milenkovicm commented on issue #1344:
URL: 
https://github.com/apache/datafusion-ballista/issues/1344#issuecomment-3641482816

   thank you @danielhumanmod  for tackling this issue, I think it would bring 
few new possibilities if implemented .
   
   I'm not sure if we should utilise shuffles as base building block. Let's say 
we want to implement distributed cache functionality or some kind of job 
preparation, they may be reading from source which is not a shuffle file. 
   
   Would it be possible to keep job submission pending until another job 
finishes? If we can attach a callback on a "leading" job which would  change 
dependant job status from "pending" to "ready to run"  or to "cancel".
   
   I'm just throwing ideas, will have to take a deeper look at this 


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