Large File Optimization Advanced

The Large File Optimization feature improves performance and reliability when delivering large files. This behavior is required for objects larger than 1.8GB, and recommended for anything over 100MB. You should apply it only to the specific content to be optimized, such as a download directory’s .gz files. It is best to use NetStorage for objects larger than 1.8GB.

This advanced behavior provides additional HTTP/2 options not present in the Large File Optimization behavior.

Features and options


What it does



Enables or disables this behavior.

POC Object size

Specifies the size of the file at which point to apply partial object (POC) caching. Append a numeric value with a MB or GB suffix.

POC Fragment size

Specifies the size of each fragment used for partial object caching.


  • 512 KB
  • 1 MB
  • 2 MB
  • 4 MB

POC Fragments to Prefetch during request

The number of POC fragments to prefetch during the request.

POC Fragments to Prefetch after request

The number of POC fragments to prefetch after the request.

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