diff --git a/README.md b/README.md
index 6f176c0..436fc4c 100644
--- a/README.md
+++ b/README.md
@@ -8,22 +8,23 @@ you can get much more information about redis at http://github.com/antirez/redis
     $ make
     $ make install
 
-    the make install statement will install the redis library into the 
-    $ERL_TOP/lib/ directory (kernel, stdlib also in that directory).
-    now you can use the redis client in your application.
+the make install statement will install the redis library into the 
+$ERL_TOP/lib/ directory (kernel, stdlib also in that directory).
+now you can use the redis client in your application.
 
 ## Usage
 
-    the redis library has two kinds of modes:
-    standalone mode:
-        you can use redis module to everything. first you must setup an connection
-        with redis server, then you can call commands and get reply from the server.
-    
-    application mode:
-        this mode is working like the standard erlang library. e.g. sasl, crypto, inets.
-        you must call application:start(redis) when you want to use redis client.
-        the erl redis application will manager the connections with redis server automatically.
-
-    if you want do some trivial work you had better use standalone mode, it is simple enough.
-    if you want use redis in production, you had better use application mode. it is so robust
-    by use erlang OTP.
+the redis library has two kinds of modes:
+
+standalone mode:
+    you can use redis module to everything. first you must setup an connection
+    with redis server, then you can call commands and get reply from the server.
+
+application mode:
+    this mode is working like the standard erlang library. e.g. sasl, crypto, inets.
+    you must call application:start(redis) when you want to use redis client.
+    the erl redis application will manager the connections with redis server automatically.
+
+if you want do some trivial work you had better use standalone mode, it is simple enough.
+if you want use redis in production, you had better use application mode. it is so robust
+by use erlang OTP.
diff --git a/include/redis.hrl b/include/redis.hrl
index 5ae33ae..710ca5e 100644
--- a/include/redis.hrl
+++ b/include/redis.hrl
@@ -1,6 +1,6 @@
 %%%----------------------------------------------------------------------
 %%%
-%%% @copyright litaocheng@gmail
+%%% @copyright erl-redis 2010
 %%%
 %%% @author litaocheng@gmail.com
 %%% @doc redis client header file
@@ -13,6 +13,8 @@
 -include_lib("eunit/include/eunit.hrl").
 -endif.
 
+-include("redis_log.hrl").
+
 %% syntax similar with '?:' in c
 -ifndef(IF).
 -define(IF(C, T, F), (case (C) of true -> (T); false -> (F) end)).
@@ -25,4 +27,6 @@
 -define(N2S(N), integer_to_list(N)).
 -define(S2N(S), list_to_integer(S)).
 
+
+
 -endif. % REDIS_HRL
diff --git a/include/redis_log.hrl b/include/redis_log.hrl
new file mode 100644
index 0000000..90ba29c
--- /dev/null
+++ b/include/redis_log.hrl
@@ -0,0 +1,71 @@
+%%%----------------------------------------------------------------------
+%%%
+%%% @copyright erl-redis 2010
+%%%
+%%% @author litaocheng@gmail.com
+%%% @doc the log header
+%%%
+%%%----------------------------------------------------------------------
+-ifndef(REDIS_LOG_HRL).
+-define(REDIS_LOG_HRL, ok).
+
+-ifdef(NOLOG).
+    -define(DEBUG(F), ok).
+    -define(DEBUG2(F, D), ok).
+
+    -define(INFO(F), ok).
+    -define(INFO2(F, D), ok).
+
+    -define(WARN(F), ok).
+    -define(WARN2(F, D), ok).
+
+    -define(ERROR(F), ok).
+    -define(ERROR2(F, D), ok).
+
+-else.
+
+    -ifdef(EUNIT).
+
+        -define(EUNITFMT(T, F, D), (?debugFmt((T) ++ "(~p) " ++ (F), [self()] ++ (D)))).
+
+        -define(DEBUG(F), ?EUNITFMT("[D]", F, [])).
+        -define(DEBUG2(F, D), ?EUNITFMT("[D]", F, D)).
+
+        -define(INFO(F), ?EUNITFMT("[I]", F, [])).
+        -define(INFO2(F, D), ?EUNITFMT("[I]", F, D)).
+
+        -define(WARN(F), ?EUNITFMT("[*W*]", F, [])).
+        -define(WARN2(F, D), ?EUNITFMT("[*W*]", F, D)).
+
+        -define(ERROR(F), ?EUNITFMT("[**E**]", F, [])).
+        -define(ERROR2(F, D), ?EUNITFMT("[**E**]", F, D)).
+
+    -else.
+        -define(ML_FMT(F), " (~p:~p) "++(F)).
+        -define(ML_DATA(D), [?MODLE, ?LINE]++(D)).
+
+        -define(DEBUG(F), 
+            error_logger:info_msg(?ML_FMT("[D]"++F), ?ML_DATA([])).
+        -define(DEBUG2(F, D),
+            error_logger:info_msg(?ML_FMT("[D]"++F), ?ML_DATA(D)).
+
+        -define(INFO(F), 
+            error_logger:info_msg(?ML_FMT("[I]"++F), ?ML_DATA([])).
+        -define(INFO2(F, D),
+            error_logger:info_msg(?ML_FMT("[I]"++F), ?ML_DATA(D)).
+
+        -define(WARN(F),
+            error_logger:warning_msg(?ML_FMT("[*W*]"++F), ?ML_DATA([])).
+        -define(WARN2(F, D), 
+            error_logger:warning_msg(?ML_FMT("[*W*]"++F), ?ML_DATA(D)).
+
+        -define(ERROR(F),
+            error_logger:error_msg(?ML_FMT("[**E**]"++F), ?ML_DATA([])).
+        -define(ERROR2(F, D),
+            error_logger:error_msg(?ML_FMT("[**E**]"++F), ?ML_DATA(D)).
+
+    -endif. %EUNIT
+
+-endif. %NOLOG
+
+-endif. % REDIS_LOG_HRL
diff --git a/src/Makefile b/src/Makefile
index 0ff4422..780812d 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -12,11 +12,11 @@ INCLUDE_DIRS := ../include ./
 INCLUDE_FILES := $(wildcard ../include/*.hrl) $(wildcard ./*.hrl) 
 
 EBIN_DIRS := $(wildcard ../libs/*/ebin)
-ERLC_FLAGS := -W $(addprefix -I , $(INCLUDE_DIRS)) $(EBIN_DIRS:%=-pa %)
+ERLC_FLAGS := -W $(addprefix -I , $(INCLUDE_DIRS)) $(EBIN_DIRS:%=-pa %) 
+
 
 ifdef TEST
-  ERLC_FLAGS += -DTEST
-  ERLC_FLAGS += +debug_info #+bin_opt_info
+  ERLC_FLAGS += -DTEST +debug_info
 endif
 
 ifdef NOLOG
@@ -27,6 +27,16 @@ ifdef HIPE
   ERLC_FLAGS += +native +"{hipe, [o3]}"
 endif
 
+# in deploy environment, the ctl file set the log dir to /var/log/$APP_NAME
+# set the etc dir to /etc/$APP_NAME
+ifdef DEPLOY
+  LOGDIR =/var/log/$(APP_NAME)
+  CONFDIR =/etc/$(APP_NAME)
+else
+  LOGDIR =./log
+  CONFDIR =./etc
+endif
+
 BASE_DIR := ..
 EBIN_DIR := ../ebin
 DOC_DIR  = ../edoc
@@ -42,14 +52,18 @@ ERL_OBJECTS_LOCAL := $(ERL_SOURCES:%.erl=./%.$(EMULATOR))
 APP_TPL_FILES = $(wildcard *.app.src)
 APP_FILES = $(APP_TPL_FILES:%.src=%)
 
-ALL_FILES = $(ERL_OBJECTS) $(addprefix $(EBIN_DIR)/, $(APP_FILES)) 
+ALL_FILES = $(ERL_OBJECTS) $(addprefix $(EBIN_DIR)/, $(APP_FILES))
 
 $(EBIN_DIR)/%.app: %.app.src
 	@echo "creating .app file... "
-	@sed -e 's:@APP_VSN@:$(APP_VSN):g' \
-		-e 's:@APP_NAME@:$(APP_NAME):g' \
+	@sed -e 's:@APP_NAME@:$(APP_NAME):g' \
+		-e 's:@APP_VSN@:$(APP_VSN):g' \
 		-e 's:@MODULES@:$(ERL_MODULES_IN_APP):g' -e "s:\`:\':g" -e 's/,]/]/g' $< > $@
 
+$(BASE_DIR)/%ctl: %ctl.tpl
+	@sed -e 's:@LOGDIR@:$(LOGDIR):g' -e 's:@CONFDIR@:$(CONFDIR):g'  $< > $@
+	(chmod 775 $@)
+
 $(EBIN_DIR)/%.$(EMULATOR): %.erl $(INCLUDE_FILES)
 	$(ERLC) $(ERLC_FLAGS) -o $(EBIN_DIR) $<
 
@@ -59,4 +73,4 @@ edoc:
 	$(ERL) -noshell -eval "edoc:application($(APP_NAME), \".\", [${DOC_OPTS}]),init:stop()"
 
 clean:
-	(rm -rf ./*.beam; rm -f *.app;)
+	(rm -rf ./*.beam; rm -rf $(EBIN_DIR)/*.beam; rm -f *.app; rm -f *ctl)
diff --git a/src/overview.edoc b/src/overview.edoc
new file mode 100644
index 0000000..eeb9151
--- /dev/null
+++ b/src/overview.edoc
@@ -0,0 +1,7 @@
+** this is the overview.doc file for the application 'erl-redis' **
+
+@author litaocheng <litaocheng@gmail.com>
+@copyright 2010
+@version @VERSION@
+@title Welcome to the `erl-redis' application!
+@doc `erl-redis' is an erlang client for redis.
diff --git a/src/redis.app.src b/src/redis.app.src
index dbbb348..fd0b1e0 100644
--- a/src/redis.app.src
+++ b/src/redis.app.src
@@ -4,6 +4,7 @@
      {modules, [@MODULES@]},
      {registered, []},
      {applications, [kernel, stdlib]},
+     {mod, {redis_app, []}},
      {env, []}
     ]
 }.
diff --git a/src/redis.erl b/src/redis.erl
new file mode 100644
index 0000000..a9f3c36
--- /dev/null
+++ b/src/redis.erl
@@ -0,0 +1,21 @@
+%%%----------------------------------------------------------------------
+%%%
+%%% @copyright erl-redis 2010
+%%%
+%%% @author litaocheng@gmail.com
+%%% @doc the interface for redis
+%%% @end
+%%%
+%%%----------------------------------------------------------------------
+-module(redis).
+-author('ltiaocheng@gmail.com').
+-vsn('0.1').
+-include("redis.hrl").
+
+-export([i/0]).
+
+
+%% @doc show stats info in the stdout
+-spec i() -> 'ok'.
+i() ->
+    ok.
diff --git a/src/redis_app.erl b/src/redis_app.erl
new file mode 100644
index 0000000..9d6574c
--- /dev/null
+++ b/src/redis_app.erl
@@ -0,0 +1,52 @@
+%%%----------------------------------------------------------------------
+%%%
+%%% @copyright erl-redis 2010
+%%%
+%%% @author litao cheng <litaocheng@gmail.com>
+%%% @doc redis app and supervisor callback
+%%% @end
+%%%
+%%%----------------------------------------------------------------------
+-module(redis_app).
+-author('litaocheng@gmail.com').
+-vsn('0.1').
+-include("redis.hrl").
+
+-behaviour(application).
+-behaviour(supervisor).
+
+-export([start/0]).
+-export([start/2, stop/1]).
+-export([init/1]).
+
+-define(MAIN_SUP, redis_sup).
+
+%% @doc start the application from the erl shell
+-spec start() -> 'ok' | {'error', any()}.
+start() ->
+    ?DEBUG2("start the ~p application", [?MODULE]),
+    application:start(redis).
+
+%% @doc the application start callback
+-spec start(Type :: any(), Args :: any()) -> any().
+start(_Type, _Args) ->
+    ?INFO2("start the supervisor sup", []),
+    supervisor:start_link({local, ?MAIN_SUP}, ?MODULE, []).
+
+%% @doc the application  stop callback
+stop(_State) ->
+    ok.
+
+%% @doc supervisor callback
+init(_Args) -> 
+    ?DEBUG2("init supervisor~n", []),
+    Stragegy = {simple_one_for_one, 10, 10},
+    Client = {undefined, {redis_client, start_link, []},
+                permanent, 1000, worker, [redis_client]},
+
+    {ok, {Stragegy, [Client]}}.
+
+%%
+%% internal API
+%%
+
diff --git a/src/redis_client.erl b/src/redis_client.erl
new file mode 100644
index 0000000..a061129
--- /dev/null
+++ b/src/redis_client.erl
@@ -0,0 +1,68 @@
+%%%----------------------------------------------------------------------
+%%%
+%%% @copyright erl-redis 2010
+%%%
+%%% @author litaocheng <litaocheng@gmail.com>
+%%% @doc 
+%%% @end
+%%%
+%%%----------------------------------------------------------------------
+-module(redis_client).
+-author('litaocheng@gmail.com').
+-vsn('0.1').
+-behaviour(gen_server).
+-include("redis.hrl").
+
+-export([start/0, start_link/0]).
+
+
+-export([init/1, handle_call/3, handle_cast/2, handle_info/2,
+                            terminate/2, code_change/3]).
+
+-record(state, {
+    }).
+
+-define(SERVER, ?MODULE).
+
+%% @doc start the redis_sysdata server
+-spec start() -> {'ok', any()} | 'ignore' | {'error', any()}.
+start() ->
+    ?DEBUG2("start ~p ~n", [?SERVER]),
+    gen_server:start({local, ?SERVER}, ?MODULE, [], []).
+
+%% @doc start_link the redis_sysdata server
+-spec start_link() -> {'ok', any()} | 'ignore' | {'error', any()}.
+start_link() ->
+    ?DEBUG2("start_link ~p ~n", [?SERVER]),
+    gen_server:start_link({local, ?SERVER}, ?MODULE, [], []).
+
+%%
+%% gen_server callbacks
+%%
+init(_Args) ->
+    {ok, #state{}}.
+
+handle_call(_Msg, _From, State) ->
+    {noreply, State}.
+
+handle_cast(_Msg, State) ->
+    {noreply, State}.
+
+handle_info(_Info, State) ->
+    {noreply, State}.
+
+terminate(_Reason, _State) ->
+    ok.
+
+code_change(_Old, State, _Extra) ->
+    {ok, State}.
+
+%%-----------------------------------------------------------------------------
+%%
+%% internal API
+%%
+%%-----------------------------------------------------------------------------
+
+-ifdef(TEST).
+
+-endif.