[condor-users] Speeding up DAGman submits

["David E. Konerding DSD Staff" <dekonerding@xxxxxxx>]

Hi,

we are submitting a small DAG with very few jobs to DAGman (test jobs 
such as ls) and noticed
that it takes about 20-25 seconds for the CONDOR job that DAGman submits 
to the queue to go from the
idle to running state.  I've tried to figure out which condor_config 
file options affect this time (by reading the comments in condor_config 
and the manual section defining all the parameters), but haven't had 
much luck.  I've also straced and read log files, but this hasn't been 
particularly informative either.

Some of the ideas I had include:

0) tuning condor_config parameters to speed this up (less than 1-5 
seconds is best); haven't been able to find the right tunables
1) using the 'test job feature' for fast turnaround time.  Can this be 
applied to DAGman jobs?
2) Computing on Demand.  This is a pretty confusion section of the 
manual and while the introduction suggests this would be useful,
closer reading of the functionality seems to suggest it's used for 
running jobs that can be preempted but quickly reactivated when needed;
not exactly a good match to DAGman.

Dave
Condor Support Information:
http://www.cs.wisc.edu/condor/condor-support/
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