TypeComparator<Tuple2<String, String[]>> comparator = typeInfo.createComparator(new int[] { 0 }, new boolean[] { true } );
reader = new BufferedReader(new FileReader(input));
MutableObjectIterator<Tuple2<String, String[]>> inputIterator = new StringTupleReaderMutableObjectIterator(reader);
sorter = new UnilateralSortMerger<Tuple2<String, String[]>>(mm, ioMan, inputIterator, new DummyInvokable(),
new RuntimeStatelessSerializerFactory<Tuple2<String, String[]>>(serializer, (Class<Tuple2<String, String[]>>) (Class<?>) Tuple2.class), comparator, 1024 * 1024, 4, 0.8f);
// use this part to verify that all if good when sorting in memory