We present the design, implementation, and evaluation of AMPS---a flexible, scalable proxy testbed designed to support a wide and extensible set of next-generation proxy streaming services. AMPS employs a modular architecture and is built using commodity hardware. We quantify the maximum achievable throughput for the two componenets of the proxy- the control plane and data plane, and identify the CPU to be the system bottleneck. Through profiling studies, we further identify the kernel networking protocol and the Network Reception Module inside the proxy to be the most CPU-intensive componenets. We also characterize the end-end performance along the server-to-proxy-to-client path. We discuss lessons learned and the various optimizations made in the course of our study to improve system performance. 1
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