Design and Evaluation of a Proxy Cache for Peer-to-Peer Traffic

Abstract

Abstract-Peer-to-peer (P2P) systems generate a major fraction of the current Internet traffic, and they significantly increase the load on ISP networks and the cost of running and connecting customer networks (e.g., universities and companies) to the Internet. To mitigate these negative impacts, many previous works in the literature have proposed caching of P2P traffic, but very few (if any) have considered designing a caching system to actually do it. This paper demonstrates that caching P2P traffic is more complex than caching other Internet traffic, and it needs several new algorithms and storage systems. Then, the paper presents the design and evaluation of a complete, running, proxy cache for P2P traffic, called pCache. pCache transparently intercepts and serves traffic from different P2P systems. A new storage system is proposed and implemented in pCache. This storage system is optimized for storing P2P traffic, and it is shown to outperform other storage systems. In addition, a new algorithm to infer the information required to store and serve P2P traffic by the cache is proposed. Furthermore, extensive experiments to evaluate all aspects of pCache using actual implementation and real P2P traffic are presented.

Pushing uplink goodput of an asymmetric access network beyond its uplink bandwidth

“…We are also extending our work along several directions. For example, we believe the lessons learned from the ACL protocol can be applied to enhance techniques like online compression [17], protocol-independent redundancy elimination [3], WAN optimization [1], and caching [11].…”

“…Representative redundancy elimination algorithms include online compression algorithms [17], caching algorithms [11], protocol-independent redundancy elimination [3], and WAN optimization [1]. Different from the proposed ACL protocol, redundancy elimination algorithms may reduce the uplink traffic amount, but they cannot leverage on idling downlink bandwidth of asymmetric links for faster upload speed.…”

Replacement Mechanism of Caching Technique for Query Routing in Peer to Peer Networks

“…So as an extension to the previous works, we propose a caching mechanism which can reduce the delay and overhead to great extent. Hefeeda et al (2011) have proposed pCache method which is design and evaluation of a complete, running, proxy cache for P2P traffic. pCache transparently intercepts and serves traffic from different P2P systems.…”

Optimally designing caches to reduce P2P traffic

“…We summarize the operation of pCache whose detailed operation is publicly presented [12] as an example of caches working as peers. The caches are implemented at any router ports, and control packets requiring content delivery, i.e., Query packets, are detected by monitoring the packet stream at the cache-implemented ports.…”