wiki:Documentation/CGettingStarted

Version 80 (modified by ssugrim, 11 years ago) ( diff )

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How to get started

First, you will need an ORBIT account. Please check the usage policy if you are eligible. Typically, in order to get an account,one would have to ​register for an account and get it approved by the PI in charge of the project/institution they wish to be part of. If particular institution is not available, the appropriate PI can ​register for an institutional account.

A typical experiment requires the following five steps:

  1. Create reservation:
    Before you can access the testbed,you need to ​make a reservation and get it approved by the reservation service. First time users are highly encouraged to reserve time on a sandbox instead of the main grid, and start with this built-in Hello World experiment. For the rest of this tutorial we will assume that user reserved sb1.
  2. Access the domain: After you receive the confirmation email, you can access the reserved domain by ssh to the corresponding domain console. 
      ssh username@sb1.orbit-lab.org
  3. Load the images: Prior to executing the "Hello World" experiment, users need to install an image on the hard disks of the nodes. For this tutorial we will use baseline.ndz. This image is built on top of Ubuntu 12.04, and is pre-configured with the proper modules and start up scripts to take advantage of the rest of the Orbit software / hardware. The imaging process will turn the nodes back off after completing imaging. At this point the nodes disks are imaged with the baseline image and need to be turned back on before proceeding. 
    username@sb1.orbit-lab.org:~$ omf tell -a offh -t all
...
username@sb1.orbit-lab.org:~$ omf load -i baseline.ndz -t all
...
username@console.sb1:~$ omf tell -a on -t all

Give the nodes a couple of minutes to turn on / boot, then check their status with omf stat

  1. Run the experiment: Execute "Hello World" experiment. This is a simple wireless experiment that establishes the WiFi link between two nodes and transfers data for 60 seconds. Be sure to specify the fully qualified domain names (FQDNs) of the two nodes involved. For the output below, it is assumed to be "sb1.orbit-lab.org". 
    username@console.sb1:~$ omf exec test:exp:tutorial:hello-world-wireless -- --res1 node1-1.sb1.orbit-lab.org --res2 node1-2.sb1.orbit-lab.org
 INFO NodeHandler: OMF Experiment Controller 5.4 (git c005675)
 INFO NodeHandler: Slice ID: default_slice (default)
 INFO NodeHandler: Experiment ID: default_slice-2013-01-29t01.03.19-05.00
 INFO NodeHandler: Message authentication is disabled
 INFO Experiment: load system:exp:stdlib
 INFO property.resetDelay: resetDelay = 230 (Fixnum)
 INFO property.resetTries: resetTries = 1 (Fixnum)
 INFO Experiment: load system:exp:eventlib
 INFO Experiment: load test:exp:tutorial:hello-world-wireless
 INFO property.duration: duration = 60 (Fixnum)
 INFO property.graph: graph = false (FalseClass)
 INFO Topology: Loading topology 'system:topo:imaged'.
 INFO Topology: Loading topology '/tmp/pxe_slice-2013-01-26t22.21.22-05.00-topo-success'.
 INFO ALL_UP_AND_INSTALLED: Event triggered. Starting the associated tasks.
 INFO exp: This is my first OMF experiment
 INFO exp: Request from Experiment Script: Wait for 15s....
 INFO node1-1.sb1.orbit-lab.org: Device 'net/w0' reported Not-Associated
 INFO node1-2.sb1.orbit-lab.org: Device 'net/w0' reported Not-Associated
 INFO node1-1.sb1.orbit-lab.org: Device 'net/w0' reported 12:B2:78:8E:8D:4F
 INFO node1-2.sb1.orbit-lab.org: Device 'net/w0' reported 12:B2:78:8E:8D:4F
 INFO exp: All my Applications are started now...
 INFO exp: Request from Experiment Script: Wait for 60s....
 INFO exp: All my Applications are stopped now.
 INFO EXPERIMENT_DONE: Event triggered. Starting the associated tasks.
 INFO NodeHandler: 
 INFO NodeHandler: Shutting down experiment, please wait...
 INFO NodeHandler: 
 INFO run: Experiment default_slice-2013-01-29t01.03.19-05.00 finished after 1:23

username@console.sb1:~$
  2. Analyze the results

Use various tools to analyze the results.

  1. (optionally) Save the image If you modified the basiline image and/or added software to it, you want to save it into repository before the end of your time slot!

Where to go from here

If you are still unsure what Orbit is, please read the FAQ and check other tutorials.

Note: See TracWiki for help on using the wiki.