1. Twitter storm.
http://storm.apache.org/
2. Amagata, D., Hara, T., Nishio, S.: Sliding window top-k dominating query processing over distributed data streams. Distrib. Parallel Databases 34(4), 535–566 (2016).
http://dx.doi.org/10.1007/s10619-015-7187-9
3. Babcock, B., Olston, C.: Distributed top-k monitoring. In: Proceedings of the 2003 ACM SIGMOD International Conference on Management of Data, San Diego, California, USA, 9–12 June 2003, pp. 28–39 (2003).
http://doi.acm.org/10.1145/872757.872764
4. Bruno, N., Gravano, L., Marian, A.: Evaluating top-k queries over web-accessible databases. In: Proceedings of the 18th International Conference on Data Engineering, San Jose, CA, USA, 26 February–1 March 2002, pp. 369–380 (2002).
http://dx.doi.org/10.1109/ICDE.2002.994751
5. Cao, P., Wang, Z.: Efficient top-k query calculation in distributed networks. In: Proceedings of the Twenty-Third Annual ACM Symposium on Principles of Distributed Computing, PODC 2004, St. John’s, Newfoundland, Canada, 25–28 July 2004, pp. 206–215 (2004).
http://doi.acm.org/10.1145/1011767.1011798