Script for the benchmark of the murder/lp solution. (cf https://docs.google.com/spreadsheet/ccc?key=0Aq7sV8dJ-ve1dFhwYTIzRXJRWnRmTEkwNVdkejM2dEE#gid=0 )

Capfile

require 'rubygems'
require 'murder'

set :remote_murder_path, '/etc/bundler.chef/vendor/bundle/ruby/1.9.1/gems/murder-0.1.2/dist/' # or some other directory


s = []

pee = s[0..(ENV['COUNT'].to_i || -1)]

role :peer, *pee

role :seeder, master_fqdn
role :tracker, master_fqdn

namespace :murder do
  desc <<-DESC
  Will cause the seeder machine to connect to the tracker and start seeding. The ip address returned by the 'host' bash command will be ann
ounced to the tracker. The server will not stop seeding until the stop_seeding task is called. You must specify a valid 'tag' argument (whi
ch identifies the .torrent in /tmp to use)
  DESC
  task :start_seeding, :roles => :seeder do
    require_tag
    run "screen -dms 'seeder-#{tag}' python #{remote_murder_path}/murder_client.py seeder '#{filename}.torrent' '#{filename}' `LC_ALL=C hos
t $(hostname -f) | awk '/has address/ {print $4}' | head -n 1`"
  end
end

murder.sh

cap -l /dev/null murder:stop_all_seeding 2> /dev/null
knife ssh -x root "hostname:*" "rm -rf /mnt/tmp/Deploy*; rm -rf /tmp/Deploy*" > /dev/null
path_is_file=1 do_not_download_torrent=1 cap -l /dev/null murder:create_torrent tag="Deploy5" files_path="/mnt/tmp/artifact-5db0cd2f471dfcf280
ec718f0f117fab3b1cb86a-staging.tar"
cap -l /dev/null murder:start_seeding tag="Deploy5"
time cap -l /dev/null murder:peer tag="Deploy5" destination_path="/mnt/tmp/"