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Rethinking the Network

Marten Terpstra

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Top Stories by Marten Terpstra

Much has been published about the Open Compute Project. Initiated by Facebook, it has become an industry effort focused on standardization of many parts and components in the datacenter. Initially focused on racks, power and server design, it has also added storage and now networking to its fold. Its goal is fairly straightforward: “how can we design the most efficient compute infrastructure possible”, a direct quote from its web site. The focus of OCP has been mostly around hardware designs and specifications. If you look at the networking arm of OCP, you find several Top of Rack (ToR) ethernet switch hardware designs donated by the likes of Broadcom, Mellanox and Intel. By creating open specifications of hardware designs for fairly standard ethernet switches, the industry can standardize on these designs and economics of scale would drive down the cost to create an... (more)

Pay Attention to Big Data By @MartenT1999 | @BigDataExpo [#BigData]

Network Engineers, Pay Attention to Big Data You have probably realized we are having a Big Data kind of week here at the Plexxi blog. And for good reason. The amount of development and change in this big bucket of applications we conveniently label “Big Data”, is astonishing. Walking around at Hadoopworld in New York last week, I initially felt somewhat lost as a “networking guy”. But that feeling of “not belonging” is only superficial, the network has a tremendously important role in these applications. The challenge is that many “networking” folks don’t quite understand or r... (more)

Resiliency in Controller-Based Network Architectures

Last week Ivan Pepelnjak wrote an article about the failure domains of controller based network architectures. At the core of SDN solutions is the concept of a controller, which in most cases lives outside the network devices themselves. A controller as a central entity controlling the network (hence its name) provides very significant values and capabilities to the network. We have talked about these in this blog many times. Centralized Control When introducing a centralized entity into any inherently distributed system, the architecture of such a system needs to carefully consi... (more)

OpenFlow Evolution: Standardized Packet Processing Abstraction Is Hard

With the Open Network Summit 2014 about to start in Santa Clara next week, I realized I had not done much OpenFlow reading recently. It is no secret that Plexxi does not use OpenFlow as the API between our switches and controller due to restrictions in what OpenFlow can do (or in some cases could do when we needed to make architecture and design choices). When I saw the ONS announcement I thought it an opportune moment to sync myself to the latest and greatest in OpenFlow world. What started out as a mechanism to program flows into network switches and routers in a standard way ... (more)

Network Autonomy – Feedback Defined Networking

About 8 years ago at my previous employer we started a project related to Autonomic Networking. Autonomic Networking is modeled after Autonomic Computing, an IBM initiative from the early 2000s, targeted at creating self managing computing elements. The network version intends to create a framework by which network elements become largely self managed. It does so by defining discovery, awareness and analytics that build some sense of state. Once a network has a sense of its expected state, anything that alters that state can be reacted to following a set of defined or even learne... (more)