- LMDB is a Btree-based embedded database management library with a simplified BerkeleyDB-like API.
- It uses memory-mapped files for direct data access, eliminating the need for malloc or memcpy during fetches, resulting in high performance and simplicity.
- The database is fully transactional with ACID semantics, thread-aware, and supports concurrent read/write access across multiple processes and threads.
- Data pages employ copy-on-write, preventing overwrites and ensuring corruption resistance without special recovery after system crashes.