Architecture
Metadata Layer
Pluggable transactional metadata: SQLx, Redis, etcd, TiKV.
The metadata layer stores the namespace, directory entries, inode attributes, file sizes, chunk metadata, slice descriptors, and transactional state.
Backends are pluggable so teams can explore latency, consistency, and operational trade-offs:
- SQLx — SQLite for local development; PostgreSQL / MySQL for shared setups.
- Redis — lowest-latency metadata operations.
- etcd — strongly consistent, clustered.
- TiKV — horizontally scalable transactions.
Agent workloads are metadata-heavy (readdir, stat, lookup, rename, getattr), which is why the metadata-heavy benchmark isolates this path.