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I'm using Ubuntu Trusty 14.04 64 bits.

I've installed trickle network shaper from repositories and I performed some tests:

  • No limits

I executed this command to test somehow my network download limit:

wget -c ftp://ftp.cesca.cat/ubuntu/release/trusty/ubuntu-14.04.1-server-amd64.iso

I obtained an stable download speed of ~9 MB/s without cuts.

  • Limit to 200 KB/s

I used this command to limit my download speed to 200 KB/s:

trickle -d 200 wget -c ftp://ftp.cesca.cat/ubuntu/release/trusty/ubuntu-14.04.1-server-amd64.iso

I obtained a pretty good precise download speed of ~200 KB/s.

  • Limit to 1000 KB/s

I used same command to limit my download speed to 1000 KB/s:

trickle -d 1000 wget -c ftp://ftp.cesca.cat/ubuntu/release/trusty/ubuntu-14.04.1-server-amd64.iso

The network speed was ~200 KB/s, very stable, but I was expecting around 1000 KB/s.

  • Limit to 100 KB/s

I used same command to limit my download speed to 100 KB/s:

trickle -d 100 wget -c ftp://ftp.cesca.cat/ubuntu/release/trusty/ubuntu-14.04.1-server-amd64.iso

The network speed was ~100 KB/s, as expected.

I did some more tests, and it seems that limiting with speeds below 200 KB/s, the results were precise. But trying speeds above 200 KB/s, the program always got limited to 200 KB/s.

Why are these results produced? How can I limit precisely to higher speeds?

  • 1000 KB/s = 10 Mb/s. What is the maximum bandwidth available to you? – roaima Mar 19 '15 at 14:01
  • @roaima 1000 KB/s (one thousand) is 1MB/s, in the SI (en.wikipedia.org/wiki/Metric_prefix), the prefix M is 1000 (one thousand) times 1K. anyway I got 200KB/s in both cases. – logoff Mar 19 '15 at 14:31
  • I agree with you: 1000KB/s is 1MB/s. It is also 10Mb/s. What is your available bandwidth? – roaima Mar 19 '15 at 14:47
  • I used B, Bytes all the time in my post. moreover, 1 MB/s (mega bytes per second) is not 10 Mb/s (megabits per second), it is 8 Mb/s, because 1 Byte are 8 bits. this is not the issue of my post. – logoff Mar 19 '15 at 14:54
  • If you don't want to answer my question about your available bandwidth I can't offer any more suggestions. Better luck with someone else. – roaima Mar 19 '15 at 14:58

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