This document provides step-by-step instructions for creating a high availability SQL Server 2008 R2 cluster with two nodes using Microsoft Cluster Service on Windows Server 2008 R2. It discusses SQL clustering requirements, changes in Windows 2008/R2 related to clustering, and considerations for installing and configuring a two-node SQL cluster. The document also references additional technologies like Network Load Balancing that can provide further redundancy and scalability beyond normal clustering constraints.