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Old 2022-03-18, 16:47   #1909
chris2be8
 
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Sep 2009

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I'm getting very variable download speeds, sometimes up to 2.4Mbytes/sec and sometimes as low as 15 kb/sec, but for the *same* job. (Scroll right to see transfer rates.)
Code:
--2022-03-18 04:04:14--  (try:13)  https://escatter11.fullerton.edu/nfs_data/f76_145p1/f76_145p1.dat.gz
Connecting to escatter11.fullerton.edu (escatter11.fullerton.edu)|137.151.45.191|:443... connected.
HTTP request sent, awaiting response... 206 Partial Content
Length: 9994125509 (9.3G), 9091547333 (8.5G) remaining [application/x-gzip]
Saving to: ‘f76_145p1.dat.gz’

f76_145p1.dat.gz                          9%[++++++>                                                                      ] 950.86M  33.7KB/s    in 1h 46m  

2022-03-18 06:05:44 (14.4 KB/s) - Read error at byte 997048320/9994125509 (Success). Retrying.

--2022-03-18 06:05:54--  (try:14)  https://escatter11.fullerton.edu/nfs_data/f76_145p1/f76_145p1.dat.gz
Connecting to escatter11.fullerton.edu (escatter11.fullerton.edu)|137.151.45.191|:443... connected.
HTTP request sent, awaiting response... 206 Partial Content
Length: 10012799632 (9.3G), 9015751312 (8.4G) remaining [application/x-gzip]
Saving to: ‘f76_145p1.dat.gz’

f76_145p1.dat.gz                         10%[+++++++                                                                      ] 962.91M  15.2KB/s    in 13m 22s 

2022-03-18 06:34:17 (15.4 KB/s) - Read error at byte 1009680384/10012799632 (Success). Retrying.

--2022-03-18 06:34:27--  (try:15)  https://escatter11.fullerton.edu/nfs_data/f76_145p1/f76_145p1.dat.gz
Connecting to escatter11.fullerton.edu (escatter11.fullerton.edu)|137.151.45.191|:443... connected.
HTTP request sent, awaiting response... 206 Partial Content
Length: 10015960688 (9.3G), 9006280304 (8.4G) remaining [application/x-gzip]
Saving to: ‘f76_145p1.dat.gz’

f76_145p1.dat.gz                         29%[+++++++==============>                                                       ]   2.73G  2.40MB/s    in 42m 55s 

2022-03-18 07:32:24 (728 KB/s) - Read error at byte 2929934336/10015960688 (Success). Retrying.

--2022-03-18 07:32:34--  (try:16)  https://escatter11.fullerton.edu/nfs_data/f76_145p1/f76_145p1.dat.gz
Connecting to escatter11.fullerton.edu (escatter11.fullerton.edu)|137.151.45.191|:443... connected.
HTTP request sent, awaiting response... 206 Partial Content
Length: 10238320802 (9.5G), 7308386466 (6.8G) remaining [application/x-gzip]
Saving to: ‘f76_145p1.dat.gz’

f76_145p1.dat.gz                         40%[++++++++++++++++++++++========>                                              ]   3.91G  48.3KB/s    in 6h 16m  

2022-03-18 13:48:55 (54.6 KB/s) - Connection closed at byte 4193484800. Retrying.

--2022-03-18 13:49:05--  (try:17)  https://escatter11.fullerton.edu/nfs_data/f76_145p1/f76_145p1.dat.gz
Connecting to escatter11.fullerton.edu (escatter11.fullerton.edu)|137.151.45.191|:443... connected.
HTTP request sent, awaiting response... 206 Partial Content
Length: 10388429211 (9.7G), 6194944411 (5.8G) remaining [application/x-gzip]
Saving to: ‘f76_145p1.dat.gz’

f76_145p1.dat.gz                        100%[+++++++++++++++++++++++++++++++=============================================>]   9.67G  2.22MB/s    in 48m 11s 

2022-03-18 14:37:18 (2.04 MB/s) - ‘f76_145p1.dat.gz’ saved [10388429211/10388429211]
Trying to gather more information:
Code:
$ sudo traceroute -T escatter11.fullerton.edu
traceroute to escatter11.fullerton.edu (137.151.45.191), 30 hops max, 60 byte packets
 1  * router (192.168.1.1)  0.685 ms  1.144 ms
 2  ae52-ner001.nec.as13285.net (78.144.1.9)  11.057 ms  12.556 ms  12.606 ms
 3  ae52-scr101.thw.as13285.net (78.144.1.8)  26.316 ms  21.333 ms  26.497 ms
 4  ae61-scr101.loh.as13285.net (78.144.1.113)  28.442 ms  21.357 ms  21.403 ms
 5  et-0-1-1.mcs1.lhr11.uk.zip.zayo.com (94.31.30.189)  22.332 ms  28.461 ms  22.365 ms
 6  * * *
 7  * ae5.cs1.lga5.us.eth.zayo.com (64.125.29.126)  148.209 ms  153.319 ms
 8  * * *
 9  * * *
10  * * *
11  * * *
12  ae21.cs2.lax112.us.eth.zayo.com (64.125.26.18)  161.998 ms * *
13  * * *
14  198.32.251.2 (198.32.251.2)  171.965 ms  192.291 ms  175.471 ms
15  dc-lax-agg8--lax-agg10-300g.cenic.net (137.164.11.71)  177.020 ms  177.063 ms  177.118 ms
16  dc-tus-agg8--lax-agg8-300g.cenic.net (137.164.11.83)  183.184 ms  178.878 ms  184.559 ms
17  ful-csu-2--tus-agg8-100g.cenic.net (137.164.3.47)  185.728 ms  175.982 ms  175.907 ms
18  csuf--ful-csu-2-lag1.cenic.net (137.164.40.50)  175.948 ms  176.002 ms  177.137 ms
19  * * *
20  * * *
21  escatter11.fullerton.edu (137.151.45.191)  182.062 ms  181.360 ms  182.725 ms
traceroute response times don't seem to vary between times when the download is fast and when it's slow. But I don't always get a response from hops 7 to 13.

Has anyone any idea what's going on?
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