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What is the CDN node cache expiration configuration?

Created on 2025-04-22 11:15:55
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CDN (Content Delivery Network) node cache expiration configuration refers to the settings that determine how long cached content remains on the CDN's edge servers before it is refreshed or removed. This configuration is crucial for optimizing content delivery performance and reducing load on origin servers.

Explanation:

  • Cache Duration: The period of time (usually measured in seconds) after which cached content expires.
  • TTL (Time to Live): Another term used to describe the cache duration.
  • Refresh Mechanism: Determines how the cache is updated, whether it's manual, automatic based on TTL, or triggered by specific events.

Example:

If a website sets a TTL of 3600 seconds (1 hour) for its static assets, these assets will be cached on the CDN nodes for 1 hour. After this period, if a request is made for the asset, the CDN node will check if there is a newer version available from the origin server. If not, it might serve the cached version again until the next refresh cycle.

Recommendation for Tencent Cloud:

For effective management of CDN cache expiration, Tencent Cloud offers the Tencent Cloud CDN service. It provides flexible configuration options for cache settings, allowing users to customize the TTL for different types of content. Additionally, Tencent Cloud CDN supports features like intelligent caching and real-time updates to further optimize content delivery efficiency.

By leveraging Tencent Cloud CDN, businesses can ensure that their content is delivered quickly and reliably to users worldwide, with minimal configuration overhead.