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Re: netselect - choosing the best FTP server automatically



On Thu, 25 Jun 1998, Avery Pennarun wrote:

> A while ago on debian-devel I proposed an algorithm that would allow APT to
> choose the best possible server for each user from a large list
> automatically.  It could also be used for other tasks, eg. choosing a good
> SQUID neighbour or IRC server.

This is pretty good, but it seems to loose much meaning for me with
several equal servers,

ftp1.us.debian.org                     111 ms   16 hops   91% ok (31/34)
llug.sep.bnl.gov                        83 ms   15 hops  100% ok (110/110)
ftp.debian.org                          80 ms   19 hops   93% ok (40/43)
ftp.cdrom.com                           87 ms   13 hops   92% ok (39/42)
--
ftp1.us.debian.org                     115 ms   16 hops   93% ok (31/33)
llug.sep.bnl.gov                        79 ms   15 hops   85% ok (18/21)
ftp.debian.org                         100 ms   19 hops   90% ok (28/31)
ftp.cdrom.com                          105 ms   13 hops   90% ok (27/30)

I'm sitting on a high speed lan conection (ie I get ~100k/s from llug)
Presumably this program pushes the network a bit hard and that is why
there is packet loss a straight ping to any of these sites will get 0%
loss.

My question is how can we build a single weighted score for each site? Let
the user pick one of the top two or so. But how do you weight?

Someone should definately work on this - I can make use if in APT in a big
way.

Jason


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