@Override
  protected int doWork() throws IOException {
    if (!isVerbose) {
      Log4jUtils.setLogLevel(ZooKeeper.class.getName(), "WARN");
    }
    if (numTables > 1) {
      return parallelLoadTables();
    } else {
      return loadTable();
    }
  }
Apply column family options such as Bloom filters, compression, and data block encoding.
hbase-diagnostics/src/main/java/org/apache/hadoop/hbase/util/LoadTestTool.java