Author Archives: Larry Peterson

About Larry Peterson

As Chief Scientist, Larry Peterson provides technical leadership and expertise for research and development projects. He is also the Robert E. Kahn Professor of Computer Science at Princeton University, where he served as Chairman of the Computer Science Department from 2003-2009. He also serves as Director of the PlanetLab Consortium, a collection of academic, industrial, and government institutions cooperating to design and evaluate next-generation network services and architectures. Larry has served as Editor-in-Chief of the ACM Transactions on Computer Systems, has been on the Editorial Board for the IEEE/ACM Transactions on Networking and the IEEE Journal on Select Areas in Communication and is the co-author of the best selling networking textbook Computer Networks: A Systems Approach. He is a member of the National Academy of Engineering, a Fellow of the ACM and the IEEE, and the 2010 recipient of the IEEE Kobayahi Computer and Communication Award. He received his Ph.D. degree from Purdue University in 1985.
 

SDN in the Operator Network

I’ve written before about the power of delivering CDN and related services on virtualized commodity servers deployed deep in operator networks (see Extending the Cloud to the Network Edge and A Perfect Storm). The arguments in favor of such an … Continue reading

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From Caches to CDNs

With an assortment of open source proxy caches readily available (e.g., NGINX, Varnish, ATS), it isn’t surprising to hear network operators ask about the value of commercial CDN solutions. After all, how hard can it be to build a CDN … Continue reading

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CDNI at IETF

Now a full-fledged IETF Working Group, CDN Interconnection (CDNI) is making sure and steady progress towards a common understanding of the problem space, but is treading precariously close to several slippery slopes. The risk to producing a practical set of … Continue reading

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Transparent Caching: A Means Rather than an End

[This article originally appeared as a guest post on Broadband Traffic Management Blog.] Transparent caching is often viewed as something distinct from an Operator CDN—it is used to cache over-the-top (OTT) content from content providers and aggregators with which the … Continue reading

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Devices vs Services

Having spent my career in the IT world, where I’ve participated in the design of high-level services, including CDN-related technologies, I now find myself helping to make a case for why network operators should consider CDNs as a core element … Continue reading

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Asynchronous Multicast

Multicast is widely regarded as an essential part of live (linear) content delivery, but there is an intriguing alternative. The case for multicast is straightforward—content delivered down a multicast tree traverses internal network links only once. But a second “content … Continue reading

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Posted in CDN Architecture, HTTP Adaptive Streaming | Tagged , , , | 4 Comments

A Perfect Storm

In an earlier post I argued that CDNs are the killer app that will pull the cloud to the edge of the network. The storyline is straightforward. The explosion of video is causing operators to deploy caches deeper in their … Continue reading

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DNS Extension Good for Operator CDNs

The ongoing effort to add a client subnet extension to DNS has recently gained attention due to its being a center-piece of The Global Internet Speedup initiative. The idea behind the extension is simple – to include in DNS request … Continue reading

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Posted in CDN Architecture | 2 Comments

Measurement Lab Tracking Broadband Usage

I often use this forum to talk about the impact of increasing video traffic on operator networks, but it usually goes unstated that the impact is a combination of more video content being made available and more users with sufficiently … Continue reading

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Posted in Network Measurement | 2 Comments

Impressions from CDN World Forum

I just returned from the CDN World Forum with two take-aways… The first involves the relationship between CDNs and the Cloud, a topic that was front-and-center at the CDN World Forum for the simple reason that it was co-located with … Continue reading

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