Mithril-mine/libmdbx

Health v2 · maintenance only

Adoption not part of the score

1451 stars · 151 forks observed · 2026-08-28

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

libmdbx is an extremely fast, compact, embedded transactional key-value storage engine with ACID transactions, MVCC, and memory-mapped B+tree storage. It is a deeply revised descendant of LMDB that surpasses it in reliability, capabilities, and performance, and is used in hundreds of open-source projects including Ethereum clients.

Use cases

• embed a fast transactional key-value database in my application
• replace LMDB with a more reliable and performant storage engine
• store blockchain node data with ACID guarantees
• share a database between multiple multi-threaded processes without a server
• get crash-safe local storage without WAL maintenance
• build a lightweight embedded database with minimal overhead
• run wait-free parallel readers alongside writers

When to choose

• you need an embedded, serverless key-value store with ACID transactions and MVCC
• read-heavy workloads need wait-free concurrent readers with minimal overhead
• you want no crash recovery or maintenance overhead
• you need cross-platform C/C++ embedding with just a few source files
• you are building blockchain or other high-reliability systems (e.g. Ethereum clients)

When to avoid

• write-intensive workloads with strict durability requirements, since there is no WAL
• you need a client-server database or network access
• you require SQL or rich query capabilities beyond key-value maps and multimaps
• your stack requires bindings or tooling outside the C/C++ ecosystem without extra work

Facets

library · maturity stable

database caching databases developer-tools performance windows cross-platform cpp c key-value-store embedded-database mvcc btree lmdb memory-mapped acid-transactions storage-engine linux macos android ios

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