[Python-Dev] Problem with svn on community buildbot
Alexander Belopolsky
alexander.belopolsky at gmail.com
Sun Dec 14 17:07:30 CET 2008
I don't know is this is related, but from my end, access to
svn.python.org has been extremely slow recently:
$ time curl -o /dev/null http://svn.python.org
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 353 100 353 0 0 4 0 0:01:28 0:01:15 0:00:13 0
real 1m15.045s
user 0m0.004s
sys 0m0.004s
I've seen similar slowdowns accessing bugs.python.org, but not now.
It looks like it has something to do with IPv6:
$ host svn.python.org
svn.python.org has address 82.94.164.164
svn.python.org has IPv6 address 2001:888:2000:d::a4
$ time curl -v -o /dev/null http://svn.python.org
* About to connect() to svn.python.org port 80 (#0)
* Trying 2001:888:2000:d::a4... Operation timed out
* Trying 82.94.164.164... connected
...
No slowdown when IPv6 lookup is disabled with -4 option to curl:
$ time curl -4 -o /dev/null http://svn.python.org
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 353 100 353 0 0 774 0 --:--:-- --:--:-- --:--:-- 0
real 0m0.463s
user 0m0.004s
sys 0m0.004s
On Sun, Dec 14, 2008 at 8:58 AM, <skip at pobox.com> wrote:
>
> Martin> Well - can you resolve `svn.python.org' on that machine
> Martin> (e.g. when using ping(1))?
>
> Yup:
>
> $ host svn.python.org
> svn.python.org has address 82.94.164.164
> svn.python.org has IPv6 address 2001:888:2000:d::a4
> $ ping svn.python.org
> PING svn.python.org (82.94.164.164): 56 data bytes
> 64 bytes from 82.94.164.164: icmp_seq=0 ttl=50 time=134.041 ms
> 64 bytes from 82.94.164.164: icmp_seq=1 ttl=50 time=135.441 ms
> 64 bytes from 82.94.164.164: icmp_seq=2 ttl=50 time=135.352 ms
> ^C
> --- svn.python.org ping statistics ---
> 3 packets transmitted, 3 packets received, 0% packet loss
> round-trip min/avg/max/stddev = 134.041/134.945/135.441/0.640 ms
> $ telnet svn.python.org 80
> Trying 82.94.164.164...
> Connected to svn.python.org.
> Escape character is '^]'.
> ^]
> telnet> quit
> Connection closed.
>
> Skip
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