Supercharging planetlab

Abstract

In recent years, overlay networks have become an important vehicle for delivering Internet applications. Overlay network nodes are typically implemented using general purpose servers or clusters. We investigate the performance benefits of more integrated architectures, combining general-purpose servers with high performance Network Processor (NP) subsystems. We focus on PlanetLab as our experimental context and report on the design and evaluation of an experimental PlanetLab platform capable of much higher levels of performance than typical system configurations. To make it easier for users to port applications, the system supports a fast path/slow path application structure that facilitates the mapping of the most performance-critical parts of an application onto an NP subsystem, while allowing the more complex control and exception-handling to be implemented within the programmer-friendly environment provided by conventional servers. We report on implementations of two sample applications, an IPv4 router, and a forwarding application for the Internet Indirection Infrastructure. We demonstrate an 80x improvement in packet processing rates and comparable reductions in latency.

RouteBricks

“…Several efforts have sought to reconcile performance and programmability using network processors (NPs) [45]. Most recently, Turner et al proposed a "supercharged" Planetlab Platform, which uses IXP NPs (for the data plane) and general-purpose servers (for the control plane), interconnected by an Ethernet switch; they achieve forwarding rates of 5Gbps for 130B packets [46]. We focus, instead, on using general-purpose servers even on the data plane, and our results indicate these offer competitive performance.…”