[kepler-dev] Re: Globus Job in Kepler

[Matt Jones]

Hi Bill,

Well, the best place for help in general is the 
kepler-dev at ecoinformatics.org mailing list.  All of the developers get 
those messages, so somebody there will certainly be able to help you out.

The globus actors we have now are meant to be used for submitting 
computational jobs to a managed job service in the GT2 sense.  You can't 
really call the GT3 web services style of service this way.  Instead, 
what you do is create a job submission script (written in the RSL 
language) and send that to the machine on which it should run after 
having used the GlobusProxy actor to create a proxy for yourself.  The 
example workflow in the Kepler distribution uses this example RSL:

"&(executable=/bin/cat)(arguments=/tmp/pas.local)"

which basically means to run the 'cat' command cagainst the file named 
in the /tmp directory.  They try to run it on "griddle.sdsc.edu". Most 
people run more interesting executables, such as simulation models, but 
this is just an example.  RSL has means for expressing most aspects of 
the job, such as where the output goes.  You can find documentation on 
RSL on the http://www.globus.org site.

There's a configured example workflow using the Grid actors that ships 
with Kepler in "workflows/test/nmiworkflow-example.xml".  This can be 
also reached from a link on the main intro page that opens when you 
start Kepler.  This workflow shows how the trigger on GlobusJob can be 
used to make sure that a data file has been transferred using GridFTP 
before the computational job runs.

Hope this helps.

Matt

Shipman, William J. wrote:
> Mr.Jones,
> 
> I am a student at the University of North Carolina at Wilmington, I am doing some research on grid technology and would like to experiment with your software.  I have Globus set up and have created the sample counter grid service that is in the Globus 3.0 documentation.  I have a certificate authority set up and can run the service securely through a java application, but I wanted to try using a graphical interface to help illustrate the power of grids.  I am having some problems figuring out the Globus job actor and can find no documentation on the Kepler site.  I am unsure as to what a RSL string is, nor am I sure what to put as Globus host string, the full path to my service? (http://localhost:8080/ogsa/services/first/counterservice ?)  I came by your email address from the SEEK website since I could find no contact information on the Kepler site.  If you can't help please feel free to forward this on to anyone who can be of assistance.
> 
> Thanks
> Bill Shipman

-- 
-------------------------------------------------------------------
Matt Jones                                     jones at nceas.ucsb.edu
http://www.nceas.ucsb.edu/    Fax: 425-920-2439    Ph: 907-789-0496
National Center for Ecological Analysis and Synthesis (NCEAS)
University of California Santa Barbara
Interested in ecological informatics? http://www.ecoinformatics.org
-------------------------------------------------------------------