[WIP] Worker outgoing backpressure#1768
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mrocklin wants to merge 3 commits intodask:masterfrom
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When engaging in heavy communication we would prefer that workers pause ongoing work rather than spill excess data to disk. This applies back pressure to the computational system when the communication system is under stress and generally keeps things more even.
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This adds outgoing backpressure to workers. It stops situations where they may be computing too much while waiting for data.
I started work on this, but then stopped. I'm pushing it here just so that I don't forget where it is. Will close shortly after opening.