An Introduction to DNS Traffic Management - Shopify
Aug 5, 2020
Summary
This post provides an overview of DNS and its role in traffic management, explaining concepts like TTL, negative TTL, and the hierarchical structure of DNS. It details four use cases for DNS traffic management: easy failover (active-passive), sharing traffic between endpoints (active-active), and progressively deploying changes. It also discusses the trade-offs between low TTL for accuracy and DNS resolution time for performance, and acknowledges that DNS traffic management is not instantaneous due to caching.
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