A great deal of attention has historically been paid to Ethernet speed transitions in the market. Networking vendors, consumers, and industry analysts closely follow these transitions, because they can trigger new technology buying cycles and periods of rapid change in the Ethernet performance-cost curve.
The rise of cloud computing and scale-out data centers has driven the latest Ethernet speed transitions, evidenced by the explosive growth in server-facing 10-Gbit/s ports this decade, and more recently the breakout in 40-Gbit/s Ethernet deployment — particularly in the leaf-to-spine layer of the data center — to an expected 2.5 million-plus ports in 2014. As big data becomes bigger, virtual machines grow in number, and cloud workloads become more demanding, it is expected that the largest cloud operators will soon shift to 100-Gbit/s Ethernet fabrics for the spine layer of their networks.
But what happens to the server- and storage-facing Ethernet downlinks when leaf-to-spine optical links migrate to 100-Gbit/s Ethernet and CPU/storage endpoints demand greater than 10-Gbit/s network connections? These downlinks represent the largest number of cables deployed in mega-scale data centers (MSDCs), where cabling costs dominate.
The case for new standards for 100GE. #Cloud #Datacenters
By Rochan Sankar