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Category Archives: CDN Architecture
Verivue Voices
LARRY
PETERSON
Chief Scientist
JIM DOLCE
CEO
CDN-as-a-Platform for Cloud Services
I’ve recently posted several articles about the advantages of running network functions on virtualized commodity servers, and while it’s important to make the general case for replacing purpose-built hardware appliances with commodity servers, there’s a more focused story centered around … Continue reading
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
Posted in CDN Architecture
Tagged ATS, CDN, CDN solution, commercial CDN, NGINX, open source proxy caches, Varnish, Verivue
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When “Seems Logical” Isn’t
As network operators faced with steady increases in streaming media turn to CDN technology to reduce network load and improve QoE, router vendors have begun to heavily promote the concept of caching on proprietary router blades. This, the vendors say, … Continue reading
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
Posted in CDN Architecture, Cloud Computing
Tagged CDN, content delivery banwith, Verivue
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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
Posted in CDN Architecture, HTTP Adaptive Streaming
Tagged asynchronous multicast, CDN, linear content delivery, Verivue
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The Case for Integration
Managing the cost and performance of content delivery is becoming ever more important—and more complicated—as operators contend with distributing their own premium content while simultaneously supporting the growth of popular over-the-top services like Netflix and Hulu. Hence, it’s no surprise … Continue reading
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
Posted in CDN Architecture
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The Business of Supporting Tablet Users
Tablets have been generating a lot of news lately, and I think it’s interesting that almost all of it has focused on the tablet as a gadget and not the tablet as a conduit. It’s not about the tablet, as … Continue reading
Silos versus Capacity
While dealing with the explosion of video content is a common theme driving operator interest in CDNs, it remains the case that each operator is experiencing its own specific points-of-pain. For some, it’s the need to scale delivery of their … Continue reading
Content Routing
Content routing is one of the most important aspects of a CDN’s design, but also one of the most easily confused. I find that the following somewhat unorthodox perspective is helpful in teasing apart the design decisions. Starting from first … Continue reading