String smallName = file.substring(0, file.length() - 3) + "_small.rf";
String largeName = file.substring(0, file.length() - 3) + "_large.rf";
int blockSize = (int) aconf.getMemoryInBytes(Property.TABLE_FILE_BLOCK_SIZE);
Writer small = new RFile.Writer(new CachableBlockFile.Writer(fs, new Path(smallName), "gz", conf, aconf), blockSize);
small.startDefaultLocalityGroup();
Writer large = new RFile.Writer(new CachableBlockFile.Writer(fs, new Path(largeName), "gz", conf, aconf), blockSize);
large.startDefaultLocalityGroup();
iter.seek(new Range(), new ArrayList<ByteSequence>(), false);
while (iter.hasTop()) {