private static function remAllKeys() { $keys = array(); $prefix_key = Key::getIndexKey(); $prefixes = self::$_redis->smembers($prefix_key); foreach ($prefixes as $prefix) { $suffixes = self::$_redis->smembers($prefix); foreach ($suffixes as $suffix) { $keys[] = Key::fromString($prefix . ":" . $suffix); } } return $keys; }