jihoonson commented on issue #8061: Native parallel batch indexing with shuffle
URL: 
https://github.com/apache/incubator-druid/issues/8061#issuecomment-537287192
 
 
   > with 0 `requiredCapacity` overlord would try and send them to MM but MM 
would reject them saying its full, no ?
   
   Hmm, I just tested with `RemoteTaskRunner` and it worked. Is MM supposed to 
reject it?
   
   > yes, I meant reserve something else and not task slots i.e. maybe a 
"supervisor slot" concept.
   
   Sounds good. I was thinking a task scheduler respecting task priority. Like, 
it can schedule high priority tasks more often, but also should be able to 
avoid starvation for low priority tasks. Maybe the supervisor slot concept can 
go along with this idea together.
   
   > For other reliability reasons, maybe also a first class "Supervisor" class 
like "Task" ... handling of "Supervisor" could be different than that of a Task 
e.g. all Supervisors are always restartable , unlike Tasks they are not failed 
if a MM running them dies and instead they are re-run etc.
   
   Also sounds good. 

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