Store NetFlow records in HBase, and process them by MapReduce.
Paper:
@inproceedings{taherimonfaredreal, title={Real-Time Handling of Network Monitoring Data Using a Data-Intensive Framework}, author={TaheriMonfared, Aryan and Wlodarczyk, Tomasz Wiktor and Rong, Chunming}, booktitle={Cloud Computing Technology and Science (CloudCom), 2013 IEEE Fifth International Conference on}, year={2013}, organization={IEEE} }