This reposity contains the implementation of the WAH compression algorithm using CUDA
Witold Andrzejewski, Robert Wrembel: "GPU-WAH: Applying GPUs to Compressing Bitmap Indexes with Word Aligned Hybrid", Proceedings of the 21st international conference on Database and expert systems applications: Part II, pp. 315–329, Springer-Verlag, Berlin, Heidelberg, 2010.
http://link.springer.com/content/pdf/10.1007/978-3-642-15251-1_26.pdf