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Lightning Memory-Mapped Database

Lightning Memory-Mapped Database (LMDB) is an embedded transactional database in the form of a key-value store. LMDB is written in C with API bindings for several programming languages. LMDB stores arbitrary key/data pairs as byte arrays, has a range-based search capability, supports multiple data items for a single key and has a special mode for…

History & Applications

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Application support

Free softwareUbuntuFedoraOpenSuSEPostfix
13 related topics

Technical description

B+ treeAPIShared memoryCopy-on-writeSingle-level store
12 related topics

History

OpenLDAPOperating systemForkOpenBSD
4 related topics

Performance

LevelDBSQLiteKyoto CabinetJFSBtrfs
6 related topics

Key facts & relationships

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Developer
Symas
License
OpenLDAP Public License (permissive software license)
Operating system
Unix, Linux, Windows, AIX, Sun Solaris, SCO Unix, macOS, iOS
Original author
Howard Chu
Release
November 24, 2011; 14 years ago (2011-11-24)
Repository
git.openldap.org/openldap/openldap/

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Overview

History

Technical description

Performance

Reliability

Open source license

API and uses

Application support

Advanced semantic analysis

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Map overview Semantic statistics

Lightning Memory-Mapped Database

Nodes60
Edges59
Triples15
Avg. degree1.97
Density0.033333
Components1

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Lightning Memory-Mapped Database

Top relations

Developer · 1
Lightning Memory-Mapped Database → Symas
License · 1
Lightning Memory-Mapped Database → OpenLDAP Public License (permissive software license)
Operating system · 1
Lightning Memory-Mapped Database → Unix, Linux, Windows, AIX, Sun Solaris, SCO Unix, macOS, iOS
Original author · 1
Lightning Memory-Mapped Database → Howard Chu
Release · 1
Lightning Memory-Mapped Database → November 24, 2011; 14 years ago (2011-11-24)
Repository · 1
Lightning Memory-Mapped Database → git.openldap.org/openldap/openldap/
Size · 1
Lightning Memory-Mapped Database → 64 KB
Stable release · 1
Lightning Memory-Mapped Database → 1.0.1 / 7 August 2026; 17 days ago (7 August 2026)
Type · 1
Lightning Memory-Mapped Database → Embedded database
Website · 1
Lightning Memory-Mapped Database → symas.com/lmdb

Important terminology Word statistics

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Important terminology

lmdb performance database data store openldap also db use write may berkeley multiple system memory transaction design key-value api open

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
Lightning Memory-Mapped DatabaseDeveloperSymas1.00infobox
Lightning Memory-Mapped DatabaseLicenseOpenLDAP Public License (permissive software license)1.00infobox
Lightning Memory-Mapped DatabaseOperating systemUnix, Linux, Windows, AIX, Sun Solaris, SCO Unix, macOS, iOS1.00infobox
Lightning Memory-Mapped DatabaseOriginal authorHoward Chu1.00infobox
Lightning Memory-Mapped DatabaseReleaseNovember 24, 2011; 14 years ago (2011-11-24)1.00infobox
Lightning Memory-Mapped DatabaseRepositorygit.openldap.org/openldap/openldap/1.00infobox
Lightning Memory-Mapped DatabaseSize64 KB1.00infobox
Lightning Memory-Mapped DatabaseStable release1.0.1 / 7 August 2026; 17 days ago (7 August 2026)1.00infobox
Lightning Memory-Mapped DatabaseTypeEmbedded database1.00infobox
Lightning Memory-Mapped DatabaseWebsitesymas.com/lmdb1.00infobox
Lightning Memory-Mapped DatabaseWritten inC1.00infobox
Debian to completely phase out their use of Berkeley DBinstance ofwhich would make a similar move like Oracle's impossible.The Berkeley DB license issue has caused major Linux distributions0.80text

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