anchor.diff:      do_upgrade_config_from_3_0_to_3_0_1(Config, DefaultConfig).
   
   do_upgrade_config_from_3_0_to_3_0_1(Config, DefaultConfig) ->
  +    McdKey = {node, node(), memcached},
  +    {value, DefaultMcdConfig} = ns_config:search([DefaultConfig], McdKey),
  +    {value, CurrentMcdConfig} = ns_config:search(Config, McdKey),
  +    EnginesTuple = {engines, _} = lists:keyfind(engines, 1, DefaultMcdConfig),
  +    NewMcdConfig = lists:keystore(engines, 1, CurrentMcdConfig, EnginesTuple),
  +    [{set, McdKey, NewMcdConfig}].
  +
  +upgrade_config_from_3_0_1_to_3_0_99(Config) ->
  +    ?log_info("Upgrading config from 3.0.1 to 3.0.99"),
  +    DefaultConfig = default(),
  +    do_upgrade_config_from_3_0_1_to_3_0_99(Config, DefaultConfig).
  +
  +do_upgrade_config_from_3_0_1_to_3_0_99(Config, DefaultConfig) ->
       McdKey = {node, node(), memcached},
       JTKey = {node, node(), memcached_config},
       PortServersKey = {node, node(), port_servers},
  
positive.code:                                                {config_path, cfg_path}]},
                    {set, {node, _, memcached_config}, memcached_config},
                    {set, {node, _, port_servers}, port_servers_cfg}],
                   do_upgrade_config_from_3_0_to_3_0_1(Cfg, Default)).
  
  
  no_upgrade_on_current_version_test() ->
  
negative.code: -define(NS_LOG, "ns_log").
  
  get_current_version() ->
      {3,0,99}.
  
  ensure_data_dir() ->
      RawDir = path_config:component_path(data),
  