Re: apt PARALLELISM
Martijn van Oosterhout <kleptog@gmail.com> writes:
> 2005/12/12, Henrique de Moraes Holschuh <hmh@debian.org>:
>
> We don't want them to open multiple connections even to
> MULTIPLE servers...
>
>
> That's odd though, because apt *does* open connections to multiple servers all
> the time. To fetch packages lists, or if a package is only available on one of
> the servers further down.
>
>
> Secondly, the amount of data to be downloaded is independant of the time it
> takes, thus, in aggregate, whether apt parallelizes or not won't make any
> difference to the total bandwidth used, although it may shift more load to the
> ftp2 servers since they never get used in normal usage.
> Finally, how much of these slowdowns reported by people are caused by the
> bandwidth delay product. In that case, two servers will definitly be able to
> use more than a single server by itself... I didn't think it common practice
> for large mirror to configure multi-megabyte windows...
> Have a nice day,
Actualy one thing apt could do:
mrvn@frosties:~% host security.debian.org
security.debian.org A 82.94.249.158
security.debian.org A 128.101.80.133
security.debian.org A 194.109.137.218
Why not open 3 connections one to each host?
Or at least fall back to the other IPs if the first one gives an
error?
MfG
Goswin
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