This is a basic key-value database which uses a central controller script and multiple core database scripts to provide large (relatively speaking) amounts of LSL based data storage.
It is useful in situations where you need to manage a substantial amounts of data but can't or don't want to use an external database.
When it was developed (pre-mono), it could easily handle several tens of thousands entries and/or 1-2 MB of data. I haven't really pushed it in the mono environment, but i have had it store 50,000+ entries with out any problem.
https://wiki.secondlife.com/wiki/User:Ravenhurst_Xeno