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Posted to github@arrow.apache.org by GitBox <gi...@apache.org> on 2021/08/13 02:35:47 UTC

[GitHub] [arrow-datafusion] andygrove opened a new issue #867: ParquetExec should parallelize statistics scan operations

andygrove opened a new issue #867:
URL: https://github.com/apache/arrow-datafusion/issues/867


   **Is your feature request related to a problem or challenge? Please describe what you are trying to do.**
   ParquetExec currently uses a single thread to iterate over all input files and collect statistics. This can be very slow at scale (> 30 seconds) and it would be good to parallelize this work.
   
   **Describe the solution you'd like**
   Use tokio to scan each file in parallel.
   
   **Describe alternatives you've considered**
   N/A
   
   **Additional context**
   N/A
   


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