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Parallelism in an Oracle to Non-Oracle Heterogeneous Environment

edited Oct 9, 2012 1:12AM in GoldenGate, Streams and Distributed Database (MOSC) 3 commentsAnswered ✓
In the “Oracle Streams Heterogeneous Information Sharing” chapter of the 11.2 Oracle® Streams Replication Administrator's Guide (http://docs.oracle.com/cd/E11882_01/server.112/e10705/hetero.htm#i1006155) there is a section titled “Parallelism in an Oracle to Non-Oracle Heterogeneous Environment”. It states “parallel apply to non-Oracle databases is not supported”. Why? What are the implications of using parallel apply other than “it is not supported”?

We have been using Streams parallel apply to a SQL Server database for ~6 years. Our performance tests show that parallel=1 is insufficient for our needs as replication falls behind with parallel=1. Using multiple apply processes is not an option as it would mean that changes could be applied out of sequence.

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