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Dave Taht
Works at Bufferbloat.net
Attended University of USENET
Lived in Santa Cruz, Ca
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Dave Taht

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I am wondering if anyone else I know in europe will be in the same places at the same times?

Right now it is looking like:

Sweden jul 10-15, prague  jul17-23, paris jul 25- aug 3, slovenia, aug 3-9 (maybe germany after that, for a campout), and after that, unsure. Switzerland?  Any chance you will be in any of these places at the same time?

I'm packing a guitar.
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Beat Bolli's profile photoStefan Holmer's profile photoDave Taht's profile photoMikael Abrahamsson's profile photo
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Ok, let me know when you know more and let's see if we can meet up!
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Dave Taht

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This shows babel choosing a more optimal path in the face of redundant routes, over wifi.

http://snapon.lab.bufferbloat.net/~d/showing_shortest_path_not_optimal.png
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Dave Taht

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My fq_codel'd 2 hops of #wifi mesh network, taken about 100 feet from the pole, on an macbook by the pool:

http://www.dslreports.com/speedtest/776253

It is good enough for skype. Just say'in. Doing an upgrade tomorrow.

dair-871:~ d$ traceroute -n 8.8.8.8
traceroute to 8.8.8.8 (8.8.8.8), 64 hops max, 52 byte packets
 1  172.20.4.1  2.320 ms  1.129 ms  1.230 ms # 2ghz AP
 2  172.20.142.3  1.545 ms  1.413 ms  1.332 ms # 5ghz p2p link elsewhere
 3  172.20.142.4  1.680 ms  1.350 ms  1.493 ms # ethernet to next hop Ptp
 4  172.23.142.9  2.701 ms  2.724 ms  3.892 ms # wifi p2p
 5  172.20.2.1  8.487 ms  7.378 ms  3.191 ms # source specific gateway

First hop bandwidth:

dair-871:~ d$ netperf -H 172.20.4.1
MIGRATED TCP STREAM TEST from (null) (0.0.0.0) port 0 AF_INET to (null) () port 0 AF_INET : demo
Recv   Send    Send                          
Socket Socket  Message  Elapsed              
Size   Size    Size     Time     Throughput  
bytes  bytes   bytes    secs.    10^6bits/sec  

 87380 131072 131072    10.06      21.82  

to the oldest AP I have in the place. 3+ years old - so old it does not even have the final version of fq_codel on it.

root@pool-pole2-omni:~# uname -a
Linux pool-pole2-omni 3.3.8 #1 Wed Sep 19 09:48:30 PDT 2012 mips GNU/Linux

But it is doing it's job:

qdisc nfq_codel 30: parent 1:3 limit 1000p flows 1024 quantum 1000 target 5.0ms interval 100.0ms ecn 
 Sent 2529235677 bytes 1723892 pkt (dropped 9398, overlimits 0 requeues 119645) 
 backlog 0b 0p requeues 119645 
  maxpacket 0 drop_overlimit 0 new_flow_count 60406 ecn_mark 70
  new_flows_len 0 old_flows_len 0
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So in this case fq_codel (and soon, cake) is on all the backhaul links.

It is on on the APs too. I am not aiming for speed records, I am aiming for usable skype. Which I am winning at.
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Dave Taht

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Sometimes I forget that the whole point of running the wifi mesh network here is that it hauls wifi to the pool. It was like 100 degrees today... and I spent it fixing a couple new hops... hmm... maybe I should install a big monitor up here. And haul up a better keyboard... hey, a waterproof keyboard.... VR goggles so you could float in the water like you were in zero g.... yea...

:splash:
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Dave Taht

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New EdgeMAX software release v1.7.0 for EdgeRouter products has been released! It is available here: ERLite-3 and ERPoe-5 (3-port and 5-por...
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I continue to wish the upload and download rates did not need to be manually set. That needs to be automatic.
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"... software engineering/firmware takes a different talent set and mental framework. i.e hardware engineers seem to see 'networks' of simultaneous elements while the software engineer needs to develop in a more linear, single point of execution frame of mind. The leads to the hardware engineer developing 'spaghetti code' in a lot of cases, while a good software engineer can design organized and testable modular code.." - https://www.linkedin.com/grp/post/4023060-5995666751101157376
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Mr. Scaccia started that thread more than two months ago, and the hits just keep on comin. There is some repeat of themes like: you need both electrical and software skillz for good embedded results. I guess the obvious isn't always obvious.
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Dave Taht

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Ah. I remember the days of truckin in without a plan. I remember "need a miracle" signs - - anyone got a parking pass?
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Dave Taht

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This shows a very pretty picture of multiple feasible routes installed on my network. The babel RTT information is new, it is part of the protocol now. I hope to one day leverage it to produce smarter routing metrics.

http://snapon.lab.bufferbloat.net/~d/prettyweb.png

I wish I knew how to make #babelweb show the plots full screen. It is mesmerizing to watch what happens when I take a box down.
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Dave Taht

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And this was with ecn enabled, 5 hops of mixed meshed wifi:

 http://www.dslreports.com/speedtest/776347

Beating #bufferbloat for the ultimate pooltime experience.

:splash:
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I highly approve of more deep impact style asteroid missions. However i think we should do it a lot, at everything we can aim at, on a regular basis. 
 
Telescopes focus on target of ESA's asteroid mission

Telescopes around the globe recently homed in on one point in the sky, observing the paired Didymos asteroids – the target for ESA’s proposed Asteroid Impact Mission (AIM). The goal was to help with planning not only ESA’s Asteroid Impact Mission (AIM) but also the NASA-led Double Asteroid Redirection Test, or DART, which will crash into Didymoon in late 2022 as ESA’s craft looks on.

Full story here:
http://www.esa.int/Our_Activities/Space_Engineering_Technology/Asteroid_Impact_Mission/Telescopes_focus_on_target_of_ESA_s_asteroid_mission

65803 Didymos Asteroid (1996 GT)

The 800 meter diameter main asteroid Didymos is orbited by a 170 meter diameter moon at about 1.1 kilometer distance, this moon is informally dubbed Didymoon. More information here:
https://en.wikipedia.org/wiki/65803_Didymos

More on the Asteroid Impact & Deflection Assessment (AIDA) mission combining ESA's Asteroid Impact Mission (AIM) and NASA's Double Asteroid Redirection Test (DART):
https://en.wikipedia.org/wiki/AIDA_(mission)

Image credit: AIM uses infrared to monitor moment of impact ESA - ScienceOffice.org http://bit.ly/1ILmlV6

#science   #didymos   #asteroid   #aim   #aida   #dart   #didymoon   #nasa   #esa   #space   #spaceexploration  
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I only met him once. But we had exchanged a huge flurry of emails back in the early bufferbloat days, And I learned much about networking as a result. :sigh:
 
I am very sorry to report that Greg Chesson, of Ahteros, SGI, Bell Labs, and most recently Google, has died after an illness. Last year he received the Univ. of Illinois Alumni Award for Distinguished Service from the College of Engineering (https://cs.illinois.edu/news/chesson-receives-alumni-award-distinguished-service). His role in the early days of UNIX development was too extensive to even begin listing here. I fondly remember hanging out with Greg at Bell Labs Murray Hill when I'd come east to visit. Back in the day, he had a featured role in a Bell Labs recruiting video, linked to this post. He will be greatly missed. Condolences and best wishes to his loved ones. Peace.
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Dave Taht

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Just towards the close of the first set at last nights grateful dead show, a rainbow came out.  Honestly, I thought it was a special effect! It wasnt until the band exited the stage to go take back control of the weather machines to stop the further onset of rain that I realized it was something deeper.

http://snapon.lab.bufferbloat.net/~d/rainbow_dead.jpg
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Work
Occupation
Cheerleader. Gimme an I! Gimmie a n! Gimmie a T! Gimmie a E! Gimmie an R! Gimmie a N! Gimmie a E! Gimmie a T! What's that spell?
Employment
  • Bufferbloat.net
    Fugi Chef, 2011 - present
  • Teklibre.com
    CEO, 2007 - 2010
  • MontaVista
    Member, Visionary Staff, 2000 - 2003
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Map of the places this user has livedMap of the places this user has livedMap of the places this user has lived
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Santa Cruz, Ca - San Juan Del Sur, Nicaragua - Denver, CO - Ft Lauderdale, FL - Ft Myers, FL - Ocean City, NJ - Paris, France
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singer, pianist, guitarist, writer, experimenter, theorist, hacker, maker, faker - in no particular order, on any given day. And I also write code.
Introduction
I used to be just a geek. Then I sold my house, left my cubicle, and travelled around the world, trying never to touch a computer, but observe how they were used, and how much better we could use them... now I'm still travelling, and still without a home - but trying once again to help hold up the sky, and finish what I helped start, so long ago.
Bragging rights
can surf big waves and fix big problems, and when I can't do either, can 'tom sawyer' others into thinking that they can do the same, and exceed their own limits.
Education
  • University of USENET
    Study of Everything, 1983 - 1993
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"md"