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Data purge distribution and coherency

  • US 10,530,883 B2
  • Filed: 03/26/2014
  • Issued: 01/07/2020
  • Est. Priority Date: 02/18/2014
  • Status: Active Grant
First Claim
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1. A method of operating a content delivery system to handle purge messages, the purge messages comprising requests to purge content cached by content delivery nodes in the content delivery system, the method comprising:

  • in the content delivery nodes, if the purge messages are received, purging content associated with the purge messages and compiling purge summaries which indicate the purge messages that are received;

    in the content delivery nodes, transferring the purge summaries for delivery to at least one other content delivery node in the content delivery nodes;

    in a first content delivery node, receiving a first purge summary transferred by a second content delivery node, and comparing the first purge summary to a second purge summary maintained by the first content delivery node to identify one or more missing purge messages that have not been implemented by the first content delivery node;

    in the first content delivery node, responsive to identifying the one or more missing purge messages, requesting purge details associated with the one or more missing purge messages from the second content delivery node and implementing the one or more missing purge messages once the purge details have been received; and

    in the first content delivery node, responsive to implementing the one or more missing purge messages, updating the second purge summary.

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