pr-871.dot

digraph test_setup {
  rankdir = LR;
  node [ shape = cylinder; label = "DB" ];
  db_indexer;
  db_forwarder;
  node [ shape = box3d ];
  { rank = same; indexer; db_indexer; }
  { rank = same; forwarder; db_forwarder; }
  generator [ label = "Generator"; ];
  indexer [ label = "Indexer"; ];
  forwarder [ label = "Forwarder"; ];
  processor [ label = "Processor"; ];
  terminator [ label = "Terminator"; ];
  generator -> indexer;
  indexer -> db_indexer;
  indexer -> forwarder;
  indexer -> terminator;
  forwarder -> db_forwarder;
  forwarder -> processor;
  processor -> generator [ constraint = false; style = dashed; ];
}