LMDB icon
LMDB icon

LMDB

 Like

An ultra-fast, ultra-compact, crash-proof key-value embedded data store.

License model

  • FreeOpen Source

Country of Origin

  • US flagUnited States

Platforms

  • Mac
  • Windows
  • Linux
  No rating
0likes
0comments
0news articles

Features

Suggest and vote on features
  1.  Embeddable

 Tags

LMDB News & Activities

Highlights All activities

Recent activities

  • App icon
    nuuvil added LMDB as alternative to RocksDB
    about 2 months ago
Show all activities

LMDB information

  • Developed by

    US flagSymas
  • Licensing

    Open Source and Free product.
  • Written in

  • Alternatives

    12 alternatives listed
  • Supported Languages

    • English

GitHub repository

  •  2,702 Stars
  •  597 Forks
  •  0 Open Issues
  •   Updated Apr 7, 2025 
View on GitHub

Popular alternatives

View all

Our users have written 0 comments and reviews about LMDB, and it has gotten 0 likes

LMDB was added to AlternativeTo by filiphanes on Dec 3, 2020 and this page was last updated Dec 10, 2020.
No comments or reviews, maybe you want to be first?
Post comment/review

What is LMDB?

An ultra-fast, ultra-compact, crash-proof key-value embedded data store.

Symas LMDB is an extraordinarily fast, memory-efficient database we developed for the OpenLDAP Project. With memory-mapped files, it has the read performance of a pure in-memory database while retaining the persistence of standard disk-based databases. Bottom line, with only 32KB of object code, LMDB may seem tiny. But it’s the right 32KB. Compact and efficient are two sides of a coin; that’s part of what makes LMDB so powerful. Explore Capabilities

Ordered-map interface keys are always sorted; range lookups are supported Fully-transactional full ACID semantics with MVCC Reader/writer transactions readers don’t block writers; writers don’t block readers Fully serialized writers writes are always deadlock-free Extremely cheap read transactions can be performed using no mallocs or any other blocking calls Multi-thread and multi-process concurrency supported Environments may be opened by multiple processes on the same host Multiple sub-databases may be created transactions cover all sub-databases Memory-mapped allows for zero-copy lookup and iteration Maintenance-free no external process or background cleanup or compaction required Crash-proof no logs or crash recovery procedures required No application-level caching LMDB fully exploits the operating system’s buffer cache 32KB of object code and 6KLOC of C fits in CPU L1 cache for maximum performance

Official Links