OpenStack has critical mass and is the de facto standard for deploying open source-based clouds. With increasing levels of investment by service providers like AT&T, Comcast, and Rackspace and infrastructure vendors like Cisco, EMC, HP, IBM, Intel, and Red Hat, OpenStack private cloud/hybrid clouds are becoming a strong alternative to traditional IT models for large enterprises. Moving to the cloud offers the promise of flexibility, scale, and cost savings. However, a standard cloud model is not inherently designed for enterprise-level availability. With multiple points of risk at both the hardware and software layers, many organizations are hesitant to move their business-critical applications to the cloud. Potential costs may outweigh benefits.