Github user chenghao-intel commented on the pull request: https://github.com/apache/spark/pull/6864#issuecomment-113042193 Thank you @liancheng for the summary, which is clear for me who didn't dive into this part before. One thing that I am think about when I review the code #6833, how to remove the redundant files when user switch on the `speculative` in writing data via data source interface?
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