Orbit > Planetlab-ORBIT Integrated demo

Planetlab-ORBIT integrated demo

Revision History

Version	Date	Revised by	Changes
v0.1	2006-06-04	Sachin Ganu	Initial version

Objective

The objective of this demo is to show the federation of the two heterogeneous testbeds: Planetlab and ORBIT. This demonstration illustrates a typical wireless hotspot scenario with one node in the ORBIT testbed fetching video media off a remote Planetlab node and serving it to a fixed and mobile client.

The demo has been choreographed to use nodes 17-2 and 17-7, where 17-2 is the hotspot AP that fetches the media content off a remote Planetlab node pli2.pa-1.hpl.hp.com and serves it to node17-7 as well as the robot based mobile node.

Bitrate (in kbps) is measured by the receiving node and reported to the ORBIT infrastructure using the OML library.

A representative picture of the scenario is shown below

Steps to Execute Demo

1. Image name — planetlab-biggrid.ndz. Resides on repository2:/export/orbit/image.
   1. Log onto console.grid.orbit-lab.org using ssh (see HowToGetStarted)
   2. Execute the following command on console.grid.

      imageNodes [17,2],[17,7] planetlab-biggrid.ndz
      

2. Download the tarball nodehandler-planetlabdemo.tar.gz from the link provided at the bottom of this page

3. After extracting the tarball in your home directory,

     cd nodehandler/src/ruby
     ruby handler/nodeHandler.rb -k test:exp:planetlab
   

3. Display machine

On the display machine, point your Internet Explorer or Mozilla Firefox browser to ​http://internal3.orbit-lab.org/planetlab.html. This page should automatically populate the database name based on the current experiment id, and after selecting bitrate and wireless client, and clicking on Submit, you should be able to see the estimated measure of the bitrate at which the video stream is being played in kbps. Whenever the media content is relatively static, the bitrate is low, when there is more action, the bitrate is higher.

Prerequisites

1. You need to have established ssh keys with the Planetlab server that is hosting the media stream (in our case, pli2.pa-1.hpl.hp.com) In order to do so, run the following from console.grid

   ssh-keygen -t rsa
   

   This will prompt you for a passphrase and you can choose to save this key-pair to file called planetlab-rsa Next

    ssh-copy-id -i ~/.ssh/planetlab-rsa.pub orbit_pkamat@pli2.pa-1.hpl.hp.com
   

   This will transfer the keys to the Planetlib slice on the host pli2.pa-1.hpl.hp.com. You may choose to have this key copied on multiple PLanetlab nodes that belong to your slice (e.g pli2.pa-2.hpl.hp.com, pli2.pa-3.hpl.hp.com, alice.cs.princeton.edu)

All these nodes currently have the media stream to be served for this demo.