@Override
  public void force() throws IOException {
    if (channel != null && channel.isOpen()) {
      channel.force(true);
    }
  }
LogWriter writes the binary logs into a file using FileChannel together with check sums of each
log calculated using CRC32.
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/utils/writelog/LogWriter.java