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The Dawn of Converged I/O

Michael Vizard

One thing that contributes so much to the complexity of our data centers is the sheer number of adapters required to support every type of networking and storage protocol moving across the network. But if we take a giant step back from all the hype surrounding data center convergence, it's really at its simplest level all about reducing the number of adapters required.

This has become especially important because IT organizations have discovered that as they consolidate servers and entire data centers, the amount of physical complexity that needs to be managed winds up increasing because of all the adapters required. And while the switches will be much faster, that only means that the actual number of connections that need to be effectively managed is only going to increase. When you think about it, faster switches are roughly equivalent to expanding the lanes on a highway.  The traffic doesn't wind up going any faster because more vehicles invariably wind up on the road.

As IT organizations ponder what the next generation of servers and data centers should look like, Dominic Wilde, the senior director of global product line marketing for 3Com, which is in the process of being acquired by Hewlett-Packard, suggests that chief technologists should pay attention to the following concepts:

Transparent Interconnections for Lots of Links (TRILL): A protocol put forward under the auspices of the Internet Engineering Task Force (IETF) that combines the attributes of bridges and routers.

Virtual Ethernet Port Aggregator (VEPA): An emerging IEEE 802.1bg standard for integrating virtual and physical switches.

Clos Networks: An old idea pioneered by telecommunications carriers for creating multistage switching networks.

As Wilde notes, the world of network switching in the context of next generation data centers is going to be all about how to best manage complexity brought on by the presence of thousands of virtual servers all trying to access the same physical resources. That means that if IT organizations want to have systems capable of dealing with the traffic that these virtual servers will generate tomorrow, they need to start putting the types of systems in place today. And as well all know, tomorrow comes a lot sooner than most of us ever think.


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