lmdb/lmdb is a read-only mirror of the official LMDB repository on openldap.org. Issues and pull requests submitted to this GitHub repository are ignored, and issues must be sent to OpenLDAP ITS, the project's own issue tracking system. The repository was created on April 22, 2015, and there is no published information about the latest release.
LMDB is a key-value storage library based on Berkeley DB technology. Its memory-mapped design maps data into the memory address space, making it an embedded transactional engine that embeds a persistent store inside a process through the environment, DB and transaction APIs. It runs in the same process as the application, with no separate server. It provides bindings for several languages, and the repository contains the C implementation together with documentation and per-language integration material. The project language is listed as C and it has 3055 stars.
Still, this GitHub repository is not a development window. Actual development and releases take place in the official repository on openldap.org, so the change history and issues should be followed there and in OpenLDAP ITS. How often the mirror is updated is not given in the available material, and no license is stated either. The only score left in the research record is a momentum of 1.7 (out of 10); no novelty, technology or quality scores are given. The newest version cannot be confirmed from this repository. It is better understood as reference material pointing to the current state of the official repository than as a development site.