crabstash

A high-performance embedded database written in Rust, featuring LSM-tree storage and MVCC transactions.

Features

• LSM-tree storage engine - Write-optimized with background compaction
• MVCC transactions - Snapshot and serializable isolation levels
• Write-ahead logging - Durability guarantees with crash recovery
• Bloom filters - Fast negative lookups
• Embedded library - Link directly into your application

Quick Start

use crabstash::Db;

fn main() -> crabstash::Result<()> {
    let db = Db::open("my_data")?;

    db.put("hello", "world")?;

    if let Some(value) = db.get("hello")? {
        println!("{}", String::from_utf8_lossy(&value));
    }

    db.delete("hello")?;

    Ok(())
}

Transactions

use crabstash::{Db, Isolation};

fn main() -> crabstash::Result<()> {
    let db = Db::open("my_data")?;

    let txn = db.begin_with_isolation(Isolation::Serializable);
    txn.put("key1", "value1");
    txn.put("key2", "value2");
    txn.commit()?;

    Ok(())
}

Status

Work in progress.

License

MIT