[russross]

I'm not sure it would interact nicely with the request authentication system that S3 uses.

I think a generic cache layer would be a better solution. A bit of googling turns up fuse-cache, which sounds like about the right thing (although I haven't actually examined it in detail), or fs-cache, which also sounds like a discrete cache layer to be added to any file system. Basically, you mount it, and it passes requests through to any other mount (like s3fslite) while adding an on-disk cache layer.

I haven't tested any of these, but that seems like an approach worth pursuing.

- Russ