CDN federation workshop
Vendors, stop developing proprietary CDN federation stuff. Standards bodies, stop thinking of academic CDN federation ideas.
Join our CDN federation workshop instead! On Content Delivery Summit (Mon Oct 17 2011), Jet-Stream CEO Stef van der Ziel and Marc Latouche from Cisco will lead a hands-on workshop of just 50 minutes, introducing you to CDN federation experiences, projects, technologies and challenges. The audience is expected to pro-actively take part of the workshop.
Since most CDN federation ideas have been coming from telecom operators and vendors, it is now time to let content owners add their requirements. What do you need as a content owner? Delivery guarantees, capacity guarantees, performance guarantees, federated CDN tree transparency, federated CDN tree control, federated CDN performance feedback? How about SLAs in the value chain? What about respecting content integrity?
This is your chance to get your feedback in. Join the CDN Federation Workshop on Mon Oct 17, the Hilton Olympia Hotel, London!
Make sure you get your early registration discount by registering within the next 36 hours.
2011-09-08 00:00:00 | Event
Jet-Stream speaks on IBC
Join the IBC DMH Theatre on Monday 12, 2:00 PM, hall 9 A.20 for a presentation by Jet-Stream CEO Stef van der Ziel about professionalizing online media delivery.
All our IBC meeting slots for the entire week are filled. We only have non-private sessions slots free on Monday between 1:00PM and 3:00PM if you want to meet us and discuss the next generation of CDN technologies. If you want to join us then or for the Monday Happy Hour from 5:00PM to 6:00PM, drop us an email for a meeting!
2011-09-08 00:00:00 | Technology
CDN design philosophies
I have gotten more and more questions about CDN architecture designs best practices and CDN architecture flexibility.
In the past two years, a number of vendors have moved into the CDN space. Their focus traditionally is in delivery appliances. They added request routing capabilities and now call it a CDN solution. But one CDN is not the other. Jet-Stream has been a leader in this market for almost 9 years now and we have encountered and identified quite a number of CDN design and architecture philosophy mistakes. For instance:
2011-09-01 00:00:00 | Technology
The wrong assumptions of DNS geo load balancing
Today, OpenDNS and Google announced “The Global Internet Speedup” which is an addition to DNS, enabling DNS based CDNs to better optimize their request routing.
One of the major flaws of using DNS for request routing is that using DNS, CDNs can only assume that the end user is in the same geo/topo location as their selected DNS service. Which is often a wrong assumption, especially when people use third party DNS services such as OpenDNS. The result is counter effective: instead of redirecting a user to a nearby server, users get sent to even more remote servers, which degrade the performance of the CDN instead of improving it.
The Global Internet Speedup is adding a trick to DNS that passes through a part of the end users IP address so the CDN can make a better educated guess about the end users (actually their ISP’s) location and can try to do a better match to a nearby delivery node. Multiple CDNs have committed to work with this initiative.
It is good that the industry finally sees that this DNS assumption is flawed and that they are trying to solve this problem. But is this the solution? No. There are some practical limitations. The proposal has not been ratified by IETF (yet). The other limitation is that there are thousands, ten thousands, hundred thousands DNS servers out there: ISPs, enterprises, offices, schools, they all run their own DNS server. Their operators have to change their DNS servers. I don’t see that happen overnight. Also because this implementation will increase the number of hits on their DNS servers and could result in a performance hit on their DNS services.
It is above all a workaround around the real problem and that is DNS itself. DNS was never intended to be used as a dynamic request routing mechanism. There are other wrong assumptions for DNS request routing. The below text is a sneak preview of our upcoming CDN Technologies White Paper and addresses this topic:
KPN introduces three screens
KPN announced a three screens service to their IPTV customer base.
The free service enables their IPTV subscribers to watch television on their PCs and iPads via their home WiFi.
The service is not made available via 3G or beyond the home’s WiFi due to mobile network capacity limitations and content licensing restrictions. The features for iPad and PCs are different. The iPad allows you to pause and on the PC you can rent VOD titles.