anchor.diff:                  tag_cache :: 'false' | gb_set(),
                   write_blacklist :: [node()],
                   read_blacklist :: [node()]}).
  +
  +%% ===================================================================
  +%% API functions
   
   start_link() ->
       error_logger:info_report([{"DDFS master starts"}]),
  
positive.code:     end.
  
  stop() -> not_implemented.
  
  init(_Args) ->
      spawn_link(fun() -> monitor_diskspace() end),
  
negative.code: -module(ddfs_master).
  -behaviour(gen_server).
  
  -export([start_link/0, stop/0]).
  -export([init/1,
           handle_call/3,
           handle_cast/2,
           handle_info/2,
           terminate/2,
           code_change/3]).
  
  -define(WEB_PORT, 8011).
  
  