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DNM: Dumb Read Parquet Implementation #373

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DNM: Dumb Read Parquet Implementation #373

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Commits on Oct 30, 2023

  1. DNM: Dumb Read Parquet Implementation 

    This is a dumb, mostly-from-scratch implementation of read_parquet.

It only supports
-  local and s3
-  column selection
-  grouping partitions when we have fewer columns (+ threads!)
-  arrow engine/filesystem

It is very broken in many ways, but ...

-  It's only around 100 lines of code
-  I get 250 MB/s bandwidth on full column reads on an m6i.xlarge
   (only 50 MB/s when reading columns though)

See dask/dask#10602
    @mrocklin
    mrocklin committed Oct 30, 2023
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  2. Use PyArrow dataset for metadata

    @mrocklin
    mrocklin committed Oct 30, 2023
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