On Sun, Oct 7, 2012 at 5:46 AM, tor-admin <tor-ad...@torland.me> wrote: > Hi, > > I am operating two 1 GBit/s servers which host 7 exit nodes. One server is > located in GB with > > torland1 > https://atlas.torproject.org/#details/4E377F91D326552AAE818D5A17BC3EF79639C2CD > > torland2 > https://atlas.torproject.org/#details/332895D092C2524A3CDE8F6E1498FFE665EBFC34 > > torland1 is configured to run at maximum bandwidth, torland2 runs trottled to > ensure not to exceed the 100TB contractual traffic limit. The nodes on this > server get traffic as expected and are at the top of the Blutmagie Tor Status > http://torstatus.blutmagie.de/index.php?SR=Bandwidth&SO=Desc. > > The second server is located in RO and hosts > > torland3 > https://atlas.torproject.org/#details/E5DB403858511BB166405E4C43776D933A7B86D6 > > torland4 > https://atlas.torproject.org/#details/E0D2F8B2A18516A5C935477B06048D7BD2E7EC57 > > torland5 > https://atlas.torproject.org/#details/D2F1745C11843BC5AF09CB9D4027AD2BE5F1B20A > > torland6 > https://atlas.torproject.org/#details/43F9022028F8AB0F7420F702CB079DF0CA0C80E3 > > > The configuration for the GB and RO nodes is: > > Nickname TorLandX > ORPort 443 > DirPort 80 > Address a.b.c.d > ORListenAddress a.b.c.d > DirListenAddress a.b.c.d > OutboundBindAddress a.b.c.d > > RelayBandwidthRate 30 MBytes # max 30 > RelayBandwidthBurst 100 MBytes # max 100 > > MaxOnionsPending 250 > > NumCPUs 4 > > On both servers AES-NI is used by openssl. > > Although the server in RO has the same configuration, same operating system > and a similar hardware, it does not get traffic as the server in GB. At the > moment Atlas shows for torland3-6 only an advertised bandwidth rate of less > the 3 MB/s. The GB node torland1 shows more than 30 MB/s. > > In order to test if there are any traffic limits I did several speed tests by > doing up and downloads of a large 4GB iso image. > > Downloading simultaneously with 10 curl instances from different debian > mirrors I measured around 1 GBit/s. To measure upload I stored the debian 4GB > iso image on the webserver of the RO server and used curl on the GB server to > download it from RO. The maximal measured upstream speed on the RO server was > around 750 Mbit/s. Therefore I looks for me as there are no traffic limits > inplace by my ISP or their upstream. > > One of the servers operated by Torservers.net is located in the same data > center and runs wau, gorz and sofia at high speed. > > I am wondering why the directory authorities only measure such a small > fraction of the available bandwidth for the RO nodes. Because I am paying > personally for the server I would like to get most out of the server. Can > someone who runs a tor authority please help me to understand what is the > reason for the low observed bandwidth. > > Thanks, > > Torland > > _______________________________________________ > tor-relays mailing list > tor-relays@lists.torproject.org > https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-relays
I am not a directory authority. Have you taken a closer look at the configuration of the Tor exits wau or sofia? They are run by torservers.net -- see this page in particular. https://www.torservers.net/wiki/setup/server#high_bandwidth_tweaks_100_mbps I might guess that TCP window scaling and latency could be a factor. --Aaron _______________________________________________ tor-relays mailing list tor-relays@lists.torproject.org https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-relays