And the survey says . . .

• Duplication is good at high skews, but bad at low skews

• At low skews (uniform access frequency):

  • Duplicate elimination has good global memroy utilization.

• At high skews (zipf over 1)

  • Client-Server keeps hot pages at all nodes in memory
  • duplication is good

• Hybrid nears the performance of the better choice in both scenarios.

• Varying database size, using diverse file sizes, and more nodes gave similar results.

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