Web%20Clients - PowerPoint PPT Presentation

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Web%20Clients

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Recency-based LRU. Frequency-based LFU-Aging. Size-based GD-Size. Workload Characteristics ... What percentage of the documents requested by the clients are ... – PowerPoint PPT presentation

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Title: Web%20Clients


1
Web Proxy Caching Model
Web Servers
Web Clients
2
Factors and Levels
  • Cache size
  • Cache Replacement Policy
  • Recency-based LRU
  • Frequency-based LFU-Aging
  • Size-based GD-Size
  • Workload Characteristics
  • One-timers, Zipf slope, tail index, correlation,
    temporal locality model

3
Performance Metrics
  • Document Hit Ratio (DHR)
  • What percentage of the documents requested by the
    clients are satisfied directly by the proxy,
    without having to obtain from the Web server?
  • Byte Hit Ratio (BHR)
  • What percentage of the bytes requested by the
    clients are satisfied directly by the proxy,
    without having to obtain from the Web server?
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