How do I use autoscaling effectively with Redis?

    // Example of setting up Redis with Autoscaling on a PHP Application
    // Using AWS Elasticache for Redis with Autoscaling configuration
    
    $redisClient = new Predis\Client([
        'scheme' => 'tcp',
        'host'   => 'your-redis-cluster-endpoint',
        'port'   => 6379,
    ]);

    // Function to handle requests and automatically scale
    function handleRequest($key, $value) {
        global $redisClient;
        try {
            // Set value in Redis
            $redisClient->set($key, $value);
            
            // Get the value from Redis to confirm it was set
            $result = $redisClient->get($key);
            echo "Value for {$key}: {$result}\n";
        } catch (Exception $e) {
            echo "Redis error: " . $e->getMessage();
        }
    }

    // Example usage
    handleRequest('username', 'exampleUser');

    // Remember to monitor and set metrics for autoscaling your Redis instances