THE ADVANCED COMPUTING SYSTEMS ASSOCIATION The following paper was originally published in the Proceedings of the USENIX Annual Technical Conference Monterey, California, USA, June 6-11, 1999 NewsCache – A High Performance Cache Implementation for Usenet News _ _ _ Thomas Gschwind and Manfred Hauswirth Technische Universität Wien © 1999 by The USENIX Association All Rights Reserved Rights to individual papers remain with the author or the author's employer. Permission is granted for noncommercial reproduction of the work for educational or research purposes. This copyright notice must be included in the reproduced paper. USENIX acknowledges all trademarks herein. For more information about the USENIX Association: Phone: 1 510 528 8649 FAX: 1 510 548 5738 Email:
[email protected] WWW: http://www.usenix.org NewsCache – A High Performance Cache Implementation for Usenet News Thomas Gschwind Manfred Hauswirth g ftom,M.Hauswirth @infosys.tuwien.ac.at Distributed Systems Group Technische Universitat¨ Wien Argentinierstraße 8/E1841 A-1040 Wien, Austria, Europe Abstract and thus provided to its clients are defined by the news server’s administrator. Usenet News is reaching its limits as current traffic strains the available infrastructure. News data volume The world-wide set of cooperating news servers makes increases steadily and competition with other Internet up the distribution infrastructure of the News system. services has intensified. Consequently bandwidth re- Articles are distributed among news servers using the quirements are often beyond that provided by typical Network News Transfer Protocol (NNTP) which is de- links and the processing power needed exceeds a sin- fined in RFC977 [2]. In recent years several exten- gle system’s capabilities.