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temporary folders for YARN tasks
When a YARN app and its tasks wants to write temporary files, how does it know where to write the files?
I am assuming that each task has some temporary space available, and I hope it is available across multiple disk volumes for parallel performance.
Are those files cleaned up automatically after task exit?
If I want to give lifetime control of the files to an auxiliary service (along the lines of MR shuffle passing files to the aux service), how would I do that, and would that entail different file locations?