$config['cache']['enabled'] = true;
$config['cache']['backend'] = 'File';
$config['cache']['backendOptions'] = array('cache_dir' => '/usr/home/w****/public_html/community/internal_data/cache');
$config['cache']['frontend'] = 'Core';
$config['cache']['frontendOptions'] = array('caching' => true,
'automatic_serialization' => true,
'lifetime' => 1800);