nessie-backend-core

Core domain vocabulary for nessie-store — a cheap ONTAP on-ramp. This crate defines the substrate-neutral types and the VolumeBackend ⊂ SnapshotBackend ⊂ CloneBackend supertrait stack that every storage backend implements. The PyO3 bindings expose the domain vocabulary to Python so you can script against the system (the "outside" extension surface).

Install

pip install nessie-backend-core      # Python
cargo add nessie-backend-core        # Rust

Usage (Python)

import nessie_backend_core as core

# A request to create a 50 GiB volume.
spec = core.VolumeSpec("build-cache", size_bytes=50 * 2**30)
print(spec)                       # VolumeSpec(name="build-cache", size_bytes=...)

# Declare what a backend can do — and check the tiers are self-consistent.
caps = core.Capabilities(snapshots=True, clones=True)
assert caps.is_consistent()
assert caps.snapshots and caps.clones

# A sparse PATCH (resize + set the NFS junction).
patch = core.VolumePatch(size_bytes=100 * 2**30, junction_path="/build")
assert not patch.is_empty()

Usage (Rust)

use nessie_backend_core::{Capabilities, VolumeSpec};

let spec = VolumeSpec::named("build-cache");
assert!(Capabilities::clones().is_consistent());

Dual-licensed MIT OR Apache-2.0.