MDBM is a very fast memory-mapped key-value store with a simple interface and lots of features.
It was originally based on SDBM by Ozan Yigit, and enhanced by Larry McVoy et al (at SGI).
Yahoo! further enhanced it, where it has been in production use for over a decade, serving Terabytes of data.
4.10.012 Aug 2014 20:28
Yahoo! version recently released as Open Source (BSD).