Skype™ Technologies http://www.skype.com/
Skype™ Technologies http://www.skype.com/ Links to an external site.
|
Downloads |
Simultaneous users |
Date |
|---|---|---|
|
856,651,280 |
46,556,941 |
2014.05.08 at 12:15 CEST |
|
562,405,650 |
52,400,993 |
2013.09.01 at 13:39 CEST |
|
3,045,390,529 |
38,284,981 |
2012.08.23 at 18:50 CEST |
|
2,188,315,138 |
26,475,036 |
2011.08.16 at 17:00 MEST |
|
2,438,790,535 |
18,386,099 |
2010.08.20 at 20:00 MEST |
|
1,587,992,602 |
15,627,990 |
2009.08.19 at 17:20 MEST |
|
844,062,744 |
11,306,336 |
2008.03.24 |
|
522,932,765 |
5,512,395 |
2007.03.27 |
|
~9 million |
2007.01.29 |
|
|
~200,000,000 |
2005.11.08 |
|
|
> 5 million |
2006.01.23 [Jaanus 2006] |
“Skype is free Internet telephony that just works.”
In 2005: ~1 Million downloads/day, downloads at peak are ~0.5 Gbit/sec
L. De Cicco, S. Mascolo, and V. Palmisano have written a paper ‘A mathematical model of the Skype VoIP congestion control algorithm’ [De Cicco 2008] where they looking at how Skype changes it sending rate based upon packet loss rate.
Slide Notes
Jaanus, “5 million online Skypers”, in News, Events, Milestones, Skype, January 23, 2006 http://share.skype.com/sites/en/2006/01/5_million_online_skypers.htm Links to an external site.l Links to an external site., last modified March 12, 2006 14:05:25
L. De Cicco, S. Mascolo, and V. Palmisano, ‘A mathematical model of the Skype VoIP congestion control algorithm’, presented at the 47th IEEE Conference on Decision and Control, 2008. CDC, Cancun, 2008, pp. 1410–1415 [Online]. Available: http://ieeexplore.ieee.org/lpdocs/epic03/wrapper.htm?arnumber=4739324 Links to an external site.
Transcript
[slide539] Skype, with enormous numbers of users, very fast growth rate, one of their biggest problems was by 2005, they were already having a million downloads a day. It was taking half a gigabit per second, just people downloading their client. If you were a normal service provider, you would say, oh no, this is impossible. We can't scale up the service that fast. But the trick was, each of those customers who was downloading it was providing, yes, more service platform. Because they let each of the peers do part of the processing. And the media went just directly from endpoint to endpoint. So the lookups of where is the user were done in a distributed fashion. There's a very nice paper on a mathematical model of Skype's VoIP congestion control algorithm, which you can take a look at if you want.