diff --git a/apphouse.js b/apphouse.js
index 432050c..9627cd5 100644
--- a/apphouse.js
+++ b/apphouse.js
@@ -1,19 +1,30 @@
 var config = require('config');
 var AppHouse = require('./lib/apphouse.js');
 var path = require('path');
+var fs = require('fs');
 
 /* Config */
 config.path.app = config.path.app || path.join(__dirname, 'apps');
 config.path.log = config.path.log || path.join(__dirname, 'logs');
 config.path.runtime = config.path.runtime || path.join(__dirname, 'runtime');
 
-/* Initializing Application Manager */
-var appMgr = new AppHouse.AppManager(config.path.app, config.path.log, config.path.runtime, config.admin.tools);
-appMgr.runAll();
+/* Initializing */
+var appMgr;
+var router;
 
-/* Initializing Router */
-var router = new AppHouse.Router(appMgr);
-router.run();
+/* Initializing log directory */
+fs.mkdir(config.path.log, function() {
+	fs.mkdir(path.join(config.path.log, 'apps'), function() {
+
+		/* Initializing Application Manager */
+		appMgr = new AppHouse.AppManager(config.path.app, config.path.log, config.path.runtime, config.admin.tools);
+		appMgr.runAll();
+
+		/* Initializing Router */
+		router = new AppHouse.Router(appMgr);
+		router.run();
+	});
+});
 
 process.on('uncaughtException', function(err) {
 	console.err(err.stack);
@@ -32,8 +43,6 @@ process.on('SIGHUP', function() {
 })
 
 process.on('SIGINT', function() {
-	console.log('Stopping');
-
 	/* Stop all application */
 	appMgr.stopAll(function() {
 		process.exit(1);
diff --git a/lib/app-manager.js b/lib/app-manager.js
index c6f7157..64e1f83 100644
--- a/lib/app-manager.js
+++ b/lib/app-manager.js
@@ -30,8 +30,10 @@ module.exports = function(_path, _logpath, _runtimepath, _tools) {
 		var priv = Priv.instanceList[id];
 
 		/* Start Worker */
+		console.log('Initializing ' + App.appName + '.' + id);
 		var instProcess = priv.process = child_process.fork(workerPath);
 
+		var aaa = 111;
 		/* Auto-restart */
 		instProcess.on('exit', function(code) {
 			var delay = 3000;
@@ -128,10 +130,12 @@ module.exports = function(_path, _logpath, _runtimepath, _tools) {
 
 					case 'appStarted':
 						instance.state = 'running';
+						console.log('Started ' + App.appName + '.' + id);
 
 						/* Application was started, call callback function */
 						if (callback)
 							callback();
+
 						break;
 
 					case 'appInitError':
@@ -204,24 +208,20 @@ module.exports = function(_path, _logpath, _runtimepath, _tools) {
 		/* Initializing runtime environment */
 		runtime.init(id, function(runtimeDir) {
 			runtime.initApp(id, appRealDir, function() {
+				var managerAPIPath = path.join(runtimeDir, 'AppHouseManager');
+
 				/* Export Manager API to this App */
-				var targetLogPath = path.join(runtimeDir, '.AppHouse_logs');
-				path.exists(targetLogPath, function(exists) {
-					if (exists) {
-						child_process.spawn('umount', [ targetLogPath ]);
-						fs.unlink(targetLogPath);
-					}
+				var targetLogPath = path.join(managerAPIPath, 'Logs');
+				var umount = child_process.spawn('umount', [ targetLogPath ]);
+				umount.on('exit', function() {
+					fs.unlink(targetLogPath);
 
 					/* Mounting to export log directory if this app is a manager */
 					if (App.isManager) {
-						path.exists(targetLogPath, function(exists) {
-							if (!exists) {
-								fs.mkdir(targetLogPath, function() {
-									child_process.spawn('mount', [ '--bind', logPath, targetLogPath ]);
-								});
-							} else {
+						fs.mkdir(managerAPIPath, function() {
+							fs.mkdir(targetLogPath, function() {
 								child_process.spawn('mount', [ '--bind', logPath, targetLogPath ]);
-							}
+							});
 						});
 					}
 				});
@@ -352,6 +352,8 @@ module.exports = function(_path, _logpath, _runtimepath, _tools) {
 		var instance = App.instanceList[id];
 		var priv = Priv.instanceList[id];
 
+		console.log('Stopping ' + App.appName + '.' + id);
+
 		if (instance.state == 'stop') {
 			if (callback)
 				callback();
@@ -376,10 +378,45 @@ module.exports = function(_path, _logpath, _runtimepath, _tools) {
 			return;
 		}
 
+		/* update state */
+		instance.state = 'stop';
+
 		if (callback)
 			callback();
 	};
 
+	this._stopApp = function(id, callback) {
+		var App = self.applications[id];
+
+		/* update state */
+		App.state = 'stop';
+
+		/* Release runtime environment */
+		var runtimeDir = runtime.getRuntimeDir(id);
+
+		if (App.isManager) { 
+			/* Directory for manager API */
+			var managerAPIPath = path.join(runtimeDir, 'AppHouseManager');
+
+			/* Release log directory of Manager API */
+			var targetLogPath = path.join(managerAPIPath, 'Logs');
+			var umount = child_process.spawn('umount', [ targetLogPath ]);
+			umount.on('exit', function() {
+				/* Release runtime directory now */
+				runtime.release(id, function() {
+					if (callback)
+						callback();
+				});
+			});
+		} else {
+			/* Release runtime directory now */
+			runtime.release(id, function() {
+				if (callback)
+					callback();
+			});
+		}
+	};
+
 	this.stopApp = function(id, callback) {
 		if (!self.applications[id]) {
 			if (callback)
@@ -388,6 +425,8 @@ module.exports = function(_path, _logpath, _runtimepath, _tools) {
 			return;
 		}
 
+		console.log('Shutting down ' + self.applications[id].appName);
+
 		if (!self.applications[id].state == 'stop') {
 			if (callback)
 				callback();
@@ -409,26 +448,7 @@ module.exports = function(_path, _logpath, _runtimepath, _tools) {
 			if (index < self.applications[id].instanceList.length) {
 				self.stopInstance(index, self.applications[id], self.appPriv[id], sicb);
 			} else {
-				/* update state */
-				self.applications[id].state = 'stop';
-
-				/* Release runtime environment */
-				var runtimeDir = runtime.getRuntimeDir(id);
-
-				/* Release log directory of Manager API */
-				var targetLogPath = path.join(runtimeDir, '.AppHouse_logs');
-				path.exists(targetLogPath, function(exists) {
-					if (exists) {
-						child_process.spawn('umount', [ targetLogPath ]);
-						fs.unlink(targetLogPath);
-					}
-
-					/* Release runtime directory now */
-					runtime.release(id, function() {
-						if (callback)
-							callback();
-					});
-				});
+				self._stopApp(id, callback);
 			}
 		};
 
diff --git a/lib/app-worker/syscall/manager.js b/lib/app-worker/syscall/manager.js
index aa0b478..768e9c5 100644
--- a/lib/app-worker/syscall/manager.js
+++ b/lib/app-worker/syscall/manager.js
@@ -5,6 +5,7 @@ module.exports = function(_process, _ipc) {
 	var self = this;
 	var workerProcess = _process;
 	var ipc = _ipc;
+	var managerPath = path.join('/', 'AppHouseManager');
 
 	this.getAppInfo = function(id, callback) {
 		var callbackID = ipc.register(callback);
@@ -63,7 +64,7 @@ module.exports = function(_process, _ipc) {
 	this.watchLog = function(id, callback) {
 		self.getAppInfo(id, function(app) {
 			var startByte = 0;
-			var appLogfile = path.join('/.AppHouse_logs', 'apps', path.basename(app.appLogPath));
+			var appLogfile = path.join(managerPath, 'Logs', 'apps', path.basename(app.appLogPath));
 
 			fs.stat(appLogfile, function(err, stats){
 				if (err)
@@ -119,7 +120,7 @@ module.exports = function(_process, _ipc) {
 
 	this.unwatchLog = function(id) {
 		self.getAppInfo(id, function(app) {
-			var appLogfile = path.join('/.AppHouse_logs', 'apps', path.basename(app.appLogPath));
+			var appLogfile = path.join(managerPath, 'Logs', 'apps', path.basename(app.appLogPath));
 
 			/* Unwatch log file */
 			fs.unwatchFile(appLogfile);
diff --git a/lib/runtime.js b/lib/runtime.js
index 0a98572..fec022f 100644
--- a/lib/runtime.js
+++ b/lib/runtime.js
@@ -68,10 +68,14 @@ module.exports = function(_runtimepath) {
 	};
 
 	this.initLog = function(id, LogPath, callback) {
-		var link_process = child_process.spawn('ln', [ '-fn', LogPath, path.join(self.getLogDir(id), path.basename(LogPath)) ]);
-		link_process.on('exit', function(code) {
-			if (callback)
-				callback();
+		fs.open(LogPath, 'a', function(err, fd) {
+			fs.close(fd);
+
+			var link_process = child_process.spawn('ln', [ '-fn', LogPath, path.join(self.getLogDir(id), path.basename(LogPath)) ]);
+			link_process.on('exit', function(code) {
+				if (callback)
+					callback();
+			});
 		});
 	};
 
diff --git a/logs/system/apphouse.log b/logs/system/apphouse.log
deleted file mode 100644
index e69de29..0000000