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How does the integration test suite work? 

• The integration tests are tightly tied to the MR Execution engine at this point. Some rework will be needed to get this working in a Spark execution engine context.
• They use the Hadoop Minicluster** behind the scenes. to simulate the MR execution engine environment. It runs the test to simulate a real distributed cluster but only difference is that it happens in the same JVM. Hence it is also referred to as the psuedo distributed mode

• When using this option -Dsqoop.hadoop.runner.class=org.apache.sqoop.test.hadoop.HadoopLocalRunner, it does use the minicluster and 

** http://www.lopakalogic.com/articles/hadoop-articles/hadoop-testing-with-minicluster/

What DB does integration tests use today for storing the Sqoop entities ?

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