Duncan Epping is a Consulting Architect working for VMware as part of the Cloud Practice. Duncan works primarily with Service Providers and large Enterprise customers. He is focused on designing Public Cloud Infrastructures and specializes in bc-dr, vCloud and VMware HA. Duncan is a VMware Certified Professional and among the first VMware Certified Design Experts (VCDX 007). Duncan is the owner of Yellow-Bricks.com, one of the leading VMware/virtualization blogs worldwide (recently voted number 1 worldwide on vsphere-land.com) and co-author of the "vSphere Quick Start Guide" and "Foundation for Cloud Computing with VMware vSphere 4," which has recently been published by Usenix/Sage (#21 in the Short Topics Series). He can be followed on twitter at http://twitter.com/DuncanYB.