[](https://wesmckinney.com/blog/arrow-streaming-columnar/#cb2-1)KILOBYTE = 1 << 10
[](https://wesmckinney.com/blog/arrow-streaming-columnar/#cb2-2)MEGABYTE = KILOBYTE * KILOBYTE
[](https://wesmckinney.com/blog/arrow-streaming-columnar/#cb2-3)DATA_SIZE = 1024 * MEGABYTE
[](https://wesmckinney.com/blog/arrow-streaming-columnar/#cb2-4)NCOLS = 16
[](https://wesmckinney.com/blog/arrow-streaming-columnar/#cb2-5)
[](https://wesmckinney.com/blog/arrow-streaming-columnar/#cb2-6)df = generate_data(MEGABYTE, NCOLS)