private SequenceFile.Sorter NewSorter(FileSystem fs, bool fast, int megabytes, int
factor)
{
SequenceFile.Sorter sorter = fast ? new SequenceFile.Sorter(fs, new RandomDatum.Comparator
(), typeof(RandomDatum), typeof(RandomDatum), conf) : new SequenceFile.Sorter(fs
, typeof(RandomDatum), typeof(RandomDatum), conf);
sorter.SetMemory(megabytes * 1024 * 1024);
sorter.SetFactor(factor);
return(sorter);
}