Setting up Cakephp & memcache

Changed in version 2.5: The Memcached engine was added. And the Memcache engine was deprecated.

• Caching — CakePHP Cookbook 2.x documentation

Try using the “Memcached” engine instead:

Cache::config('default', array('engine' => 'Memcached'));

I tried to change it to ‘memcached’ in bootstrap.php

Cache::config('default', array('engine' => 'Memcached'));

Error :

Cache engine default is not available.

After that, I update core.php with this configuration below but got a fatal error.

Cache::config('default', array(
		'engine' => 'Memcached', //[required]
		'duration' => 3600, //[optional]
		'probability' => 100, //[optional]
 		'prefix' => Inflector::slug(APP_DIR) . '_', //[optional]  prefix every cache file with this string
 		'servers' => array(
 			'127.0.0.1:11211' // localhost, default port 11211
			
 		), //[optional]
 		'persistent' => 'my_connection', // [optional] The name of the persistent connection.
 		'compress' => false, // [optional] compress data in Memcached (slower, but uses less memory)
	));

Error :

Fatal error: Uncaught exception 'CacheException' with message 'Cache engine default is not available.' in /var/www/html/my/lib/Cake/Cache/Cache.php:173 Stack trace: #0 /var/www/html/my/lib/Cake/Cache/Cache.php(151): Cache::_buildEngine('default') #1 /var/www/html/my/app/Config/core.php(410): Cache::config('default', Array) #2 /var/www/html/my/lib/Cake/Core/Configure.php(72): include('/var/www/html/m...') #3 /var/www/html/my/lib/Cake/bootstrap.php(175): Configure::bootstrap(true) #4 /var/www/html/my/app/webroot/index.php(90): include('/var/www/html/m...') #5 {main} thrown in /var/www/html/my/lib/Cake/Cache/Cache.php on line 173

Are there any settings in core.php ?