Re: Persistent connections and pipelining

["Cameron Dale" <camrdale@gmail.com>]

On 5/5/08, Cameron Dale <camrdale@gmail.com> wrote:
>  I was looking at the wireshark output for an apt-get download
>  recently, and I noticed that the mirror was closing the connection
>  after every file received. I did a test of the mirrors and found that
>  40 of about 360 mirrors behave like this, including several of the
>  primary country mirrors (most notably ftp.fr.d.o). These mirrors,
>  though they are HTTP/1.1, send a "Connection: close" header with every
>  request.

Not having gotten a response from any mirror admins who are
intentionally doing this, it occurred to me that they may not be aware
of it. Here are the 39 IP's and mirrors that close the connection
after every response:

128.118.2.96    carroll.aset.psu.edu
132.194.22.137  cudlug.cudenver.edu
200.69.240.253  debian.logiclinux.com
130.235.34.30   debian.lth.se
152.46.7.109    distro.ibiblio.org
212.36.0.70     ftp.bg.debian.org
147.52.159.12   ftp.cc.uoc.gr
150.140.141.179 ftp.ceid.upatras.gr
211.62.252.36   ftp.daum.net
202.216.228.228 ftp.dti.ad.jp
212.27.32.66    ftp.fr.debian.org
203.199.213.69  ftp.iitm.ac.in
141.2.1.7       ftp.informatik.uni-frankfurt.de
150.65.7.130    ftp.jaist.ac.jp
130.234.4.40    ftp.jyu.fi
134.58.250.2    ftp.kulnet.kuleuven.ac.be
62.4.17.18      ftp.nerim.net
192.87.102.42   ftp.nluug.nl
192.87.102.43   ftp.nluug.nl
213.83.42.56    ftp.plusline.de
130.206.1.5     ftp.rediris.es
192.87.102.42   ftp.surfnet.nl
192.87.102.43   ftp.surfnet.nl
61.19.246.118   ftp.thaios.net
195.241.77.98   ftp.tiscali.nl
128.192.1.76    ftp.uga.edu
131.130.1.72    ftp.univie.ac.at
194.167.156.234 ftp.univ-pau.fr
146.6.54.21     ftp.utexas.edu
193.206.139.34  mi.mirror.garr.it
213.186.33.37   mir1.ovh.net
213.186.33.38   mir2.ovh.net
192.115.211.70  mirror.isoc.org.il
77.87.192.91    mirror.mirohost.net
137.132.80.40   mirror.nus.edu.sg
81.92.200.26    mirrors.nfsi.pt
208.100.4.53    mirror.steadfast.net
133.11.205.121  sb.itc.u-tokyo.ac.jp
133.37.44.6     www.ring.gr.jp

Also, I noticed that these 2 mirrors send 200 responses to Range
requests, which can also be inefficient:

168.243.7.158   debian.ues.edu.sv
194.65.79.153   ftp.linux.pt

Thanks,
Cameron