Changes between Initial Version and Version 1 of Tutorial/HowToApplication

Timestamp:

Nov 20, 2007, 12:49:47 AM (17 years ago)

Author:

thierry

Comment:

—

Tutorial/HowToApplication

@@ +1 @@
+
+Go back --> [wiki:Tutorial Tutorials]
+
+== How to use execute an application on the nodes ==
+
+This feature is only available in NodeHandler v4 and above.
+
+Before going through this tutorial, you should know [wiki:Tutorial/HowToImage how to install a disk image]. 
+
+You should also have installed a disk image with Node Agent v4 on the nodes of the testbed you are using (e.g. "baseline-7.11.ndz").
+
+=== Goal ===
+
+In this tutorial, you will learn a simple way to execute an application on the nodes of a testbed.
+  
+=== The tutorial experiment ===
+
+This experiment is given in the attached script [attachment:tut_app_1.rb tut_app_1.rb]. 
+
+This file contains extensive comments that should help you understand the different steps involved in executing a shell command on the nodes of a testbed. It also shows how you could process the command outputs, e.g. redirect them to a text file.
+
+For more information on the basics of writing and using an experiment script, please refer to the previous tutorials, [wiki:Tutorial/HowtoWriteScripts here] and [wiki:Tutorial/HelloWorld here].
+
+To run this example script, use the following command:
+
+ {{{
+  nodehandler4 tut_cmd_1
+ }}}
+
+(This assumes that you previously logged in to a testbed, and imaged its nodes with a disk image such as "baseline-7.11.ndz".)
+
+=== The Results ===
+
+The experiment screen output should then look like [attachment:sb1_2007_11_19_18_45_06-Output.txt this]. And the experiment log file should look like  [attachment:sb1_2007_11_19_18_45_06.log this]. 
+
+=== More... ===
+
+This method of executing a shell command on nodes is well suited for one-off or temporary experiments. If you plan on re-using or sharing the same commands among multiple experiment scripts, then you should consider [wiki:Tutorial/HowtoApplication this other method] which uses application definition.