Mastering VMware vSphere™ 4

11.1. Clustering Virtual Machines

Let's start with the most well-known technique for helping administrators achieve high availability: Microsoft Clustering Service (MSCS), or failover clustering as it is called in Windows 2008. Failover clustering in Windows 2008 is used when critical services and applications call for the highest levels of availability. Microsoft Windows Server 2003 and 2008 both support network load balancing (NLB) clusters as well as server clusters depending on the version of the Windows Server operating system that is installed on the server. Moving forward, I'll just use the term Microsoft Clustering Service or MSCS to describe any forms or versions of Windows clustering.

11.1.1. Microsoft Clustering

The NLB configuration ...