Drupal 7 + Memcached on CentOS 6

yum install memcached

sudo pecl install channel://pecl.php.net/memcache-3.0.6

memcache.hash\_strategy=consistent

$conf['cache_backends'][] = 'sites/all/modules/memcache/memcache.inc';
// The 'cache_form' bin must be assigned no non-volatile storage.
$conf['cache_class_cache_form'] = 'DrupalDatabaseCache';
$conf['cache_default_class'] = 'MemCacheDrupal';
$conf['memcache_key_prefix'] = 'something_unique';
// Don't bootstrap the database when serving pages from the cache.
$conf['page_cache_without_database'] = TRUE;
$conf['page_cache_invoke_hooks'] = FALSE;

$conf['memcache_stampede_protection'] = TRUE;
$conf['lock_inc'] = 'sites/all/modules/memcache/memcache-lock.inc';