cloud-fan commented on issue #25299: [SPARK-27651][Core] Avoid the network when shuffle blocks are fetched from the same host URL: https://github.com/apache/spark/pull/25299#issuecomment-527029909 > Another idea would be to have the executors communicate via the filesystem This seems a better idea to me. Furthermore, if executor's data dir path is constructed deterministically with the executor id, then we can access data files of other executors directly within the same host.
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