Manage caches with precision using Amazon CloudFront Invalidation by Cache Tag

This article announces Amazon CloudFront's new Invalidation by Cache Tag feature, enabling developers to invalidate groups of related cached objects using tags instead of individual URLs.

• Invalidate multiple cached objects with single tag-based request regardless of URL structure
• Configure cache tags via HTTP response headers from origin (default: x-amz-meta-cache-tag)
• Supports S3 user-defined metadata or Lambda@Edge for adding cache tags to responses
• Create invalidations via AWS Console, CLI (prefix tags with #), or API
• Invalidations propagate globally in under 5 seconds at P95
• Ideal for CMS, ecommerce, compliance, and video streaming use cases
• Design tagging strategy using entity-based, category, or hierarchical tags
• Assign multiple tags per object for flexible, multi-dimensional invalidation control
• Tag values limited to 256 characters; only first 50 tags cached per object

CloudFront's cache tag invalidation simplifies content management by decoupling invalidation logic from URL structure, improving cache efficiency and reducing origin load.