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Configure the Recovery Manager MML

Database extra tip #3 from "30 tips in 30 minutes," brought to you by the IOUG.


The following is database extra tip #3 from "30 tips in 30 minutes," brought to you by the IOUG. Return to the main page for more tips on this topic.


The Media Management Layer allows RMAN to communicate directly to a tape vendors software. To configure the MML for your tape vendor, contact the vendor or navigate to their Web site. Most vendors have detailed instruction on setting up the MML for their tape software on different operating system. A typical set up will go something like this:

1. Shut down all Oracle databases sharing the current ORACLE_HOME directory.

2. Delete the old symbolic link for libobk.so:
rm $ORACLE_HOME/lib/libobk.so

3. Create a symbolic link between libobk.so and the shared library that you want to use (in this example, the tape vendor's library file is named libxyz.so).
% ln -s $ORACLE_HOME/lib/libobk.so $TAPE_SOFTWARE/lib/libxyz.so

4. Verify that the link is successful by using the sbttest test program to back up a file. For example, enter:
% sbttest testfile.txt -trace sbtio.log

For more information, see Chapter 11 of "Oracle backup and recovery 101."


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About the author: Kenny Smith has been working with Oracle technology on HP servers for over a decade. He specializes in Oracle database architecture, database administration and development. He has presented at numerous Oracle conferences on two continents. He has published many articles describing Oracle solutions and has co-authored "Oracle backup and recovery 101" from Oracle Press.

IOUG: Become a member of the IOUG to access the paper referenced here and a repository of technical content created for Oracle users by Oracle users.

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