We've spent several hours to split our input data into several parquet
files (or several folders, i.e.
/datasink/output-parquets/<key>/foobar.parquet), based on a low-cardinality
key. This works very well with a when using saveAsHadoopFile, but we can't
achieve a similar thing with Parquet files.
The only working solution so far is to persist the RDD and then loop over
it N times to write N files. That does not look acceptable...
Do you guys have any suggestion to do such an operation?
Head of Backend/Infrastructure
50, avenue Montaigne - 75008 Paris