Some months ago i wrote how to (ab)use your database as a messagequeue in order to distribute tasks among worker-processes.
"From your code, it also looks like having more than one demon will put you at risk of processing the same jobs more than once." (Jerome Eteve)
"Abuse" is the right word. The moment you hit more than three concurrent jobs, you will see a nasty slowdown ..." (rob.kinyon)
The comments made pretty clear that this was not a go…