Configuration: enable this feature, and set the time interval beyond which files should be deleted.
How similar is this to the existing cache? Can we leverage that, or at least use some of the same conventions?
It is very important that this data remain transparent to admins; we could do a lot worse than a directory structure with JSON files. If space is an issue, we could consider gzipping some of them.
Recovery tool should take the spooled data and submit it to a given PDB