- Views data export | drupal.org
This module is designed to provide a way to export large amounts of data from views. It provides a display plugin that can rendered progressively in a batch
- Using Batch API to build huge CSV files for custom exports | Midwestern Mac, LLC
I’ve seen many tutorials, blog posts, and examples for using Drupal’s Batch API for importing tons of data, but very few (actually, none) for exporting tons of data—and specifically, in my case, building a CSV file with tons of data for download.