anchor.diff:  
   
   test_single_add(_Config) ->
  -%    log:log("join nodes", []),
  +    %% log:log("join nodes", []),
       log:log("add nodes", []),
       synchronous_add(config:read(replication_factor), config:read(replication_factor)+1),
       %timer:sleep(5000), % enable to see rest of protocol
       ok.
   
   test_double_add(_Config) ->
  -%    log:log("join nodes", []),
  +    %% log:log("join nodes", []),
       log:log("add nodes", []),
       synchronous_add(config:read(replication_factor), config:read(replication_factor)+2),
       %timer:sleep(5000), % enable to see rest of protocol
       ok.
   
   test_triple_add(_Config) ->
  -%    log:log("join nodes", []),
  +    %% log:log("join nodes", []),
       log:log("add nodes", []),
       synchronous_add(config:read(replication_factor), config:read(replication_factor)+3),
       %timer:sleep(5000), % enable to see rest of protocol
  
positive.code: %
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  
  synchronous_kill(Current, Current) ->
      ok;
  synchronous_kill(Current, _TargetSize) ->
      _ = api_vm:kill_nodes(1),
      ct:pal("wait for ring size"),
      lease_helper:wait_for_ring_size(Current - 1),
  
negative.code: 
  
  test_single_kill(_Config) ->
      case config:read(replication_factor) < 4 of
          true ->
              lo:log("skipped: this test case is likely to fail for small replication factors"),
              ok;
          false ->
              NrOfNodes = api_vm:number_of_nodes(),
              log:log("kill nodes", []),
              synchronous_kill(NrOfNodes),
              %% timer:sleep(5000), % enable to see rest of protocol
              ok
      end.
  
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  %
  