| 2 | | |
| 3 | | == Writing the Experiment Script == |
| 4 | | |
| 5 | | While the disk image is loading onto his nodes, he prepares an experiment script. This script describes the configuration of all the OMF-enabled resources in the experiment, and the sequence of events in the experiment. |
| 6 | | |
| 7 | | The experiment script is given here: |
| 8 | | |
| 9 | | {{{ |
| 10 | | #!ruby |
| 11 | | defProperty('hrnSuffix', ".outdoor.orbit-lab.org", "Suffix to use for the HRN of resources") |
| 12 | | defProperty('hrnPrefix', "node1-", "Prefix to use for the HRN of resources") |
| 13 | | defProperty('serverNum', "5", "Server's node number:x-y") |
| 14 | | defProperty('rxNum', "3", "Receiver's node number:x-y") |
| 15 | | defProperty('duration', 100, "Duration of experiment") |
| 16 | | defProperty('serverURL', "http://10.41.41.#{property.serverNum}/", "server's url") |
| 17 | | defProperty('inputPath', "dash_lo/www-itec.uni-klu.ac.at/ftp/datasets/mmsys12/BigBuckBunny/bunny_2s_480p_only/bunny_Desktop.mpd", "Path of the Media Presentation Description File") |
| 18 | | |
| 19 | | defGroup("Server", "#{property.hrnPrefix}#{property.serverNum}#{property.hrnSuffix}") do |node| |
| 20 | | node.net.e0.ip = '10.41.41.%y%' |
| 21 | | node.net.e0.netmask = "255.255.0.0" |
| 22 | | end |
| 23 | | |
| 24 | | defGroup("Receiver", "#{property.hrnPrefix}#{property.rxNum}#{property.hrnSuffix}") do |node| |
| 25 | | node.net.x0.profile = '51' |
| 26 | | node.net.x0.ip = '10.41.41.%y%' |
| 27 | | node.net.x0.netmask = "255.255.0.0" |
| 28 | | node.addApplication('vlc-dash', :id => 'vlc') do |app| |
| 29 | | app.setProperty('quiet', true) |
| 30 | | app.setProperty('play-and-exit', true) |
| 31 | | app.setProperty('intf', 'dummy') |
| 32 | | app.setProperty('redirect', true) |
| 33 | | app.setProperty('input', "http://10.41.41.#{property.serverNum}/#{property.inputPath}") |
| 34 | | app.setProperty('sout', "''#duplicate{dst=display,dst=std{access=file,mux=ts,dst=/root/#{Experiment.ID}.mp4}}''") |
| 35 | | app.measure('dashRateAdaptation', :samples =>1) |
| 36 | | app.measure('dashDlSession', :samples =>1) |
| 37 | | end |
| 38 | | node.addApplication('wmxstat_universal', :id => 'wmxstat') do |app| |
| 39 | | app.measure('status') |
| 40 | | end |
| 41 | | end |
| 42 | | |
| 43 | | |
| 44 | | |
| 45 | | onEvent(:ALL_UP_AND_INSTALLED) do |event| |
| 46 | | system("/usr/local/bin/getbsconf -i wimaxrf --oml-collect tcp:oml:3004 --oml-id console --oml-domain #{Experiment.ID}") |
| 47 | | wait 5 |
| 48 | | group("Server").exec("/etc/init.d/apache2 start") |
| 49 | | wait 10 |
| 50 | | group("Receiver").startApplication('wmxstat') |
| 51 | | group("Receiver").startApplication('vlc') |
| 52 | | wait property.duration |
| 53 | | group("Receiver").stopApplications |
| 54 | | system("/usr/bin/ssh root@#{property.hrnPrefix}#{property.rxNum} '/usr/local/bin/iput /root/#{Experiment.ID}.mp4 dash'") |
| 55 | | wait 10 |
| 56 | | group("Server").exec("/etc/init.d/apache2 stop") |
| 57 | | wait 10 |
| 58 | | Experiment.done |
| 59 | | end |
| 60 | | |
| 61 | | |
| 62 | | |
| 63 | | }}} |
| 64 | | |
| 65 | | [[br]] |
| 66 | | > '''Deconstructing the experiment script''': [[br]] |
| 67 | | > Every OMF-enabled node in the experiment (purple node) is represented by a "defGroup" stanza. [[br]] |
| 68 | | > Every OML-enabled application that runs on an OMF node is represented by an "addApplication" stanza within the "defGroup" |
