= Module E Flow Statistics Experiment in !LabWiki (on extended topology) = == 3. Instrument your Application using !LabWiki == In this part we will run the OEDL script that we wrote in the previous step. The OEDL script called GEC20_flowstatistics.oedl === 3.1.1. The "Plan" Window === Now you can use the original MD script and modify it with new information on the flow statistics and the experiment that measures the flow statistics using the Trema controller API Look [wiki:GEC20Agenda/LabWiki/ModuleA/Execute here] if you have to refresh your memory on how to use the prepare window. === 3.1.2 The "Prepare" Window === This experiment will do the following: [[BR]] a. Start Trema controllers on the two switch nodes in the topology shown in [http://groups.geni.net/geni/wiki/GEC20Agenda/LabWiki/ModuleC/DesignSetup ModuleC] {{{ defApplication('trema') do |app| app.description = 'This app runs trema from command line' app.binary_path = '/usr/bin/trema run /root/learning-switch.rb' end defGroup('Source2', property.source1,property.source2) do |node| node.addApplication("trema") end }}} b. Start an Iperf server on nodef {{{ defApplication('iperfserv') do |app| app.description = "manually run Iperf server" app.binary_path = "/usr/bin/iperf -s" end defGroup('Receiver', property.theReceiver) do |node| node.addApplication("iperfserv") do |app| end end }}} c. Start Iperf clients on nodea -nodee {{{ defApplication('iperfclient') do |app| app.description = "manually run Iperf client" app.binary_path = "/usr/bin/iperf -c 192.168.1.15 -t 100 -P 2 -i 2" end defGroup('Sender2', property.theSender2) do |node| node.addApplication("iperfclient") do |app| end end }}} d. Start Flow Statistics Measurement Application written in Step 1 e. For reference, we show the Flow Statistics script here: OEDL script {{{ defProperty('source1', "switch1-rspecforMax", "ID of a resource") defProperty('source2', "switch2-rspecforMax", "ID of a resource") defProperty('source3', "switch1-rspecforMax", "ID of a resource") defProperty('theSender1', "nodeb-rspecforMax", "ID of a resource") defProperty('theSender2', "nodec-rspecforMax", "ID of a resource") defProperty('theSender3', "noded-rspecforMax", "ID of a resource") defProperty('theSender4', "nodec-rspecforMax", "ID of a resource") defProperty('theSender5', "nodee-rspecforMax", "ID of a resource") defProperty('theReceiver', "nodef-rspecforMax", "ID of a resource") defProperty('intervalcol',"1", "Interval to Tail") defProperty('pathfile', "/tmp/flowstats.out", "Path to file") defApplication('ofstats') do |app| app.description = 'Simple Definition for the of-collect application' # Define the path to the binary executable for this application app.binary_path = '/usr/local/bin/learn_ofcollect.rb' app.defProperty('target', 'Address to output file', '-f', {:type => :string}) app.defProperty("interval","Interval",'-i', {:type => :string}) app.defMeasurement('wrapper_ofthroughput') do |m| m.defMetric(':srcaddr', :string) m.defMetric('throughput',:int64) end end defApplication('trema') do |app| app.description = 'This app runs trema from command line' app.binary_path = '/usr/bin/trema run /root/learning-switch.rb' end defApplication('iperfserv') do |app| app.description = "manually run Iperf server" app.binary_path = "/usr/bin/iperf -s" end defApplication('iperfclient') do |app| app.description = "manually run Iperf client" app.binary_path = "/usr/bin/iperf -c 192.168.1.15 -t 800 -P 2 -i 2" end defApplication('clean_iperf') do |app| app.description = 'Some commands to ensure that we start with a clean slate' app.binary_path = 'killall -s9 iperf' app.quiet = true end defGroup('Source2', property.source1,property.source2) do |node| node.addApplication("trema") end defGroup('Source3', property.source1) do |node| node.addApplication("ofstats") do |app| app.setProperty('target', property.pathfile) app.setProperty('interval', property.intervalcol) app.measure('wrapper_ofthroughput', :samples => 1) end end defGroup('Sender1', property.theSender1) do |node| node.addApplication("iperfclient") do |app| end end defGroup('Sender2', property.theSender2) do |node| node.addApplication("iperfclient") do |app| end end defGroup('Sender3', property.theSender3) do |node| node.addApplication("iperfclient") do |app| end end defGroup('Sender4', property.theSender4) do |node| node.addApplication("iperfclient") do |app| end end defGroup('Sender5', property.theSender5) do |node| node.addApplication("iperfclient") do |app| end end defGroup('Receiver', property.theReceiver) do |node| node.addApplication("iperfserv") do |app| end end onEvent(:ALL_UP_AND_INSTALLED) do |event| info "Starting the collect" info "Starting the collect" after 2 do group('Source2').startApplications group('Receiver').startApplications end after 10 do group('Sender1').startApplications end after 20 do group('Sender2').startApplications group('Source3').startApplications end after 40 do group('Sender3').startApplications end after 60 do group('Sender4').startApplications end after 80 do group('Sender5').startApplications end after 120 do info "Stopping the collect" allGroups.stopApplications Experiment.done end end defGraph 'Throughput' do |g| g.ms('wrapper_ofthroughput').select(:oml_ts_client, :throughput, :srcaddr) g.caption "Throughput of Flows" g.type 'line_chart3' g.mapping :x_axis => :oml_ts_client, :y_axis => :throughput, :group_by => :srcaddr g.xaxis :legend => 'oml_ts' g.yaxis :legend => 'Throughput', :ticks => {:format => 's'} end }}} === 3.1.3 Start your application from !LabWiki === To start your experiment, simply drag the icon that is to the left of the file name (see figure below) from the middle (Prepare) to the right (Execute) window. That will automatically fill out the experiment relevant information in this window and allow you to start the actual experiment by clicking on the "Start Experiment" button. [[Image(LW_wiki_flowstats1.png, 80%)]] Explanation of the fields in the Execute window: * name: In this field you specify the name of your experiment. * project: This pull-down menu list all the projects you are currently a member of. Select the project that contains the slice you want to run your experiment on. * experiment context: With the context you can specify a certain set of experiments. E.g., a series of experiments you run under a certain set of startup parameters. * slice: This pull down menu lists all slice that have been created under "project". Select the slice you to run your experiment on. === 3.1.4 During experiment execution === After pressing the "Start" button, the Execute window will change and start showing status information about your experiment. The figure below gives an example for the Execute window during experiment execution. [[Image(LW-executing.png, 80%)]] Now the window lists experiment properties, one or several live graphs (if they have been specified in the OEDL script), and logging information. The latter would be a good starting point for trouble shooting, should your experiment not run as expected.