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As part of our ongoing efforts to maximize the efficiency of the Open Connect content delivery network, we recently made some improvements to how content is placed on some of our Open Connect Appliance (OCA) servers. These changes are an efficiency enhancement to our heterogeneous cluster allocation (HCA) strategy, described in more detail in this tech blog.

This latest HCA enhancement is designed to increase the overall efficiency of our OCAs by shifting a portion of our more popular content onto the SSD drives within Storage OCAs, at sites that contain both Flash and Storage OCAs.

These changes were rolled out in batches to partner sites, starting October 19, 2020, and ending March 5, 2021

Due to these changes, you may notice some changes to previous fill behavior:

  • Flash-based OCAs now fill during the same time window as the Storage OCAs in the site. For more details, see: Fill patterns
  • Flash-based OCAs fill at a maximum speed of 300Mbps during their fill window
  • Most Flash-based OCAs can now serve and fill simultaneously (as Storage OCAs already did)
  • The total amount of nightly fill traffic remains under the maximum levels that are described in the Fill patterns article

If you have any issues, please open a ticket.

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