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  1. #1
    Join Date
    Jul 2006
    Posts
    78

    Speeds from Europe to USA

    Are they supposed to be this poor? I did some speed tests from my box at Leaseweb to a LT box, and I can only upload via FTP at about 50KB and download from the LT box at 250-300KB.

    I can understand speeds of 300KB, but 50KB?! Why would it be so low to upload? Since I am about 105ms away and can pull down 600KB/s and the LT box is 125ms away, I don't see how latency could account for such a big difference.

  2. #2
    Join Date
    Apr 2005
    Location
    Jacksonville, FL
    Posts
    977
    When high latency is in play, packet loss can be devastating. It's apparent that packet loss is occurring somewhere along the path. Try increasing your TCP window size; that's about the only thing you have control over from your end.

    For reference, most of my transfers between the US and Europe are in the 600KB to 1300KB/sec range; the highest I've ever observed, including TCP tweaks, was 2200KB/sec.

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  3. #3
    Join Date
    Aug 2000
    Location
    Sheffield, South Yorks
    Posts
    3,480
    Increasing TCP window size will only serve to increase the problems of packet loss AFAIK. Off the top of my head, each 1% of packet loss roughly halves your transfer speed.
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  4. #4
    Join Date
    Jul 2006
    Posts
    78
    Could i do some investigating using traceroute? Anything specific to look for?

    EDIT: Ran a traceroute from my server. Goes quite well and quickly, but it paused for a few seconds on this hop. Maybe that's the problem?

    13 bhr1-pos-12-0.fortworthda1.savvis.net (208.172.131.82) 124.394 ms 124.439 ms *
    14 csr2-ve242.fortworthda1.savvis.net (216.39.64.59) 121.058 ms

  5. #5
    Join Date
    Sep 2006
    Posts
    18
    Hmm, Tracerouth won't be good , to EU to US. or the other way aroud.

  6. #6
    Join Date
    May 2004
    Posts
    350
    tical, can you post from which providers you got the higher end speeds from eu -> us and visa versa?

  7. #7
    Join Date
    Sep 2006
    Posts
    18
    I would say

    Leaseweb > Softlayer.

    or if lot's of peaple connected to it at the same time etc..

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