Most developers are familiar with the concept of scaling out their application tier; with SQL Azure Federations it is now possible to scale out the data tier as well. In this session we will deep dive on building large scale solutions on SQL Azure. In this session we will cover patterns and techniques for building scalability into your relational databases. SQL Azure Federations allow databases to be spread over 100s of nodes in the Azure datacentre with databases paid for by the day. This presents a unique avenue for dealing with particularly massive volumes of data, of user load, or both. This session will discuss how to design a schema for federation scale-out while still maintaining the value afforded by a true relational (SQL) database. We’ll look at approaches for minimizing cross federation queries and as well as approaches to fan-out queries when necessary. We will examine approaches for dealing with elastically scaling applications and other high load scenarios.