Evaluating The Performance of ANGEL Flow Meter

This technical report gives detail on the results obtained from evaluating the ANGEL Flow Meter (FM) performance. Evaluation metrics include packet loss, CPU and memory usage and the robust of the hash algorithm employed. It has been shown that the FM’s suffered packet loss (more than 10%) when coping with approximately more than 30,000 packets per second and 30,000 flows per second. There has been a small number of collisions found for the hash generating mechanism when dealing with millions of flows coming from a small range of source IP addresses (∼ 0.015% per 1million unique flows which is considered to be acceptable for the deployment of the hash algorithm in the FM architecture). We also tested the underlying redundancy system with the deployment of CARP protocol. Test results showed a handover time of ∼ 3 seconds in case of master FM power failure.