In this technical session, we will look at how you can scale the database horizontally behind Magento. We will discuss the reasons for scaling through replication and how this may impact on your infrastructure, deployment and Magento implementation. Replication brings with it a great deal of benefits but also some pitfalls and potential problems with things such as high rates of data change. We will present simple solutions with MySQL replication and also using Tungsten by Continuent to bring high availability and high performance to MySQL. This will be backed by real data and metrics from one of the highest volume Magento stores in the UK showing how Magento can be deployed at scale with high availability to serve the UK, USA and Australia from a single implementation generating over $100 million in revenue.