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Experiment 1

Overview

The objective of this first step is to show how to design, execute, and view the result of a very simple experiment using LabWiki and OEDL.

The scenario of this simple experiment involves 2 computing resources (i.e. ExoGENI virtual machines), which will send ping probes to each other, and report the observed delays.

As mentioned ​earlier, the resources for this experiment have already been allocated and provisioned. Thus at this stage, you should have received the names of your allocated resource, if not please let the session presenters know.

Part 1 - Design/Setup

For help on all actions regarding LabWiki, please refer to the previous page

1.1. First, if you have not done it yet, login into LabWiki

1.2. Create a new experiment file with the name of your choice

1.3. Cut-and-paste the following experiment description into that file, then save it

defProperty('resource1', "your_resource_ID", "ID of a resource")
defProperty('resource2', "your_resource_ID", "ID of a resource")

defApplication('ping') do |app|
  app.description = 'Simple Definition for the ping-oml2 application'
  app.binary_path = '/usr/bin/ping-oml2'
  app.defProperty('target', 'Address to ping', '', {:type => :string})
  app.defProperty('count', 'Number of times to ping', '-c', {:type => :integer})
  app.defMeasurement('ping') do |m|
    m.defMetric('dest_addr',:string)
    m.defMetric('ttl',:uint32)
    m.defMetric('rtt',:double)
    m.defMetric('rtt_unit',:string)
  end
  app.defMeasurement('rtt_stats') do |m|
    m.defMetric('min',:double)
    m.defMetric('avg',:double)
    m.defMetric('max',:double)
    m.defMetric('mdev',:double)
    m.defMetric('rtt_unit',:string)
  end
end

defGroup('First_Peer', property.resource1) do |g|
  g.net.e1.ip = "192.168.100.100/24"
  g.addApplication("ping") do |app|
    app.setProperty('target', '192.168.100.200')
    app.setProperty('count', 10)
    app.measure('ping', :samples => 1)
    app.measure('rtt_stats', :samples => 1)
  end
end
 
defGroup('Second_Peer', property.resource2) do |g|
  g.net.e1.ip = "192.168.100.200/24"
  g.addApplication("ping") do |app|
    app.setProperty('target', '192.168.100.100')
    app.setProperty('count', 15)
    app.measure('ping', :samples => 1)
    app.measure('rtt_stats', :samples => 1)
  end
end

onEvent(:ALL_UP_AND_INSTALLED) do |event|
  info "This is my first OMF experiment"
  group('First_Peer').startApplications
  after 5.seconds do
    group('Second_Peer').startApplications
  end
  after 30.seconds do
    Experiment.done
  end
end

defGraph 'RTT1' do |g|
  g.ms('ping').select {[ :oml_sender_id, :oml_ts_client, :oml_ts_server, :rtt ]}
  g.caption "Round Trip Time (RTT) reported by each resource"
  g.type 'line_chart3'
  g.mapping :x_axis => :oml_ts_client, :y_axis => :rtt, :group_by => :oml_sender_id
  g.xaxis :legend => 'time [s]'
  g.yaxis :legend => 'RTT [ms]', :ticks => {:format => 's'}
end

defGraph 'RTT2' do |g|
  g.ms('rtt_stats').select {[ :oml_sender_id, :avg ]}
  g.caption "RTT Comparison Between Resources [ms]"
  g.type 'pie_chart2'
  g.mapping :value => :avg, :label => :oml_sender_id
end

Part 2 - Execute

Part 3 - Finish

Help & Additional Resources

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