LMDB/lmdb

Health v2 · maintenance only

Flags: no_releases no_license no_readme

Adoption not part of the score

3055 stars · 646 forks observed · 2026-10-21

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

LMDB (Lightning Memory-Mapped Database) is a compact, high-performance embedded key-value database library written in C, using memory-mapped files for fast reads with full ACID transactional guarantees. This GitHub repository is a read-only mirror of the official source hosted on openldap.org, where development and issue tracking actually occur.

Use cases

• embed an ACID key-value store in a C/C++ application
• fast read-heavy key-value storage with memory-mapped files
• store metadata for a mail server or directory service
• replace SQLite or BDB for a low-latency embedded database
• use a transactional key-value store from Python or Go bindings
• build a cache with crash-safe persistence

When to choose

• you need an embedded, zero-configuration key-value database with very fast reads
• you need ACID transactions and crash resilience without running a database server
• multiple processes need concurrent read access to the same data
• you want a tiny, dependency-free C library

When to avoid

• you need a client-server database or SQL queries
• you need rich secondary indexes or document/relational features
• write-heavy workloads with large values, since LMDB favors read performance
• you expect to file issues or PRs on this mirror, which is ignored

Facets

library · maturity stable

database caching file-system databases developer-tools performance windows cross-platform c key-value-store memory-mapped embedded-database lmdb openldap read-only-mirror linux macos

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