With integrated capture mechanism, Goldengate can supports EHCC on Exadata
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https://blogs.oracle.com/dataintegration/entry/oracle_goldengate_11gr2_new_featureThe Integrated Capture mechanism relies on Oracle’s internal log parsing and processing to capture DML transactions. By moving closer to the Oracle Database engine, Oracle GoldenGate can take advantage of new Oracle Database features and functionality more quickly.
For example, this new mechanism allows GoldenGate to support advanced features such as compression. Integrated Capture provides support for all flavors of Oracle compression, including hybrid columnar compression (EHCC) on Exadata, where as our “Classic” capture would not.