Delete files when their owner is deleted

How to do it

Make the delete job remove objects first, then rows, so a crash leaves rows to retry rather than unknown objects. On versioned buckets delete every version, or the file lives on. Include derived files, such as thumbnails and rebuilt images. Run a weekly sweep that lists the bucket and compares it with the table. Delete objects with no row that are older than 7 days. The request side, time limits and backups are in let people see and delete their data.

How to check

Create a test owner with an upload, a thumbnail and two versions of a file. Delete the owner. A listing of the owner's prefix, including old versions, is empty. The weekly sweep reports zero objects without a row.