In an environment where cloud-scaling applications is becoming more and more important, client-server architectures paradigms, as shown by memcached, are back with vengeance. In this talk, Galder will talk about Hot Rod, Infinispan's new client/server binary protocol, explaining the key differences compared to memcached's binary protocol, such as the possibility of receiving cluster topology changes. Audience of this talk will learn of the importance of Hot Rod in 'cloud-scale' application server clustering, where stateless application server instances could use Infinispan Hot Rod clients to retrieve state from an elastic farm of Infinispan Hot Rod servers, improving capabilities to run application server instances as a PaaS. The talk will finish with a brief demo of a cluster of Infinispan Hot Rod servers running on EC2 being accessed from a non-Java client. The audience is expected to have an intermediate understanding of client-server software architectures and cloud deployments.