Case Study: Using Microsoft Office SharePoint Server to implement a large-scale content storage scenario with rapid search availability

This paper presents the key decision points, architecture design and definition, and test criteria and results from a scalability and performance test conducted at the Microsoft Partner Solutions Center (MPSC) in Redmond, Washington. It is intended to provide strategic information about designing a high-volume, high-availability enterprise solution that can easily grow.

It's here : https://technet.microsoft.com/en-us/library/cc262067(TechNet.10).aspx