ComputingCondor < Main

---+ Condor quick start

This page is supposed to guide users to start using Condor in our T3 infra-structure, only mentioning the very essential, adaptations can be done from there and integrated in this page.

The submission host is our usual t3-higgs login node. Everything is already setup so you can submit from your home area. Nodes passed the usual checklist.

---++ Preparing the job for submission

The recommended is that you separate a directory for this. In my case, the job is a bash script that prints "alive" and sleeps for X seconds. Here's how my directory looks like :

<verbatim>
-bash-3.2$ ll
-rw-r--r-- 1 samir users     0 May 28 12:59 sleep.err
-rw-r--r-- 1 samir users 31355 May 28 14:53 sleep.log
-rw-r--r-- 1 samir users     5 May 28 14:42 sleep.out.1
-rwxr-xr-x 1 samir users    35 May 28 14:42 sleep.sh
-rw-r--r-- 1 samir users   116 May 28 14:43 submit.sub
</verbatim>

Now we will look at our submit.sub (you can call it anything). This is the file that will tell Condor what to do :

<verbatim>
Executable = sleep.sh
Universe = vanilla
Output = sleep.out.$(Process)
Log = sleep.log
Error = sleep.err
Queue
</verbatim>

It couldn't be simpler. Don't ever change the Universe. All the rest is self-explanatory. The Queue parameter tells condor how many copies of this very same job we want to send, default is 1. I could do :

<verbatim>
Queue 4
</verbatim>

And have 4 identical jobs running. That's when the $(Process) variable makes a difference, the output files will be called in the same directory :

<verbatim>
-rw-r--r-- 1 samir users     5 May 28 14:42 sleep.out.1
-rw-r--r-- 1 samir users     5 May 28 14:42 sleep.out.2
-rw-r--r-- 1 samir users     5 May 28 14:42 sleep.out.3
-rw-r--r-- 1 samir users     5 May 28 14:42 sleep.out.4
</verbatim>

---++ Submitting the job(s)

Once you got familiar with how to configure your job, is time to submit it :

<verbatim>
-bash-3.2$ condor_submit submit.sub 
Submitting job(s)....
4 job(s) submitted to cluster 32.
</verbatim>

Then you can monitor with :

<verbatim>
-bash-3.2$ condor_q


-- Submitter: t3-higgs.ultralight.org : <10.4.255.253:43446> : t3-higgs.ultralight.org
 ID      OWNER            SUBMITTED     RUN_TIME ST PRI SIZE CMD               
  15.0   amott           7/2  11:18   0+00:00:00 H  0   17.1 ZeeSelectorApp    
  32.0   samir           5/28 15:13   0+00:00:25 R  0   0.0  sleep.sh          
  32.1   samir           5/28 15:13   0+00:00:25 R  0   0.0  sleep.sh          
  32.2   samir           5/28 15:13   0+00:00:25 R  0   0.0  sleep.sh          
  32.3   samir           5/28 15:13   0+00:00:25 R  0   0.0  sleep.sh          

5 jobs; 0 completed, 0 removed, 0 idle, 4 running, 1 held, 0 suspended
</verbatim>

Or if you want to go do something else and they are gone later, you can confirm that they actually finished by spotting them on the history :

<verbatim>
-bash-3.2$ condor_history
 ID     OWNER          SUBMITTED   RUN_TIME     ST COMPLETED   CMD            
  31.3   samir           5/28 14:43   0+00:05:05 C   5/28 14:53 /home/samir/condor-test/sleep.sh 
  31.2   samir           5/28 14:43   0+00:05:04 C   5/28 14:53 /home/samir/condor-test/sleep.sh 
  31.1   samir           5/28 14:43   0+00:05:03 C   5/28 14:48 /home/samir/condor-test/sleep.sh 
  31.0   samir           5/28 14:43   0+00:05:03 C   5/28 14:48 /home/samir/condor-test/sleep.sh 
  30.3   samir           5/28 14:42   0+00:00:09 C   5/28 14:42 /home/samir/condor-test/sleep.sh 
  30.2   samir           5/28 14:42   0+00:00:09 C   5/28 14:42 /home/samir/condor-test/sleep.sh 
</verbatim>


With this, you should be able to do the basic. Feel free to edit this page and add more content and tips from your experiences.

-- Main.samir - 2014-05-28
This topic: Main > ComputingCondor
Topic revision: r1 - 2014-05-28 - samir
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