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  Oracle Replication Tips by Burleson

Oracle replication Loading or Re synchronizing Data

So far, we have discussed moving large amounts of data before creating the replication environment.  Now you may ask, what if replication has already been created and is running?  You can always stop replication activity on the master group, but that places all objects in the group in read-only status.  To stop replication and not place the objects in read-only status, you must use the dbms_reputil package. 

execute DBMS_REPUTIL.REPLICATION_OFF;

This disables all replication triggers so that you can modify data without replicating the changes.  You can now load or remove data without propagating the changes.  When finished, reactivate the triggers.

execute DBMS_REPUTIL.REPLICATION_ON;

Once the replication triggers are active, further changes will be propagated.  As always, there is a catch.  It is up to the DBA to insure that no user changes are made to any site while the replication triggers are off.  Also, to insure data integrity, all sites should load the data simultaneously to avoid conflicts.  Data conflicts are discussed in the next chapter.


This is an excerpt from Oracle Replication By Rampant TechPress (only $19.95).  You can click here to order a copy and get instant access to the code depot:

http://www.rampant-books.com/book_2003_2_replication.htm


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