Check out the new USENIX Web site.
USENIX, The Advanced Computing Systems Association

2007 USENIX Annual Technical Conference

Pp. 185–198 of the Proceedings

Supporting Practical Content-Addressable Caching with CZIP Compression

KyoungSoo Park and Sunghwan Ihm, Princeton University; Mic Bowman, Intel Research; Vivek S. Pai, Princeton University

Abstract

Content-based naming (CBN) enables content sharing across similar files by breaking files into positionindependent chunks and naming these chunks using hashes of their contents. While a number of research systems have recently used custom CBN approaches internally to good effect, there has not yet been any mechanism to use CBN in a general-purposeway. In this paper, we demonstrate a practical approach to applying CBN without requiring disruptive changes to end systems. We develop CZIP, a CBN compression scheme which reduces data sizes by eliminating redundant chunks, compresses chunks using existing schemes, and facilitates sharing within files, across files, and across machines by explicitly exposing CBN chunk hashes. CZIPaware caching systems can exploit the CBN information to reduce storage space, reduce bandwidth consumption, and increase performance, while content providers and middleboxes can selectively encode their most suitable content. We show that CZIP compares well to standalone compression schemes, that a CBN cache for CZIP is easily implemented, and that a CZIP-aware CDN produces significant benefits.
  • View the full text of this paper in HTML and PDF. Listen to the presentation and Q & A in MP3 format.
    Click here if you have forgotten your password Until June 2008, you will need your USENIX membership identification in order to access the full papers. The Proceedings are published as a collective work, © 2007 by the USENIX Association. All Rights Reserved. Rights to individual papers remain with the author or the author's employer. Permission is granted for the noncommercial reproduction of the complete work for educational or research purposes. USENIX acknowledges all trademarks within this paper.
To become a USENIX member, please see our Membership Information.

Last changed: 29 August 2007 ac