[surye]

Since the abstraction is NFS for access, I wonder what the advantage over EFS is. Or more, why not just leverage this under EFS if it was a straight improvement. Compression and snapshots seem like some of the biggest wins over current EFS.

[pram]

EFS performance is garbage compared to FSx for most things. They serve different purposes.

[STRML]

Compression and snapshots indeed are the largest improvements I see, as well as an order-of-magnitude higher performance. If your applications already rely on ZFS snapshots, filesystems, quotas, reservations, compression, etc. - this is a pretty huge release as it appears to enable a convenient multi-reader workflow without significant administration headaches.