RocksDB is a key / value database created by facebook and works very well, but it lacks documentation on how to install the production version.
The code below works fine on Ubuntu 16.04 and was placed here to help
git clone https://github.com/facebook/rocksdb.git
cd rocksdb
DEBUG_LEVEL=0 make shared_lib install-shared
export LD_LIBRARY_PATH=/usr/local/lib
Hope this helps.
Kemper