anchor.diff:  -include("kai.hrl").
   -include("kai_test.hrl").
   
  -all() -> [test1, test2].
  +all() -> [test_hash]. % test_hash_efficiency
   
   % Hash ring of test1:
   %
  
positive.code: % 3,758,096,384  bucket-7   [3,2,1] -> [3,1,4]
  % 4,264,647,116   NODE3(1)
  
  test1() -> [].
  test1(_Conf) ->
      kai_config:start_link([
          {hostname, "localhost"},
          {rpc_port, 11011},
  
negative.code:     kai_hash:stop(),
      kai_config:stop().
  
  test_hash_efficiency() -> [].
  test_hash_efficiency(_Conf) ->
      io:format("simulate network of 64 nodes"),
  
      kai_config:start_link([
  