Install redis module (http://drupal.org/project/redis) and put https://github.com/nrk/predis into ‘sites/all/libraries’ and put these settings into settings.php file
define('PREDIS_BASE_PATH', DRUPAL_ROOT . '/sites/all/libraries/predis-0.8/lib/'); $conf['redis_client_interface'] = 'Predis'; $conf['cache_backends'][] = 'sites/all/modules/contrib/redis/redis.autoload.inc'; $conf['cache_class_cache'] = 'Redis_Cache'; $conf['cache_class_cache_form'] = 'Redis_Cache'; $conf['cache_class_cache_views'] = 'Redis_Cache'; $conf['cache_class_cache_page'] = 'Redis_Cache'; $conf['cache_class_cache_menu'] = 'Redis_Cache'; $conf['cache_class_cache_path'] = 'Redis_Cache'; $conf['cache_class_cache_entity_node'] = 'Redis_Cache'; $conf['cache_class_cache_entity_taxonomy_term'] = 'Redis_Cache'; $conf['cache_class_cache_entity_taxonomy_vocabulary'] = 'Redis_Cache'; $conf['cache_class_cache_entity_file'] = 'Redis_Cache'; $conf['cache_class_cache_entity_user'] = 'Redis_Cache'; $conf['cache_class_cache_filter'] = 'Redis_Cache'; $conf['cache_class_cache_admin_menu'] = 'Redis_Cache'; $conf['cache_class_cache_bootstrap'] = 'Redis_Cache'; $conf['lock_inc'] = 'sites/all/modules/contrib/redis/redis.lock.inc'; $conf['redis_client_base'] = 1; $conf['cache_class_cache_field'] = 'Redis_Cache';