MUPD8

https://github.com/walmartlabs/mupd8

MUPD8 implements the MapUpdate framework, a MapReduce-style framework for processing fast/streaming data developed by Walmart Labs.

Wang Lam, Lu Liu, STS Prasad, Anand Rajaraman, Zoheb Vacheri, and AnHai Doan. Muppet: MapReduce-Style Processing of Fast Data. PVLDB 5(12):1814-1825, 2012. (available as http://vldb.org/pvldb/vol5/p1814_wanglam_vldb2012.pdf)