Recommended file extension for Feather files

[jason-s]

Python cookbook uses .feather (https://github.com/apache/arrow-cookbook/blob/90cdc3c5516f475149f172f869a1538cc50e8e68/python/source/io.rst#L535)

Arrow docs suggest .arrow instead of .feather https://arrow.apache.org/docs/format/Columnar.html#ipc-file-format

Which is it?

[lidavidm]

It should be .arrow

[jason-s]

So Feather is the primary on-disk serialization format for Arrow? (It's just a bit weird to get used to: these are Feather files, and the Python module is pyarrow.feather, and the function name is write_feather, but the recommended extension is .arrow)

[lidavidm]

They are the same thing. https://stackoverflow.com/questions/67910612/arrow-ipc-vs-feather/67911190#67911190

[jason-s]

OK then I feel comfortable filing apache/arrow#38515