Analysis

Pros

• Accurate load info

• Accurate proximity info

• Perfect solution… in some cases and if certain conditions are met

Cons

• DNS – wrong target

• Proximity between client and its LDNS

• Caching

  • LB
  • LDNS
  • Application

• Complexity

• Hard to find optimal values for various timers (TTL, cache timeouts, etc.) and prefix lengths

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