bot?
Tien Tuan Anh Dinh <[EMAIL PROTECTED]> wrote: Hi,
Does anyone know how a download manager searches for mirror sites of a
file ? Does the web-server provide something here ?
Cheers.
Arnaud Legout wrote:
> Hi,
>
> Matthew Kaufman wrote:
>> David Barrett wrote:
>>> Wow, very interesting. I can see the value of downloading in
>>> parallel from
>>> multiple mirrors...
>> I can't. Assuming they're all servers with public IP addresses and
>> reasonable outbound bandwidth, having each client load-balanced to a
>> single specific server and downloading over a single TCP stream is
>> more efficient for the network -- and provides better download
>> performance for the user -- than having multiple TCP streams fight
>> over the same congestion-limited download pipe.
>>
>> The only reason to download from multiple sources simultaneously is
>> the case where upstream capacity of serving nodes is a small fraction
>> of downstream capacity (see: P2P filesharing network where the files
>> are only present on ADSL or cable modem connected user machines), and
>> thus there'd be no way to fill the download pipe otherwise.
>
> For the ones interested in, there is this excellent article that
> evaluate parallel download strategies:
> P. Rodriguez, W. Ernst Biersack., "*Dynamic Parallel-Access to
> Replicated Content in the Internet*". /In IEEE/Transactions on
> Networking, August 2002 (Also in IEEE/Infocom 2000)
>
> http://research.microsoft.com/~pablo/paraload.aspx
>
> Arnaud.
> /
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