If you peer inside the data center of a large healthcare organization, you’re bound to see at least three separate fabrics being supported: Ethernet for the LAN, Fibre Channel for the storage area network, and the specialized Infiniband for high-performance computing (HPC). Keeping with our discussion on the characteristics of the next-generation data center, managing three separate fabrics is hardly the path to simplification.
However, it’s understandable why you’re holding onto this type of architecture – to unify, you’d need an underlying network technology that could handle the unique demands of all three environments. Gigabit Ethernet alone is often not robust enough to deal with the I/O requirements of HPC and large-scale SANs. Fibre Channel and Infiniband are expensive technologies that need highly trained staff. In a time of tight budgets, the double whammy of costly hardware and training is not a recipe for success.
Over the next few years, you’ll see the adoption of a unified network fabric based on Fibre Channel over Ethernet (FCoE) as it evolves and becomes more commonplace in network gear. FCoE enables large data centers dealing with tremendous traffic and storage loads to preserve the benefits of Fibre Channel, which has a strong installed base, while taking advantage of the ubiquity of Ethernet deployments and common skill sets.
Although work on the FCoE standard was finalized last year, there are still significant components that need to be completed to ensure the reliability that users have with traditional Fibre Channel. For instance, there are protocols in the works still to deal with congestion notification, enhanced transmission selection and priority-based flow control. All of these are working their way through the IEEE’s standards process.
As you wait for these piece parts to be settled out, it’s important that you start to look at the most critical element of FCoE’s success – 10G Ethernet. For FCoE to be able to handle the load as gracefully as its counterparts, it needs the workhorse that is 10G switching. Think about the I/O you’ll need to handle electronic medical record requests, backup and storage. Or how much power you’ll need to deal with real-time diagnosing using medical images and other hefty files.
The migration to 10G Ethernet in the near term offers you many benefits beyond the future support of FCoE. Since 10G delivers 10 times the bandwidth of Gigabit Ethernet, healthcare organizations can reduce the Gigabit Ethernet NICs they need in highly virtualized environments. Rather than use as many as four to eight Gigabit Ethernet NICs in each server, you can deploy just two 10G Ethernet NICs and achieve full redundancy and availability while increasing bandwidth per virtual machine.
Consolidating around 10G, Gigabit Ethernet network I/O also dramatically reduces the number of Gigabit Ethernet ports, upstream switch ports and cables you need to deploy and manage. And it puts you in line with the goal we’ve outlined over the past few blogs – a flatter network architecture. As a bonus, fewer ports and switches lead to reduced power and cooling. Both of these outcomes are the essence of the next-generation data center.