Enhancing ICP with Summary Cache

• Prototype implemented in Squid 1.1.14

• Repeating the 4-proxy experiments, the new ICP:

  • Reduces UDP messages by a factor of 12 to 50 compared with the old ICP
  • Little increase in network packets over no cache sharing
  • increase CPU time by 2 - 7%
  • reduce user latency up to 4% with remote cache hits

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