Show HN: ZeroFS presents S3 as POSIX filesystems and block devices

Category: Pulse
Status: discussion
Sources: ZeroFS, Show HN discussion
Summary: ZeroFS, a Show HN that reached 122 points, is a userspace log-structured filesystem that exposes S3-compatible object storage as POSIX filesystems over NFS and 9P and as raw block devices over NBD. Data is written as immutable segments, compressed with zstd or lz4 and encrypted with XChaCha20-Poly1305 before upload. It is dual-licensed AGPL-3.0 and commercial.
Comments: Commenters compared it to JuiceFS, SeaweedFS, and s3fs and questioned metadata latency and log-structured compaction pauses over a remote store, and warned that per-object read cost dominates when fetching data in 128 KiB parts. Several were skeptical of trusting storage to what they read as an AI-generated project and codebase.