Re: [Condor-users] Visualizing a cyclic DAGs with dot

["R. Kent Wenger" <wenger@xxxxxxxxxxx>]

On Fri, 21 Aug 2009, Maria Jonas wrote:

> I know that DAGMan can assist you in visualizing a DAG with dor.
>
> I would like specify a CYCLIC graph with DAGMan instead and then 
> visualize it with dot.
>
> Is this possible and how?

It should be sort of possible.  If you have DAGMAN_STARTUP_CYCLE_DETECT 
set to false (or not set at all), DAGMan won't actually check for a cycle 
in the graph at startup time.  (The default is false because that's a 
pretty expensive operation.)

So DAGMan will run the workflow until it hits the point when it finds out 
that there's a cycle.  If you have it set up to generate a DOT file
(see 
http://www.cs.wisc.edu/condor/manual/v7.3/2_10DAGMan_Applications.html#SECTION003109000000000000000)
you should get something you can view in dot.  I suspect that you won't 
get an update right at the end, though.

I don't think we've ever tried this, so take this info with a grain of 
salt.  But I think it's worth trying, anyhow.

Kent Wenger
Condor Team