Server virtualization is an ever more important tool for reducing cost, increasing availability, and enhancing business agility. But for many organizations, the savings that come from server consolidation are the primary reason for server virtualization. Many of virtualization’s additional benefits—including built-in, cost-effective high availability (HA) and disaster recovery (DR)—require external shared storage with a comprehensive feature set to support them. Without proper planning, it is all too easy to see the savings from server virtualization be misdirected toward inefficient storage systems. IP SANs are frequently seen as overcoming cost and management limitations of traditional storage area networks (SANs) and are becoming very popular in virtualized server environments.
This white paper describes the advantages of scale-out iSCSI storage in four areas—cost, high availability and disaster recovery, performance, and management—and illustrates how SANs provide better overall support for virtualized environments.