BitTorrent (B. Cohen's version)

The modified bittorrent tarball is currently under the MPIBlib repository:

svn co https://hcl.ucd.ie/repos/CPM/trunk/MPIBlib/tests/bittorrent/bittorrent.tar.gz

• Extract this under your home directory
  • You might need

 mv $HOME/lib/python $HOME/lib/python2.6

• export following variables to tweak the way Python paths are searched:

 export PYTHONHOME=$HOME
 export PYTHONPATH=/usr/lib/python2.6/

• Create a file of any size consisting of "s" characters only.
• Create torrent file:

 btmakemetafile myfile.ext http://<frontend on G5K>:6969/announce

• Stick the torrent file into $HOME/public at the frontend.
  • It is then available from within G5K under http://public.lille.grid5000.fr/~kdichev/{torrent file}
• Start the tracker on the frontend:

 bttrack --port 6969 --dfile dstate

• Book nodes interactively:

 qsub -I -lnodes=...

• Start one client that has the full copy

 ssh <one-node> btdownloadheadless --url http://public.lille.grid5000.fr/~kdichev/{torrent file} &

• On all other nodes, launch the client at the same time:

script-per-process.sh

 #!/bin/bash
 cd /tmp ;  btdownloadheadless --display_interval 100 --url http://public.lille.grid5000.fr/~kdichev/{torrent file}

run.sh

 mpirun -n 14 --machinefile hostfile  $PWD/script-per-process.sh