Re: [Condor-users] condor and web services

[Matthew Farrellee <matt@xxxxxxxxxxx>]

diane wrote:
> Hi  there,
>
>  
>
> I’m fairly new to condor and windows and have been reading the emails 
> about using web services to interface with condor.
>
> I’d like to get more information on this.  Is there documentation on 
> that specifically?

There is documentation in the manual under "Application Programming 
Interfaces" and in old Condor Week presentations:

	http://www.cs.wisc.edu/condor/CondorWeek2006/presentations.html


> I have a java application that is deployed to a web service container 
> (axis1.6 within tomcat 5), accessed via port 9090, running under Windows 
> XP, on a dual processor Dell Optiplex 745.
>
> I have condor 6.8.5 installed on the Dell which is the condor master 
> machine.  There are no other ‘slave’ machines at this time, but the 
> intention is to eventually install condor on a cluster of Windows 
> machines.  In that eventual scenario,  there would be a ‘condor master’ 
> and multiple ‘condor slaves’, all running Windows XP.
>
> My java  application calls condor_submit (using 
> Runtime.getRuntime().exec(CondorSubmitCmmand))  to put several (up to 
> 24) duplicate MS_DOS scripts into the condor queue, each with different 
> arguments.  The batch script is actually a wrapper around a Perl 
> script.  Each of those scripts then starts another java application (via 
> ‘system(“java …..”)’, again each with different arguments.
>
> This setup seems to work using only the condor master machine, where two 
> jobs can run at a time, while the rest wait in the queue, and I assume 
> will continue to work when I eventually add the cluster of windows 
> machines.  Note that this whole setup was working fine running under 
> linux, with  a linux master and a cluster of linux slaves.

Two jobs run because it is dual core. You'll need to make sure that your 
Perl script is not specific to your "master" machine.


> However, I wonder if there is a better way to do this using web services 
> to interface with condor.  Hence my question.
>
> Is there documentation on this?

Off the top of my head I think you should start using the Java Universe 
instead of executing a Perl script that does a system("java ..."). You 
can find information about the Java Universe in the manual. Also, if you 
want to avoid the exec from Java to submit your jobs you should 
definitely have a look at the Birdbath API. There is a tutorial for it 
in the list of presentations in the link above.


Best,


matt


> Thanks,
>
> Diane.