Redis is an open source, advanced key-value store. It is often referred to as a data structure server since keys can contain strings, hashes, lists, sets and sorted sets.
F. Abel, J. Coi, N. Henze, A. Koesling, D. Krause, and D. Olmedilla. Proceedings of the 6th International Semantic Web Conference and
2nd Asian Semantic Web Conference (ISWC/ASWC2007), Busan, South Korea, volume 4825 of LNCS, page 1--14. Berlin, Heidelberg, Springer Verlag, (November 2007)
F. Abel, J. Coi, N. Henze, A. Koesling, D. Krause, and D. Olmedilla. Proceedings of the 6th International Semantic Web Conference and 2nd Asian Semantic Web Conference (ISWC/ASWC2007), Busan, South Korea, volume 4825 of LNCS, page 1--14. Berlin, Heidelberg, Springer Verlag, (November 2007)