diff --git a/trunk/conf/full.conf b/trunk/conf/full.conf
index d06634651..f40a25f9b 100644
--- a/trunk/conf/full.conf
+++ b/trunk/conf/full.conf
@@ -18,10 +18,11 @@ chunk_size          60000;
 # if enabled ffmpeg, each stracoding stream will create a log file.
 # default: ./objs/logs
 ff_log_dir          ./objs/logs;
-# the log file for srs.
-# if not specified or empty, disable log to file, only print to console.
-# if speicfied, write log to file and print to console.
-# default: empty.
+# the log tank, console or file.
+# if console, print log to console.
+# if file, write log to file. requires srs_log_file if log to file.
+# default: console.
+srs_log_tank        console;
 srs_log_file        ./objs/srs.log;
 # the max connections.
 # if exceed the max connections, server will drop the new connection.
diff --git a/trunk/conf/srs.conf b/trunk/conf/srs.conf
index d316884ae..2b8e15e5c 100644
--- a/trunk/conf/srs.conf
+++ b/trunk/conf/srs.conf
@@ -2,6 +2,7 @@
 # @see full.conf for detail config.
 
 listen              1935;
+srs_log_tank        file;
 srs_log_file        ./objs/srs.log;
 vhost __defaultVhost__ {
 }
diff --git a/trunk/etc/init.d/srs b/trunk/etc/init.d/srs
index 7e50d4e22..d261dcc30 100755
--- a/trunk/etc/init.d/srs
+++ b/trunk/etc/init.d/srs
@@ -27,11 +27,11 @@ YELLOW="\\e[33m"
 BLACK="\\e[0m"
 POS="\\e[60G"
 
-ok_msg(){
+ok_msg() {
     echo -e "${1}${POS}${BLACK}[${GREEN}  OK  ${BLACK}]"
 }
 
-failed_msg(){
+failed_msg() {
     echo -e "${1}${POS}${BLACK}[${RED}FAILED${BLACK}]"
 }
 
@@ -43,14 +43,14 @@ failed_msg(){
 # @set variable $error_msg if error.
 # @set variable $srs_pid_file to pid file.
 load_process_info() {
+    # get pid file
     srs_pid_file=`cat ${ROOT}/${CONFIG} |grep ^pid|awk '{print $2}'|awk -F ';' '{print $1}'`
     if [[ -z $srs_pid_file ]]; then srs_pid_file=${DEFAULT_PID_FILE}; fi
+    # get abs path
+    srs_pid_dir=`dirname $srs_pid_file`
+    srs_pid_file=`(cd ${ROOT}; cd $srs_pid_dir; pwd)`/`basename $srs_pid_file`
     
-    if [[ -f $srs_pid_file ]]; then
-        srs_pid=`cat $srs_pid_file 2>/dev/null`
-    else
-        srs_pid=`cat ${ROOT}/$srs_pid_file 2>/dev/null`
-    fi
+    srs_pid=`cat $srs_pid_file 2>/dev/null`
     ret=$?; if [[ 0 -ne $ret ]]; then error_msg="file $srs_pid_file does not exists"; return 1; fi
     
     ps -p ${srs_pid} >/dev/null 2>/dev/null
@@ -69,21 +69,24 @@ start() {
     
     # get log file
     srs_log_file=`cat ${ROOT}/${CONFIG} |grep '^srs_log_file'| awk '{print $2}'| awk -F ';' '{print $1}'`
+    if [[ -z $srs_log_file ]]; then srs_log_file=${DEFAULT_LOG_FILE}; fi
+    # get abs path
+    srs_log_dir=`dirname $srs_log_file`
+    srs_log_file=`(cd ${ROOT}; cd $srs_log_dir; pwd)`/`basename $srs_log_file`
     
     # TODO: FIXME: set limit by, for instance, "ulimit -HSn 10000"
     if [[ -z $srs_log_file ]]; then
-        (cd ${ROOT}; ${APP} -c ${CONFIG} >/dev/null 2>&1)
+        (cd ${ROOT}; ${ROOT}/${APP} -c ${CONFIG} >/dev/null 2>&1)
     else
-        (cd ${ROOT}; ${APP} -c ${CONFIG} >> $srs_log_file 2>&1)
+        (cd ${ROOT}; ${ROOT}/${APP} -c ${CONFIG} >> $srs_log_file 2>&1)
     fi
     
     # check again after start server
-    sleep 1
     for ((i = 0; i < 5; i++)); do
         # sleep a little while, for srs may start then crash.
         sleep 0.1
         load_process_info
-        ret=$?; if [[ 0 -ne $ret ]]; then failed_msg "SRS start failed"; return $ret; fi
+        ret=$?; if [[ 0 -ne $ret ]]; then failed_msg "SRS start failed, see $srs_log_file"; return $ret; fi
     done
     
     # check whether started.
diff --git a/trunk/src/app/srs_app_config.cpp b/trunk/src/app/srs_app_config.cpp
index 2cf21fd7c..f69d072f9 100644
--- a/trunk/src/app/srs_app_config.cpp
+++ b/trunk/src/app/srs_app_config.cpp
@@ -308,7 +308,7 @@ int SrsConfDirective::read_token(SrsFileBuffer* buffer, std::vector<string>& arg
                 srs_error("line %d: unexpected end of file, expecting ; or \"}\"", buffer->line);
                 return ERROR_SYSTEM_CONFIG_INVALID;
             }
-            srs_trace("end of file. ret=%d", ret);
+            srs_trace("config parsed EOF");
             
             return ret;
         }
@@ -684,7 +684,13 @@ int SrsConfig::parse_file(const char* filename)
     // TODO: check http.
     // TODO: check pid.
     
+    // check log
     std::string log_filename = this->get_srs_log_file();
+    if (this->get_srs_log_tank_file() && log_filename.empty()) {
+        ret = ERROR_SYSTEM_CONFIG_INVALID;
+        srs_error("must specifies the file to write log to. ret=%d", ret);
+        return ret;
+    }
     if (!log_filename.empty()) {
         srs_trace("log file is %s", log_filename.c_str());
     }
@@ -1282,6 +1288,18 @@ string SrsConfig::get_srs_log_file()
     return conf->arg0();
 }
 
+bool SrsConfig::get_srs_log_tank_file()
+{
+    srs_assert(root);
+    
+    SrsConfDirective* conf = root->get("srs_log_tank");
+    if (conf && conf->arg0() == "file") {
+        return true;
+    }
+    
+    return false;
+}
+
 bool SrsConfig::get_deamon()
 {
     srs_assert(root);
diff --git a/trunk/src/app/srs_app_config.hpp b/trunk/src/app/srs_app_config.hpp
index b7349e7b7..e3d73bc3a 100644
--- a/trunk/src/app/srs_app_config.hpp
+++ b/trunk/src/app/srs_app_config.hpp
@@ -148,6 +148,7 @@ public:
     virtual void                get_engine_aparams(SrsConfDirective* engine, std::vector<std::string>& aparams);
     virtual std::string         get_engine_output(SrsConfDirective* engine);
     virtual std::string         get_ffmpeg_log_dir();
+    virtual bool                get_srs_log_tank_file();
     virtual std::string         get_srs_log_file();
     virtual bool                get_deamon();
     virtual int                 get_max_connections();
diff --git a/trunk/src/app/srs_app_log.cpp b/trunk/src/app/srs_app_log.cpp
index 9b4a009b5..936a4868a 100644
--- a/trunk/src/app/srs_app_log.cpp
+++ b/trunk/src/app/srs_app_log.cpp
@@ -42,7 +42,7 @@ SrsThreadContext::~SrsThreadContext()
 
 void SrsThreadContext::generate_id()
 {
-    static int id = 1;
+    static int id = 100;
     cache[st_thread_self()] = id++;
 }
 
@@ -230,20 +230,22 @@ void SrsFastLog::write_log(char *str_log, int size, int _level)
     log_data[size++] = LOG_TAIL;
     log_data[size++] = 0;
     
-    // if is error msg, then print color msg.
-    // \033[31m : red text code in shell
-    // \033[32m : green text code in shell
-    // \033[33m : yellow text code in shell
-    // \033[0m : normal text code
-    if (_level <= SrsLogLevel::Trace) {
-        printf("%s", str_log);
-    } else if (_level == SrsLogLevel::Warn) {
-        printf("\033[33m%s\033[0m", str_log);
-    } else{
-        printf("\033[31m%s\033[0m", str_log);
+    if (fd < 0 || !_srs_config->get_srs_log_tank_file()) {
+        // if is error msg, then print color msg.
+        // \033[31m : red text code in shell
+        // \033[32m : green text code in shell
+        // \033[33m : yellow text code in shell
+        // \033[0m : normal text code
+        if (_level <= SrsLogLevel::Trace) {
+            printf("%s", str_log);
+        } else if (_level == SrsLogLevel::Warn) {
+            printf("\033[33m%s\033[0m", str_log);
+        } else{
+            printf("\033[31m%s\033[0m", str_log);
+        }
     }
-
-    // open log file.
+    
+    // open log file. if specified
     if (!_srs_config->get_srs_log_file().empty() && fd < 0) {
         std::string filename = _srs_config->get_srs_log_file();
         
@@ -256,8 +258,9 @@ void SrsFastLog::write_log(char *str_log, int size, int _level)
             );
         }
     }
+    
     // write log to file.
-    if (fd > 0) {
+    if (fd > 0 && _srs_config->get_srs_log_tank_file()) {
         ::write(fd, str_log, size);
     }
 }
diff --git a/trunk/src/app/srs_app_server.cpp b/trunk/src/app/srs_app_server.cpp
index 443bca091..42e5a19f4 100644
--- a/trunk/src/app/srs_app_server.cpp
+++ b/trunk/src/app/srs_app_server.cpp
@@ -179,26 +179,6 @@ SrsServer::~SrsServer()
 int SrsServer::initialize()
 {
     int ret = ERROR_SUCCESS;
-    
-    // use linux epoll.
-    if (st_set_eventsys(ST_EVENTSYS_ALT) == -1) {
-        ret = ERROR_ST_SET_EPOLL;
-        srs_error("st_set_eventsys use linux epoll failed. ret=%d", ret);
-        return ret;
-    }
-    srs_verbose("st_set_eventsys use linux epoll success");
-    
-    if(st_init() != 0){
-        ret = ERROR_ST_INITIALIZE;
-        srs_error("st_init failed. ret=%d", ret);
-        return ret;
-    }
-    srs_verbose("st_init success");
-    
-    // set current log id.
-    _srs_context->generate_id();
-    srs_info("log set id success");
-    
     return ret;
 }
 
@@ -277,6 +257,32 @@ int SrsServer::acquire_pid_file()
     return ret;
 }
 
+int SrsServer::initialize_st()
+{
+    int ret = ERROR_SUCCESS;
+    
+    // use linux epoll.
+    if (st_set_eventsys(ST_EVENTSYS_ALT) == -1) {
+        ret = ERROR_ST_SET_EPOLL;
+        srs_error("st_set_eventsys use linux epoll failed. ret=%d", ret);
+        return ret;
+    }
+    srs_verbose("st_set_eventsys use linux epoll success");
+    
+    if(st_init() != 0){
+        ret = ERROR_ST_INITIALIZE;
+        srs_error("st_init failed. ret=%d", ret);
+        return ret;
+    }
+    srs_verbose("st_init success");
+    
+    // set current log id.
+    _srs_context->generate_id();
+    srs_info("log set id success");
+    
+    return ret;
+}
+
 int SrsServer::listen()
 {
     int ret = ERROR_SUCCESS;
diff --git a/trunk/src/app/srs_app_server.hpp b/trunk/src/app/srs_app_server.hpp
index 11d8b960f..2d6ca8f94 100644
--- a/trunk/src/app/srs_app_server.hpp
+++ b/trunk/src/app/srs_app_server.hpp
@@ -80,6 +80,7 @@ public:
 public:
     virtual int initialize();
     virtual int acquire_pid_file();
+    virtual int initialize_st();
     virtual int listen();
     virtual int cycle();
     virtual void remove(SrsConnection* conn);
diff --git a/trunk/src/main/srs_main_server.cpp b/trunk/src/main/srs_main_server.cpp
index 2677228c5..1984935aa 100644
--- a/trunk/src/main/srs_main_server.cpp
+++ b/trunk/src/main/srs_main_server.cpp
@@ -60,18 +60,8 @@ int run_master()
     signal(SIGNAL_RELOAD, handler);
     signal(SIGTERM, handler);
     signal(SIGINT, handler);
-
-    srs_trace("uname: "SRS_UNAME);
-    srs_trace("build: %s, %s", SRS_BUILD_DATE, srs_is_little_endian()? "little-endian":"big-endian");
-    srs_trace("configure: "SRS_CONFIGURE);
     
-    if ((ret = _srs_server->initialize()) != ERROR_SUCCESS) {
-        return ret;
-    }
-    
-    // TODO: create log dir in _srs_config->get_log_dir()
-    
-    if ((ret = _srs_server->acquire_pid_file()) != ERROR_SUCCESS) {
+    if ((ret = _srs_server->initialize_st()) != ERROR_SUCCESS) {
         return ret;
     }
     
@@ -137,6 +127,8 @@ int main(int argc, char** argv)
 {
     int ret = ERROR_SUCCESS;
     
+    srs_trace("srs(simple-rtmp-server)");
+    
     // TODO: support both little and big endian.
     srs_assert(srs_is_little_endian());
 
@@ -160,6 +152,18 @@ int main(int argc, char** argv)
     if ((ret = _srs_config->parse_options(argc, argv)) != ERROR_SUCCESS) {
         return ret;
     }
+
+    srs_trace("uname: "SRS_UNAME);
+    srs_trace("build: %s, %s", SRS_BUILD_DATE, srs_is_little_endian()? "little-endian":"big-endian");
+    srs_trace("configure: "SRS_CONFIGURE);
+    
+    if ((ret = _srs_server->initialize()) != ERROR_SUCCESS) {
+        return ret;
+    }
+    
+    if ((ret = _srs_server->acquire_pid_file()) != ERROR_SUCCESS) {
+        return ret;
+    }
     
     return run();
 }