anchor.diff:      BucketName = bucket_name(),
   
       GraphFun = fun({N, _, _}=Peer, _Graph) ->
  -                       Node = atom_to_list(N),
  +                       Node = prefix(atom_to_list(N)),
                          try
                              Result = erlcloud_s3:get_object(BucketName, Node),
                              Body = proplists:get_value(content, Result, undefined),
  
positive.code:                 end, Graph, Membership).
  
  %% @private
  bucket_name() ->
      % Simulation = lasp_config:get(simulation, undefined),
      % EvalIdentifier = lasp_config:get(evaluation_identifier, undefined),
      EvalTimestamp = lasp_config:get(evaluation_timestamp, 0),
      integer_to_list(EvalTimestamp).
  
  %% @private
  clients_from_marathon() ->
  
negative.code:     {ok, Nodes} = lasp_peer_service:members(),
  
      %% Store membership.
      Node = prefix(atom_to_list(node())),
      Membership = term_to_binary(Nodes),
      erlcloud_s3:put_object(BucketName, Node, Membership),
  
  