A case for delay-conscious caching of Web documents

Peter Scheuermann*, Junho Shim, Radek Vingralek

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

54 Scopus citations


Caching at proxy servers plays an important role in reducing the latency of the user response, the network delays and the load on Web servers. The cache performance depends critically on the design of the cache replacement algorithm. Unfortunately, most cache replacement algorithms ignore the Web's scale. In this paper we argue for the design of delay-conscious cache replacement algorithms which explicitly consider the Web's scale by preferentially caching documents which require a long time to fetch to the cache. We present a new, delay-conscious cache replacement algorithm LNC-R-W3 which maximizes a performance metric called delay-savings-ratio. Subsequently, we test the performance of LNC-R-W3 experimentally and compare it with the performance of other existing cache replacement algorithms, namely LRU and LRU-MIN.

Original languageEnglish (US)
Pages (from-to)997-1005
Number of pages9
JournalComputer Networks
Issue number8-13
StatePublished - 1997


  • Cache replacement
  • Client-server architecture
  • Proxy servers
  • Trace-driven simulation

ASJC Scopus subject areas

  • Computer Networks and Communications


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