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Lightning Memory-Mapped Database (LMDB) ist ein freies eingebettetes Datenbanksystem, das ursprünglich von Howard Chu für das OpenLDAP-Projekt entwickelt wurde. LMDB stellt dabei ähnlich wie DBM und Berkeley DB eine Schlüssel-Werte-Datenbank zur Verfügung. (de) Lightning Memory-Mapped Database (LMDB) is a software library that provides an embedded transactional database in the form of a key-value store. LMDB is written in C with 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 appending records (MDB_APPEND) without checking for consistency. LMDB is not a relational database, it is strictly a key-value store like Berkeley DB and dbm. LMDB may also be used in a multi-threaded or multi-processing environment, with read performance scaling linearly by design. LMDB databases may have only one writer at a time, however unlike many similar key-value databases, write transactions do not block readers, nor do readers block writers. LMDB is also unusual in that multiple applications on the same system may simultaneously open and use the same LMDB store, as a means to scale up performance. Also, LMDB does not require a transaction log (thereby increasing write performance by not needing to write data twice) because it maintains data integrity inherently by design. (en) |
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Howard Chu (en) |
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Symas (en) |
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dbr:Embedded_database |
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OpenLDAP Public License (en) |
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OpenLDAP Lightning Memory-Mapped Database (en) |
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Lightning Memory-Mapped Database (LMDB) ist ein freies eingebettetes Datenbanksystem, das ursprünglich von Howard Chu für das OpenLDAP-Projekt entwickelt wurde. LMDB stellt dabei ähnlich wie DBM und Berkeley DB eine Schlüssel-Werte-Datenbank zur Verfügung. (de) Lightning Memory-Mapped Database (LMDB) is a software library that provides an embedded transactional database in the form of a key-value store. LMDB is written in C with 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 appending records (MDB_APPEND) without checking for consistency. LMDB is not a relational database, it is strictly a key-value store like Berkeley DB and dbm. (en) |
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Lightning Memory-Mapped Database (de) Lightning Memory-Mapped Database (en) |
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