On 09/07/2010 06:03 PM, Dr. David Kirkby wrote:
> I decided to run "sage -upgrade" today - for about the first time ever.
> I'm going to try to upgrade sage-4.5.3.alpha2 to sage-4.5.3. I don't
> know if its a good idea to update alphas or not, but I'm not bothered if
> it fails or not.
>
>
> I get this:
>
> Testing mirrors...
>
> [2 ] boxen.math.washington.edu 895 [ms]
> [9 ] mirror.switch.ch 10900 [ms]
> [20] www.mirrorservice.org 10938 [ms]
> [7 ] ftp.sh.cvut.cz 10973 [ms]
> [11] mirrors.fe.up.pt 11027 [ms]
> [10] mirror.yandex.ru 11028 [ms]
> [18] sunsite.rediris.es 11038 [ms]
> [14] modular.math.jmu.edu 11062 [ms]
> [13] modular.fas.harvard.edu 11072 [ms]
> [12] mirrors.xmission.com 11152 [ms]
> [3 ] content.wuala.com 11226 [ms]
> [4 ] ftp.iitm.ac.in 11299 [ms]
> [8 ] mirror.aarnet.edu.au 11328 [ms]
> [15] sagemath.c3sl.ufpr.br 11357 [ms]
> [16] sagemath.mirror.ac.za 11516 [ms]
> [5 ] ftp.kaist.ac.kr 11597 [ms]
> [6 ] ftp.leg.uct.ac.za 11626 [ms]
> [19] www.cecm.sfu.ca 14831 [ms]
> [17] sagemath.polytechnic.edu.na 17131 [ms]
>
> Automatically selected server mirror.switch.ch
> (http://mirror.switch.ch/mirror/sagemath/)
> Downloading packages from http://mirror.switch.ch/mirror/sagemath//spkg
> Reading package lists... Done!
> The following packages will be upgraded:
>
> I assume these are ping time.
>
> If the ping time to boxen.math.washington.edu is an order of magnitude
> less than any other mirror, why is mirror.switch.ch chosen in preference
> to boxen.math.washington.edu?
>
> I suspect the reason boxen.math.washington.edu is quicker is that I have
> it's IP address in /etc/inet/hosts, so there is no DNS lookup involved.
> But I'm still puzzled why it was not chosen.
>From the docstring for SAGE_LOCAL/bin/sage-update's get_sage_mirror
function:
"""
Retrieves official list of active and up-to-date mirrors. This
only works in conjunction with a server script that generates the
SAGE_SERVER/mirror_list file every 10 minutes. Then selects one
of the top 3 mirrors, where pinging the host for index.html
responses fastest.
"""
and the code:
# select a random one from the top 3, to be fair
By the way, you can also set a custom upgrade path, e.g.,
./sage -upgrade
http://sage.math.washington.edu/home/release/sage-4.5.3/sage-4.5.3/
which might be necessary until 4.5.3 propagates out to the mirrors.
--
To post to this group, send an email to sage-devel@googlegroups.com
To unsubscribe from this group, send an email to
sage-devel+unsubscr...@googlegroups.com
For more options, visit this group at http://groups.google.com/group/sage-devel
URL: http://www.sagemath.org
