Hey, I've been working on a graph db-like thing as a hobby project for the last six months and I'm using LMDB as backend. I tried many alternatives (LevelDB, Sqlite4's LSM, BDB etc.) before settling on LMDB. The alternatives all had some quirk that stopped me from using them.

Among other things, I like that LMDB has zero-copy reads and that's something I've taken care to preserve all the way through my layers.

Just wanted to say thanks for the great work. LMDB is a joy to work with.