@Test
  public void testContinuousIngest() throws IOException, Exception {
    // Loop <num iterations> <num mappers> <num nodes per mapper> <output dir> <num reducers>
    Configuration conf = getTestingUtil(getConf()).getConfiguration();
    if (isMultiUnevenColumnFamilies(getConf())) {
      // make sure per CF flush is on
      conf.set(FlushPolicyFactory.HBASE_FLUSH_POLICY_KEY,
        FlushAllLargeStoresPolicy.class.getName());
    }
    int ret = ToolRunner.run(conf, new Loop(), new String[] { "1", "1", "2000000",
      util.getDataTestDirOnTestFS("IntegrationTestBigLinkedList").toString(), "1" });
    org.junit.Assert.assertEquals(0, ret);
  }
A stand alone program that follows a linked list created by {@link Generator} and prints timing
info.
hbase-it/src/test/java/org/apache/hadoop/hbase/test/IntegrationTestBigLinkedList.java