diff --git a/trunk/conf/full.conf b/trunk/conf/full.conf
index 82250c703..cf1446bc0 100644
--- a/trunk/conf/full.conf
+++ b/trunk/conf/full.conf
@@ -38,6 +38,7 @@ srs_log_file        ./objs/srs.log;
 # default: 2000
 max_connections     1000;
 # whether start as deamon
+# @remark: donot support reload.
 # default: on
 daemon              on;
 
@@ -66,7 +67,7 @@ http_api {
 # user can access the http server pages, generally:
 #       curl http://192.168.1.170:80/srs.html
 # which will show srs version and welcome to srs.
-# @remeark, the http embeded stream need to config the vhost, for instance, the __defaultVhost__
+# @remark, the http embeded stream need to config the vhost, for instance, the __defaultVhost__
 # need to open the feature http of vhost.
 http_stream {
     # whether http streaming service is enabled.
diff --git a/trunk/src/app/srs_app_config.cpp b/trunk/src/app/srs_app_config.cpp
index 623fd464d..0b6a8d620 100644
--- a/trunk/src/app/srs_app_config.cpp
+++ b/trunk/src/app/srs_app_config.cpp
@@ -554,7 +554,7 @@ int SrsConfig::reload()
     }
 
     // directly supported for reload:
-    // chunk_size, ff_log_dir
+    // chunk_size, ff_log_dir, max_connections
     
     // merge config: pithy_print
     if (!srs_directive_equals(root->get("pithy_print"), old_root->get("pithy_print"))) {
@@ -643,6 +643,17 @@ int SrsConfig::reload()
         // merge config: vhost modified.
         srs_trace("vhost %s modified, reload its detail.", vhost.c_str());
         if (get_vhost_enabled(new_vhost) && get_vhost_enabled(old_vhost)) {
+            // atc, only one per vhost
+            if (!srs_directive_equals(new_vhost->get("atc"), old_vhost->get("atc"))) {
+                for (it = subscribes.begin(); it != subscribes.end(); ++it) {
+                    ISrsReloadHandler* subscribe = *it;
+                    if ((ret = subscribe->on_reload_atc(vhost)) != ERROR_SUCCESS) {
+                        srs_error("vhost %s notify subscribes atc failed. ret=%d", vhost.c_str(), ret);
+                        return ret;
+                    }
+                }
+                srs_trace("vhost %s reload atc success.", vhost.c_str());
+            }
             // gop_cache, only one per vhost
             if (!srs_directive_equals(new_vhost->get("gop_cache"), old_vhost->get("gop_cache"))) {
                 for (it = subscribes.begin(); it != subscribes.end(); ++it) {
diff --git a/trunk/src/app/srs_app_reload.cpp b/trunk/src/app/srs_app_reload.cpp
index 0747b395d..7fb5facd0 100644
--- a/trunk/src/app/srs_app_reload.cpp
+++ b/trunk/src/app/srs_app_reload.cpp
@@ -75,6 +75,11 @@ int ISrsReloadHandler::on_reload_vhost_removed(string /*vhost*/)
     return ERROR_SUCCESS;
 }
 
+int ISrsReloadHandler::on_reload_atc(string /*vhost*/)
+{
+    return ERROR_SUCCESS;
+}
+
 int ISrsReloadHandler::on_reload_gop_cache(string /*vhost*/)
 {
     return ERROR_SUCCESS;
diff --git a/trunk/src/app/srs_app_reload.hpp b/trunk/src/app/srs_app_reload.hpp
index f01c700a1..d2a5198ee 100644
--- a/trunk/src/app/srs_app_reload.hpp
+++ b/trunk/src/app/srs_app_reload.hpp
@@ -49,6 +49,7 @@ public:
     virtual int on_reload_pithy_print();
     virtual int on_reload_vhost_added(std::string vhost);
     virtual int on_reload_vhost_removed(std::string vhost);
+    virtual int on_reload_atc(std::string vhost);
     virtual int on_reload_gop_cache(std::string vhost);
     virtual int on_reload_queue_length(std::string vhost);
     virtual int on_reload_forward(std::string vhost);
diff --git a/trunk/src/app/srs_app_source.cpp b/trunk/src/app/srs_app_source.cpp
index 41b96fbeb..8d081e6ca 100644
--- a/trunk/src/app/srs_app_source.cpp
+++ b/trunk/src/app/srs_app_source.cpp
@@ -484,6 +484,25 @@ SrsSource::~SrsSource()
     srs_freep(req);
 }
 
+int SrsSource::on_reload_atc(string vhost)
+{
+    int ret = ERROR_SUCCESS;
+    
+    if (req->vhost != vhost) {
+        return ret;
+    }
+    
+    // atc changed.
+    bool enabled_atc = _srs_config->get_atc(vhost);
+    
+    srs_warn("vhost %s atc changed to %d, connected client may corrupt.", 
+        vhost.c_str(), enabled_atc);
+    
+    gop_cache->clear();
+    
+    return ret;
+}
+
 int SrsSource::on_reload_gop_cache(string vhost)
 {
     int ret = ERROR_SUCCESS;
diff --git a/trunk/src/app/srs_app_source.hpp b/trunk/src/app/srs_app_source.hpp
index 2f5490643..7ccfb492f 100644
--- a/trunk/src/app/srs_app_source.hpp
+++ b/trunk/src/app/srs_app_source.hpp
@@ -266,6 +266,7 @@ public:
     virtual ~SrsSource();
 // interface ISrsReloadHandler
 public:
+    virtual int on_reload_atc(std::string vhost);
     virtual int on_reload_gop_cache(std::string vhost);
     virtual int on_reload_queue_length(std::string vhost);
     virtual int on_reload_forward(std::string vhost);