Cache Architecture

The original architectural documents for Traffic Server were lost in the transition to an open source project. The documents in this section are provisional and were written based on the existing code. The purpose is to have a high level description of aspects of Traffic Server to better inform ongoing work.

In the final section on “hacking” we try to document our approaches to understanding and modifying the source.

• Cache Architecture
  • Introduction
  • Cache Layout
• Cache Initialization
  • Stripe Assignment
• Core Cache
  • Core Cache Constants
  • Core Cache Types
  • Core Cache Functions
• Data Structures
• API functions
  • Cache Internals
• Topics to be done
• Cache Consistency
• Volume Tagging
  • Version Upgrade
  • Controlling the cache key
• RAM Cache
  • New RAM Cache Algorithm (CLFUS)
  • Seen Hash
  • Cached List
  • History List
  • Compression and Decompression
• Cache Tool
  • Internals
• Tiered Storage
  • Configuration
  • Operations
  • Copying
  • Additional Notes