kernel optimization for long distance download??

[Ohad Levy]

You would need to know what to sniff, e.g. if tcp dynamic window scaling is
enabled.

I'll be interested in what you consider dirty tricks?
AFAIK increasing the tcp window size (read: send more data for every ack) is
not considered dirty trick at all, and is very efficient with good
connections (low packet drop) and high latency.

Ohad
2010/3/6 Shachar Shemesh <shachar at shemesh.biz>

>  Hetz Ben Hamo wrote:
>
>  Hi people,
>
>  I'm having an argument with a hosting company abroad. Their mirror server
> gives me full speed download (600k on my 5Mbit ADSL) while my server there
> gives me half.
> They say that they don't use any QoS tricks.
>
>  I have talked to their support and I heard a weird claim: their mirror
> server's kernel is "optimized for long distance download".
> I never heard of such a thing in my life with the Linux kernel of such a
> thing..
>
> Short answer - run a sniffer on both downloads.
>
> Longer answer - there are some tricks you can do, some of them "legal",
> others violating the TCP/IP standard, in order to handle high latency links
> better. They might be referring to those.
>
> Conclusion - run a sniffer :-)
>
> Shachar
>
> --
> Shachar Shemesh
> Lingnu Open Source Consulting Ltd.http://www.lingnu.com
>
>
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