Show HN: ZeroFS – A log-structured filesystem for S3

ZeroFS is a log-structured filesystem that exposes S3-compatible storage buckets as POSIX filesystems over NFS and 9P protocols, and as raw block devices over NBD, all running in a single userspace process. Data is written as immutable, compressed, and encrypted segments to S3, with warm reads served from local cache, and the system supports geo-distributed deployments across multiple cloud regions. The project includes extensive testing across POSIX semantics, kernel builds, stress tests, and deterministic simulations to ensure reliability.