Arista Networks 
Arista also introduced Latency Analyzer (LANZ), a new software capability to monitor and analyze network performance, generate early warning of pending congestion events, and track sources of bottlenecks. In addition, a Solid State Disk (SSD) is available as a factory-option and can be used to store packet data captures, LANZ generated historical data, and take full advantage of the Linux based Arista Extensible Operating System (EOS).
http://www.aristanetworks.com