With approximately 2.4 million subscribers, Vonage maintains and operates a VoIP network that supports more than 6 billion communications per year to more than 60 countries. Located at corporate headquarters in Holmdel, N.J., is the Vonage Development and QA Lab. It’s here that new technology and products are evaluated before they can enter a production environment. The lab also is where the company's IT architects and engineers develop and certify the standard hardware and software images that will be used in production systems ranging from front-end Web servers to back-end database servers.
Taking advantage of technologies that will allow the company to consolidate infrastructure, reduce costs and speed new server deployments, the Holmdel data center is migrating from a mostly non-virtualized, "discrete" environment to a virtualized data center. This installation features about 40 data center cabinets with 1,100 rack-mount servers, each dedicated to specific applications. The power-hungry rack servers are connected to data center LANs and SANs by more than 3,000 cables, and deploying a new server takes about two weeks from the time a user makes a request.
The migration from discrete data center to virtualized data center involves many new technologies, products and processes. Blade servers, server virtualization and network virtualization stand out as technologies that are key to slashing costs while maintaining application performance and availability.
--Blade servers: Vonage is deploying HP ProLiant BL490c G7 blade servers to perform the same function as rack servers but with far less floor space, power, cooling and cables. By sharing resources through a single enclosure, blade servers will also eliminate a great deal of management complexity and overlap.
--Server virtualization: A typical application server utilizes only 1% to 5% of available CPU. Server virtualization allows Vonage to fully utilize the compute power of each physical blade server by running multiple virtual machines (VMs) and applications. The result is another level of massive consolidation and cost savings.
--Network virtualization: To accommodate the proliferation of VMs, the HP BladeSystems feature virtual networking capabilities that allow server admins to configure unique virtual networks for each VM. Embedded on G7 servers used by Vonage are dual-port integrated HP Virtual Connect 10-Gbit FlexFabric Adapters, which are based on Emulex OneConnect technology. A single HP 10-Gbit FlexFabric Adapter port can be configured as four FlexNICs, with an option to configure one as a FlexHBA for either Fibre Channel or iSCSI storage connectivity. Each FlexNIC or FlexHBA can be configured with its own set of network policies tailored to the needs of specific VMs and applications.
Once Vonage architects got started, they realized the bar was set high. The 1,100 rack servers that form the company's discrete production environment are highly tuned for maximum performance and availability. The rest of the IT team was skeptical that a mass migration to virtual servers could be accomplished without compromising one or both. Therefore, the first step was to pilot the technology with a single blade system chassis and two server blades.