ozone

Ozone is a pure-rust key/value store inspired by the language's built-in concept of memory ownership.

Goals

The goal of this project is to build a perfectly idiomatic persistence layer initially using the standard library's collections::HashMap as a model, letting the language itself do as much as possible.

Specific features that will be implemented include:

• single-file databases

• copy-on-write, lock-free MVCC

• recycling of emptied pages

Proposed API

The API will be identical to that provided by collections::HashMap, including an Entry API:

pub struct HashMap<K, V, B = AnonymousBuffer> {
    fn entry(&mut self, key: K) -> Entry<K, V>;
    fn len(&self) -> usize;
    fn is_empty(&self) -> bool;
    fn get(&self, k: &K) -> Option<&V>;
    fn contains_key(&self, k: &K) -> bool;
    fn get_mut(&mut self, k: &K) -> Option<&mut V>;
    fn insert(&mut self, k: K, v: V) -> Option<V>;
    fn remove(&mut self, k: &K) -> Option<V>;
}

Why The Name?

Ozone, or O₃ is a powerful oxidant (oxidation/reduction is the chemical process of rusting) that is naturally created from O₂ (the stuff we breathe) when a bolt of lightning strikes.

License

Licensed under

• Mozilla Public License 2.0 (LICENSE or http://www.mozilla.org/en-US/MPL/2.0/)

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the MPL-2.0 license, shall be licensed as above, without any additional terms or conditions.