@Test
  public void testMixedAtomicity() throws Exception {
    runTestAtomicity(20000, 5, 2, 2, 3);
  }
Test case that uses multiple threads to read and write multifamily rows into a table, verifying
that reads never see partially-complete writes. This can run as a junit test, or with a main()
function which runs against a real cluster (eg for testing with failures, region movement, etc)
hbase-server/src/test/java/org/apache/hadoop/hbase/AcidGuaranteesTestBase.java