diff --git a/trunk/conf/full.conf b/trunk/conf/full.conf
index e3f63dc32..db93554e0 100644
--- a/trunk/conf/full.conf
+++ b/trunk/conf/full.conf
@@ -26,6 +26,10 @@ ff_log_dir          ./objs/logs;
 # if file, write log to file. requires srs_log_file if log to file.
 # default: file.
 srs_log_tank        file;
+# the log level, for all log tanks.
+# can be: verbose, info, trace, warn, error
+# defualt: trace
+srs_log_level       trace;
 # when srs_log_tank is file, specifies the log file.
 # default: ./objs/srs.log
 srs_log_file        ./objs/srs.log;
diff --git a/trunk/src/app/srs_app_config.cpp b/trunk/src/app/srs_app_config.cpp
index aae9f33de..a3be19727 100644
--- a/trunk/src/app/srs_app_config.cpp
+++ b/trunk/src/app/srs_app_config.cpp
@@ -1288,6 +1288,18 @@ string SrsConfig::get_srs_log_file()
     return conf->arg0();
 }
 
+string SrsConfig::get_srs_log_level()
+{
+    srs_assert(root);
+    
+    SrsConfDirective* conf = root->get("srs_log_level");
+    if (!conf || conf->arg0().empty()) {
+        return "trace";
+    }
+    
+    return conf->arg0();
+}
+
 bool SrsConfig::get_srs_log_tank_file()
 {
     srs_assert(root);
diff --git a/trunk/src/app/srs_app_config.hpp b/trunk/src/app/srs_app_config.hpp
index 8a7e995ef..187ec7ab9 100644
--- a/trunk/src/app/srs_app_config.hpp
+++ b/trunk/src/app/srs_app_config.hpp
@@ -149,6 +149,7 @@ public:
     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_level();
     virtual std::string         get_srs_log_file();
     virtual bool                get_deamon();
     virtual int                 get_max_connections();
diff --git a/trunk/src/app/srs_app_hls.cpp b/trunk/src/app/srs_app_hls.cpp
index 4a04ee787..8e3b4481c 100644
--- a/trunk/src/app/srs_app_hls.cpp
+++ b/trunk/src/app/srs_app_hls.cpp
@@ -587,8 +587,8 @@ int SrsHlsMuxer::segment_open(int64_t segment_start_dts)
         srs_error("open hls muxer failed. ret=%d", ret);
         return ret;
     }
-    srs_info("open HLS muxer success. vhost=%s, path=%s, tmp=%s", 
-        vhost.c_str(), current->full_path.c_str(), tmp_file.c_str());
+    srs_info("open HLS muxer success. path=%s, tmp=%s", 
+        current->full_path.c_str(), tmp_file.c_str());
     
     return ret;
 }
diff --git a/trunk/src/app/srs_app_http.cpp b/trunk/src/app/srs_app_http.cpp
index ab40e70c4..df8a55edb 100644
--- a/trunk/src/app/srs_app_http.cpp
+++ b/trunk/src/app/srs_app_http.cpp
@@ -670,7 +670,7 @@ int SrsHttpUri::initialize(std::string _url)
     srs_info("parse url %s success", purl);
     
     query = get_uri_field(url, &hp_u, UF_QUERY);
-    srs_info("parse query %s success", query);
+    srs_info("parse query %s success", query.c_str());
     
     return ret;
 }
diff --git a/trunk/src/app/srs_app_log.cpp b/trunk/src/app/srs_app_log.cpp
index 936a4868a..8c51de2e6 100644
--- a/trunk/src/app/srs_app_log.cpp
+++ b/trunk/src/app/srs_app_log.cpp
@@ -61,10 +61,12 @@ int SrsThreadContext::get_id()
 
 SrsFastLog::SrsFastLog()
 {
-    level = SrsLogLevel::Trace;
+    _level = SrsLogLevel::Trace;
     log_data = new char[LOG_MAX_SIZE];
 
     fd = -1;
+    
+    // TODO: support reload.
 }
 
 SrsFastLog::~SrsFastLog()
@@ -77,9 +79,19 @@ SrsFastLog::~SrsFastLog()
     }
 }
 
+int SrsFastLog::level()
+{
+    return _level;
+}
+
+void SrsFastLog::set_level(int level)
+{
+    _level = level;
+}
+
 void SrsFastLog::verbose(const char* tag, int context_id, const char* fmt, ...)
 {
-    if (level > SrsLogLevel::Verbose) {
+    if (_level > SrsLogLevel::Verbose) {
         return;
     }
     
@@ -94,12 +106,12 @@ void SrsFastLog::verbose(const char* tag, int context_id, const char* fmt, ...)
     size += vsnprintf(log_data + size, LOG_MAX_SIZE - size, fmt, ap);
     va_end(ap);
 
-    write_log(log_data, size, SrsLogLevel::Verbose);
+    write_log(fd, log_data, size, SrsLogLevel::Verbose);
 }
 
 void SrsFastLog::info(const char* tag, int context_id, const char* fmt, ...)
 {
-    if (level > SrsLogLevel::Info) {
+    if (_level > SrsLogLevel::Info) {
         return;
     }
     
@@ -114,12 +126,12 @@ void SrsFastLog::info(const char* tag, int context_id, const char* fmt, ...)
     size += vsnprintf(log_data + size, LOG_MAX_SIZE - size, fmt, ap);
     va_end(ap);
 
-    write_log(log_data, size, SrsLogLevel::Info);
+    write_log(fd, log_data, size, SrsLogLevel::Info);
 }
 
 void SrsFastLog::trace(const char* tag, int context_id, const char* fmt, ...)
 {
-    if (level > SrsLogLevel::Trace) {
+    if (_level > SrsLogLevel::Trace) {
         return;
     }
     
@@ -134,12 +146,12 @@ void SrsFastLog::trace(const char* tag, int context_id, const char* fmt, ...)
     size += vsnprintf(log_data + size, LOG_MAX_SIZE - size, fmt, ap);
     va_end(ap);
 
-    write_log(log_data, size, SrsLogLevel::Trace);
+    write_log(fd, log_data, size, SrsLogLevel::Trace);
 }
 
 void SrsFastLog::warn(const char* tag, int context_id, const char* fmt, ...)
 {
-    if (level > SrsLogLevel::Warn) {
+    if (_level > SrsLogLevel::Warn) {
         return;
     }
     
@@ -154,12 +166,12 @@ void SrsFastLog::warn(const char* tag, int context_id, const char* fmt, ...)
     size += vsnprintf(log_data + size, LOG_MAX_SIZE - size, fmt, ap);
     va_end(ap);
 
-    write_log(log_data, size, SrsLogLevel::Warn);
+    write_log(fd, log_data, size, SrsLogLevel::Warn);
 }
 
 void SrsFastLog::error(const char* tag, int context_id, const char* fmt, ...)
 {
-    if (level > SrsLogLevel::Error) {
+    if (_level > SrsLogLevel::Error) {
         return;
     }
     
@@ -177,7 +189,7 @@ void SrsFastLog::error(const char* tag, int context_id, const char* fmt, ...)
     // add strerror() to error msg.
     size += snprintf(log_data + size, LOG_MAX_SIZE - size, "(%s)", strerror(errno));
 
-    write_log(log_data, size, SrsLogLevel::Error);
+    write_log(fd, log_data, size, SrsLogLevel::Error);
 }
 
 bool SrsFastLog::generate_header(const char* tag, int context_id, const char* level_name, int* header_size)
@@ -219,7 +231,7 @@ bool SrsFastLog::generate_header(const char* tag, int context_id, const char* le
     return true;
 }
 
-void SrsFastLog::write_log(char *str_log, int size, int _level)
+void SrsFastLog::write_log(int& fd, char *str_log, int size, int level)
 {
     // ensure the tail and EOF of string
     //      LOG_TAIL_SIZE for the TAIL char.
@@ -227,8 +239,8 @@ void SrsFastLog::write_log(char *str_log, int size, int _level)
     size = srs_min(LOG_MAX_SIZE - 1 - LOG_TAIL_SIZE, size);
     
     // add some to the end of char.
-    log_data[size++] = LOG_TAIL;
-    log_data[size++] = 0;
+    str_log[size++] = LOG_TAIL;
+    str_log[size++] = 0;
     
     if (fd < 0 || !_srs_config->get_srs_log_tank_file()) {
         // if is error msg, then print color msg.
@@ -236,9 +248,9 @@ void SrsFastLog::write_log(char *str_log, int size, int _level)
         // \033[32m : green text code in shell
         // \033[33m : yellow text code in shell
         // \033[0m : normal text code
-        if (_level <= SrsLogLevel::Trace) {
+        if (level <= SrsLogLevel::Trace) {
             printf("%s", str_log);
-        } else if (_level == SrsLogLevel::Warn) {
+        } else if (level == SrsLogLevel::Warn) {
             printf("\033[33m%s\033[0m", str_log);
         } else{
             printf("\033[31m%s\033[0m", str_log);
diff --git a/trunk/src/app/srs_app_log.hpp b/trunk/src/app/srs_app_log.hpp
index 8200e04c0..4de9cdb2d 100644
--- a/trunk/src/app/srs_app_log.hpp
+++ b/trunk/src/app/srs_app_log.hpp
@@ -54,23 +54,6 @@ public:
     virtual int get_id();
 };
 
-/**
-* the log level, for example:
-* if specified Debug level, all level messages will be logged.
-* if specified Warn level, only Warn/Error/Fatal level messages will be logged.
-*/
-class SrsLogLevel
-{
-public:
-    // only used for very verbose debug, generally, 
-    // we compile without this level for high performance.
-    static const int Verbose = 0x01;
-    static const int Info = 0x02;
-    static const int Trace = 0x03;
-    static const int Warn = 0x04;
-    static const int Error = 0x05;
-};
-
 /**
 * we use memory/disk cache and donot flush when write log.
 */
@@ -78,7 +61,7 @@ class SrsFastLog : public ISrsLog
 {
 private:
     // defined in SrsLogLevel.
-    int level;
+    int _level;
     char* log_data;
     // log to file if specified srs_log_file
     int fd;
@@ -86,6 +69,8 @@ public:
     SrsFastLog();
     virtual ~SrsFastLog();
 public:
+    virtual int level();
+    virtual void set_level(int level);
     virtual void verbose(const char* tag, int context_id, const char* fmt, ...);
     virtual void info(const char* tag, int context_id, const char* fmt, ...);
     virtual void trace(const char* tag, int context_id, const char* fmt, ...);
@@ -93,7 +78,7 @@ public:
     virtual void error(const char* tag, int context_id, const char* fmt, ...);
 private:
     virtual bool generate_header(const char* tag, int context_id, const char* level_name, int* header_size);
-    virtual void write_log(char* str_log, int size, int _level);
+    static void write_log(int& fd, char* str_log, int size, int level);
 };
 
 #endif
diff --git a/trunk/src/app/srs_app_server.cpp b/trunk/src/app/srs_app_server.cpp
index 475bfd8dc..358900c5c 100644
--- a/trunk/src/app/srs_app_server.cpp
+++ b/trunk/src/app/srs_app_server.cpp
@@ -149,8 +149,6 @@ int SrsListener::cycle()
         return ret;
     }
     
-    srs_verbose("accept client finished. conns=%d, ret=%d", (int)conns.size(), ret);
-    
     return ret;
 }
 
@@ -493,13 +491,15 @@ int SrsServer::accept_client(SrsListenerType type, st_netfd_t client_stfd)
     
     // directly enqueue, the cycle thread will remove the client.
     conns.push_back(conn);
-    srs_verbose("add conn from port %d to vector. conns=%d", port, (int)conns.size());
+    srs_verbose("add conn to vector.");
     
     // cycle will start process thread and when finished remove the client.
     if ((ret = conn->start()) != ERROR_SUCCESS) {
         return ret;
     }
-    srs_verbose("conn start finished. ret=%d", ret);
+    srs_verbose("conn started success   .");
+
+    srs_verbose("accept client finished. conns=%d, ret=%d", (int)conns.size(), ret);
     
     return ret;
 }
diff --git a/trunk/src/core/srs_core.hpp b/trunk/src/core/srs_core.hpp
index 774151bf5..4e7fd507c 100644
--- a/trunk/src/core/srs_core.hpp
+++ b/trunk/src/core/srs_core.hpp
@@ -31,7 +31,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 // current release version
 #define VERSION_MAJOR "0"
 #define VERSION_MINOR "9"
-#define VERSION_REVISION "44"
+#define VERSION_REVISION "45"
 #define RTMP_SIG_SRS_VERSION VERSION_MAJOR"."VERSION_MINOR"."VERSION_REVISION
 // server info.
 #define RTMP_SIG_SRS_KEY "srs"
diff --git a/trunk/src/kernel/srs_kernel_log.cpp b/trunk/src/kernel/srs_kernel_log.cpp
index 20d25495f..59d3bac38 100644
--- a/trunk/src/kernel/srs_kernel_log.cpp
+++ b/trunk/src/kernel/srs_kernel_log.cpp
@@ -31,6 +31,15 @@ ISrsLog::~ISrsLog()
 {
 }
 
+int ISrsLog::level()
+{
+    return SrsLogLevel::Trace;
+}
+
+void ISrsLog::set_level(int /*level*/)
+{
+}
+
 void ISrsLog::verbose(const char* /*tag*/, int /*context_id*/, const char* /*fmt*/, ...)
 {
 }
diff --git a/trunk/src/kernel/srs_kernel_log.hpp b/trunk/src/kernel/srs_kernel_log.hpp
index 8d507d6dd..7574c25ba 100644
--- a/trunk/src/kernel/srs_kernel_log.hpp
+++ b/trunk/src/kernel/srs_kernel_log.hpp
@@ -35,6 +35,23 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #include <errno.h>
 #include <string.h>
 
+/**
+* the log level, for example:
+* if specified Debug level, all level messages will be logged.
+* if specified Warn level, only Warn/Error/Fatal level messages will be logged.
+*/
+class SrsLogLevel
+{
+public:
+    // only used for very verbose debug, generally, 
+    // we compile without this level for high performance.
+    static const int Verbose = 0x01;
+    static const int Info = 0x02;
+    static const int Trace = 0x03;
+    static const int Warn = 0x04;
+    static const int Error = 0x05;
+};
+
 /**
 * the log interface provides method to write log.
 * but we provides some macro, which enable us to disable the log when compile.
@@ -46,6 +63,11 @@ public:
     ISrsLog();
     virtual ~ISrsLog();
 public:
+    /**
+    * defined in SrsLogLevel.
+    */
+    virtual int level();
+    virtual void set_level(int level);
     /**
     * log for verbose, very verbose information.
     */
diff --git a/trunk/src/main/srs_main_server.cpp b/trunk/src/main/srs_main_server.cpp
index e20fe131a..1607c1c8c 100644
--- a/trunk/src/main/srs_main_server.cpp
+++ b/trunk/src/main/srs_main_server.cpp
@@ -157,6 +157,21 @@ int main(int argc, char** argv)
         return ret;
     }
     
+    // config parsed, initialize log.
+    if ("verbose" == _srs_config->get_srs_log_level()) {
+        _srs_log->set_level(SrsLogLevel::Verbose);
+    } else if ("info" == _srs_config->get_srs_log_level()) {
+        _srs_log->set_level(SrsLogLevel::Info);
+    } else if ("trace" == _srs_config->get_srs_log_level()) {
+        _srs_log->set_level(SrsLogLevel::Trace);
+    } else if ("warn" == _srs_config->get_srs_log_level()) {
+        _srs_log->set_level(SrsLogLevel::Warn);
+    } else if ("error" == _srs_config->get_srs_log_level()) {
+        _srs_log->set_level(SrsLogLevel::Error);
+    } else {
+        _srs_log->set_level(SrsLogLevel::Trace);
+    }
+    
     srs_trace("srs(simple-rtmp-server) "RTMP_SIG_SRS_VERSION);
     srs_trace("uname: "SRS_UNAME);
     srs_trace("build: %s, %s", SRS_BUILD_DATE, srs_is_little_endian()? "little-endian":"big-endian");