type file;

app (file outFile) gen(string arg)
{
  fileGenTest arg stdout=@filename(outFile);
}

app (file summaryFile) catBase(file[auto] inFiles) {
  cat @filenames(inFiles) stdout=@filename(summaryFile);
}

file[auto] results;
foreach i in [0:10] {
  file curFile <single_file_mapper; file="file."+@toString(i)>;
  file[auto] blocks;
  foreach j in [0:40] {
    file curFileBlock <single_file_mapper; file="file."+@toString(i)+"."+@toString(j)>;
    (curFileBlock) = gen(@toString(i*j));
    blocks << curFileBlock;
  }
  (curFile) = catBase(blocks);

  results << curFile;
}

file allFile <single_file_mapper; file="all">;
(allFile) = catBase(results);