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Optimize delivery of large files
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Optimize delivery of large files

The option cannot be used if compression on CDN servers or compression at source is enabled for the resource.

The option speeds up caching of large files.

Principle of operation⁠

All files larger than 10 MB are downloaded from the source to the CDN server cache in 10 MB chunks. For example, a 56 MB video will be split into six parts: five 10 MB parts and the last part is the remaining 6 MB. If the user watches only half of the video, the CDN server will request only the first three parts from the source.

If you have updated the file and optimization is enabled for the resource — clear the cache so that users receive the current version.

Enable optimization of large file delivery⁠

  1. Ensure that requests with the Range HTTP header are supported on the source.
  2. In the Control Panel, on the top menu, click Products and select CDN.
  3. Open the CDN resource page → Settings tab.
  4. Open the Content card.
  5. Check the Optimize delivery of large files checkbox.
  6. Click Save. The optimization will work within 30 minutes.