spacejam/sled

Health v2 · maintenance only

Adoption not part of the score

9079 stars · 429 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

sled is a lightweight, high-performance embedded key-value database written in pure Rust, offering a threadsafe BTreeMap-like API with ACID transactions, atomic operations, and crash-safe persistence. It is log-structured, lock-free, and flash-optimized, designed to be embedded directly into applications without a separate database server.

Use cases

• embed a key-value store in a Rust application without running a separate database server
• store persistent key-value data with ACID transactions
• perform atomic compare-and-swap operations on keys
• generate crash-safe monotonic IDs at high throughput
• subscribe to changes on key prefixes for reactive updates
• replace SQLite or RocksDB for simple embedded storage workloads
• run range queries and iterators over sorted key spaces

When to choose

• you need an embedded, serverless key-value store in a Rust project
• you want ACID transactions and crash safety without operational overhead
• you need high-performance concurrent access with a simple BTreeMap-like API
• you want zero-copy reads and flash-optimized storage

When to avoid

• you need a mature, battle-tested database for critical production data (the project is in an in-progress rewrite with alpha releases)
• you need a client-server database or SQL queries
• you need rich secondary indexes or a full query language
• your team is not working in Rust

Facets

library · maturity experimental

database caching serialization databases developer-tools backend rust cross-platform embedded-database kv-store b-tree log-structured lock-free acid-transactions crash-safe persistence

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