protected void closeHTable() {
      try {
        if (table != null) {
          table.close();
        }
      } catch (IOException e) {
        LOG.error("Error closing table", e);
      }
    }
Use multi-puts vs. separate puts for every column in a row
hbase-diagnostics/src/main/java/org/apache/hadoop/hbase/util/MultiThreadedWriter.java