarch 25, 2015

RMAN Transportable Tablespaces and Databases

There are different solutions to satisfy the need to transport the data between databases in Oracle.  Data Pump can be used to export logical backup of the database and import it to another database or database links can be used to copy the objects between databases.  But these basic methods are more time consuming than a more advanced way, particularly if dealing with terabytes of data. 

Transportable Tablespace (TTS) Feature

The advanced way to do this is by using the Transportable Tablespace (TTS)feature of RMAN.  Using this feature, the datafiles which contain actual data can be copied, thus making the migration faster.  This feature was firstly introduced in Oracle 8i which allowed copying the data between databases that used the same block size faster than a traditional export/import. 

In version 9i, Oracle introduced a multiple block size feature, and so removed that restriction from TTS.  In Oracle 10g Release 1, the Cross Platform transportable tablespace feature was introduced that allows the moving of datafiles between platforms that use different endian formats.  In Oracle 10g Release 2, a transportable database feature was introduced which allows transporting the whole database to the different platform with the same endian format.

This chapter will explain and demonstrate in practical terms the following TTS methods:

  • Transporting tablespaces between two databases with the same platform using both RMAN backups and live datafiles

  • Transporting a single tablespace between two databases running on the different platforms (Cross-Platform transportable tablespace)

  • Transporting the whole database to the different platform (Cross-Platform transportable database)

The first scenario will be divided into two parts:  in the first part, the tablespace will be transported using RMAN backup, while in the second part, no backup will be used and tablespaces will be copied from the running database instance. In the second scenario, a cross-platform transportation of the tablespace from Solaris OS to Linux will be performed.  In the third scenario, the whole database that runs on Windows OS will be transported to the Linux OS.

Transportable Tablespace can be used to:

  • Transport the tablespace from the test environment to the production database

  • Transport data from a production database to a data warehouse system

  • Publish data to customers

  • Perform Tablespace Point in Time Recovery (TSPITR)

  • Upgrade the database to the new release

The following are the limitations of the Transporting Tablespace feature:

  • It is not possible to transport the system tablespace and the objects that are owned by the user SYS.

  • Both databases must be running with a compatible parameter set to 10.0 or higher.

  • In Oracle 10g, the tablespace must be set to read/write so it can be transported to another platform. However this restriction is not available in Oracle 11g.  The tablespace does NOT have to be put in read/write mode before transporting it to another platform in Oracle 11g. 

  • The character set and national character set must be the same for both source and target databases.

  • The tablespace cannot be transported that is already present in the target database until and unless either the source tablespace or target tablespace is renamed before the tablespace transport.


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