Is Dask proper to read large csv files in parallel and split them into multiple smaller files?

Yes, dask can read large CSV files. It will split them into chunks

df = dd.read_csv("/path/to/myfile.csv")

Then, when saving, Dask always saves CSV data to multiple files

df.to_csv("/output/path/*.csv")

See the read_csv and to_csv docstrings for much more information about this.

• dd.read_csv
• dd.DataFrame.to_csv