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Very slow downloads from highland3.seas.upenn.edu server
Posted: Fri Apr 24, 2026 1:10 pm
by Schrödinger's cat
My last two work units from highland3.seas.upenn.edu (158.130.118.25) were both 92MiB, and took six minutes each to download. An 80MiB upload occurring simultaneously with the first download took 12 minutes! A non-simultaneous 80MiB upload took just two minutes and 15 seconds.
I believe the slow downloads and uploads are due to the server, as a 30MiB download from fah1.innovatr.ca took just 13 seconds, while a 31MiB upload to the same server took 50 seconds.
Re: Very slow downloads from highland3.seas.upenn.edu server
Posted: Fri Apr 24, 2026 1:15 pm
by muziqaz
Schrödinger's cat wrote: ↑Fri Apr 24, 2026 1:10 pm
My last two work units from highland3.seas.upenn.edu (158.130.118.25) were 92MiB, and took six minutes to download. A simultaneous 80MiB upload took 12 minutes!
I believe the slow downloads and uploads are due to the server, as a 30MiB download from fah1.innovatr.ca took just 13 seconds, while an upload to the same server to 50 seconds.
You are in Australia, you have to account for the traffic between you and East coast USA, which is nearly across the world
Re: Very slow downloads from highland3.seas.upenn.edu server
Posted: Fri Apr 24, 2026 1:24 pm
by Schrödinger's cat
muziqaz wrote: ↑Fri Apr 24, 2026 1:15 pm
You are in Australia, you have to account for the traffic between you and East coast USA, which is nearly across the world
That doesn't explain why one server is very slow compared to another. Also, data travels very quickly over fibre optic cable, even across oceans.
A Speed test to from Victoria, Australia to Portland, Oregon, U.S.A. gives a download of 27.33 megabits per second, with a ping time of 183 milliseconds and a download latency of 213 milliseconds (internet in Australia is expensive for singles!).
Re: Very slow downloads from highland3.seas.upenn.edu server
Posted: Fri Apr 24, 2026 1:27 pm
by muziqaz
Schrödinger's cat wrote: ↑Fri Apr 24, 2026 1:24 pm
muziqaz wrote: ↑Fri Apr 24, 2026 1:15 pm
You are in Australia, you have to account for the traffic between you and East coast USA, which is nearly across the world
That doesn't explain why one server is very slow compared to another.
A Speed test to from Victoria, Australia to Portland, U.S.A. gives a download of 27.33 megabits per second, with a ping time of 183 milliseconds and a download latency of 213 milliseconds (internet in Australia is expensive for singles!).
It does. You do not have direct line to upenn server
Even connection to the same server can vary every minute.
Re: Very slow downloads from highland3.seas.upenn.edu server
Posted: Fri Apr 24, 2026 2:11 pm
by Schrödinger's cat
Sixteen of the last eighteen 92MiB downloads since April 17, from highland3.seas.upenn.edu, took between 28 seconds and 54 seconds, with an average time of 36 seconds, except for the last two downloads.
So, the download time has increased by 6.6 to 13.3 times!
All downloads were 18260 work units.
Finally, a 92MiB download from Portland, Oregon, U.S.A., should take just 28.25 seconds on my internet connection (@ 27.33Mb/s).
Re: Very slow downloads from highland3.seas.upenn.edu server
Posted: Sat Apr 25, 2026 3:25 pm
by gordonbb
I'm now seeing slow downloads and uploads on highland1, 2 & 3 across 5 Slots in 3 systems. Sometimes taking an hour to download a WU.
Code: Select all
traceroute to highland1.seas.upenn.edu (158.130.118.23), 30 hops max, 60 byte packets
1 * * *
2 lo0-0-bng02-tor1.teksavvy.com (206.248.155.247) 13.678 ms 14.346 ms 14.335 ms
3 ae7-0-cr01-tor1.teksavvy.com (206.248.153.36) 16.241 ms 16.228 ms 16.499 ms
4 ae2-0-bdr01-tor1.teksavvy.com (206.248.153.9) 14.999 ms 14.987 ms ae1-0-bdr01-tor1.teksavvy.com (206.248.153.3) 14.958 ms
5 toro-b5-link.ip.twelve99.net (62.115.171.248) 15.807 ms 16.134 ms 16.121 ms
6 lumen-ic-361864.ip.twelve99-cust.net (213.248.94.123) 16.389 ms 12.854 ms 12.794 ms
7 * * *
8 UNIVERSITY.edge5.Newark1.Level3.net (4.16.91.150) 26.747 ms 28.839 ms 27.238 ms
9 hnt-brdr-dmz.hnt-fw.router.upenn.edu (128.91.48.6) 28.490 ms 28.473 ms 28.457 ms
10 hnt-fw.hnt-brdr.router.upenn.edu (128.91.48.14) 28.226 ms 28.202 ms 26.940 ms
11 hnt-brdr.vagelos.router.upenn.edu (128.91.244.34) 26.925 ms 26.857 ms 27.131 ms
12 core-router.seas.upenn.edu (158.130.0.249) 55.197 ms 55.862 ms 54.544 ms
Note the almost doubling of latency (RTT) on the last hop of a traceroute
Latency to all three systems seems within normal bounds:
Code: Select all
--- highland1.seas.upenn.edu ping statistics ---
13 packets transmitted, 13 received, 0% packet loss, time 12023ms
rtt min/avg/max/mdev = 27.582/30.135/38.385/3.518 ms
--- highland2.seas.upenn.edu ping statistics ---
10 packets transmitted, 10 received, 0% packet loss, time 9016ms
rtt min/avg/max/mdev = 27.489/28.355/31.920/1.252 ms
--- highland3.seas.upenn.edu ping statistics ---
26 packets transmitted, 11 received, 57.6923% packet loss, time 25360ms
rtt min/avg/max/mdev = 27.521/30.420/37.710/3.514 ms
Re: Very slow downloads from highland3.seas.upenn.edu server
Posted: Sun Apr 26, 2026 2:32 pm
by toTOW
Highland servers have always had random download/upload issues when you're not in the US and no one never figured out why ...
Hihgland3 has been updated to the latest version of the WS software, it might trigger new issues.