Re: [aqm] the side effects of 330ms lag in the real world
On Tue, Apr 29, 2014 at 12:56 AM, Mikael Abrahamsson wrote: > On Tue, 29 Apr 2014, Fred Baker (fred) wrote: A couple points here. 1) The video went viral, and garnered over 600,000 new hits in the 12 hours since I posted it here. there is pent up demand for less latency. While the ad conflates bandwidth with latency, they could have published their RTTs on their local fiber network, which is probably a great deal less than dsl or cable. That counts for a lot when accessing local services. 2) There is a lot of things an ISP can do to improve apparent latency on the long haul A) co-locating with a major dns server like f-root to reduce dns latency B) co-locating with major services like google and netflix publishing ping times to google for example might be a good tactic. C) Better peering >> Well, we could discuss international communications. I happen to be at >> Infocom in Toronto, VPN’d into Cisco San Jose, and did a ping to you: > > > Yes, but as soon as you hit the long distance network the latency is the > same regardless of access method. So while I agree that understanding the > effect of latency is important, it's no longer a meaningful way of selling > fiber access. If your last-mile is fiber instead of ADSL2+ won't improve > your long distance latency. Well, it chops a great deal from the baseline physical latency, and most people tend to access resources closer to them than farther away. An american in paris might want to access the NYT, but Parisians La Monde. Similarly most major websites are replicated and use CDNs to distribute their data closer to the user. The physical RTT matters more and more in the last mile the more resources are co-located in the local data center. -- Dave Täht ___ aqm mailing list aqm@ietf.org https://www.ietf.org/mailman/listinfo/aqm
Re: [aqm] the side effects of 330ms lag in the real world
On Tue, 29 Apr 2014, Fred Baker (fred) wrote: Well, we could discuss international communications. I happen to be at Infocom in Toronto, VPN’d into Cisco San Jose, and did a ping to you: Yes, but as soon as you hit the long distance network the latency is the same regardless of access method. So while I agree that understanding the effect of latency is important, it's no longer a meaningful way of selling fiber access. If your last-mile is fiber instead of ADSL2+ won't improve your long distance latency. -- Mikael Abrahamssonemail: swm...@swm.pp.se___ aqm mailing list aqm@ietf.org https://www.ietf.org/mailman/listinfo/aqm
Re: [aqm] the side effects of 330ms lag in the real world
On Apr 29, 2014, at 3:08 AM, Mikael Abrahamsson wrote: > On Mon, 28 Apr 2014, Dave Taht wrote: > >> pretty wonderful experiment and video http://livingwithlag.com/ > > Just so that everybody realises that this is an advertisement. > > Also, what access method has 300 ms access latency, let alone 3 seconds? None > that I know of, the meaningful comparison would be ADSL2+ at around 25ms and > 3G at around 50-100ms. Well, we could discuss international communications. I happen to be at Infocom in Toronto, VPN’d into Cisco San Jose, and did a ping to you: ping -c 10 swm.pp.se PING swm.pp.se (212.247.200.143): 56 data bytes ... --- swm.pp.se ping statistics --- 10 packets transmitted, 10 packets received, 0.0% packet loss round-trip min/avg/max/stddev = 249.368/342.038/456.376/71.902 ms 3 seconds is unusually high, although naval satcom is frequently in the 1.5-2.5 ms range. But I have a sample that I measured in a Dublin hotel that observed standing latencies of around 280 ms to San Jose, frequent latencies of seven seconds, and a peak of 9286 ms. Yes, the hotel DSL was horrendously misconfigured. It makes a great graphic for presentations. > -- > Mikael Abrahamssonemail: swm...@swm.pp.se > > ___ > aqm mailing list > aqm@ietf.org > https://www.ietf.org/mailman/listinfo/aqm The ignorance of how to use new knowledge stockpiles exponentially. - Marshall McLuhan signature.asc Description: Message signed with OpenPGP using GPGMail ___ aqm mailing list aqm@ietf.org https://www.ietf.org/mailman/listinfo/aqm
Re: [aqm] the side effects of 330ms lag in the real world
On Mon, 28 Apr 2014, Dave Taht wrote: pretty wonderful experiment and video http://livingwithlag.com/ Just so that everybody realises that this is an advertisement. Also, what access method has 300 ms access latency, let alone 3 seconds? None that I know of, the meaningful comparison would be ADSL2+ at around 25ms and 3G at around 50-100ms. -- Mikael Abrahamssonemail: swm...@swm.pp.se ___ aqm mailing list aqm@ietf.org https://www.ietf.org/mailman/listinfo/aqm
[aqm] the side effects of 330ms lag in the real world
pretty wonderful experiment and video http://livingwithlag.com/ -- Dave Täht ___ aqm mailing list aqm@ietf.org https://www.ietf.org/mailman/listinfo/aqm
