Efficient processing of purge requests in content delivery network

A method for processing a purge request, comprising:

• receiving the purge request;
• tracking an availability state for each content distribution node in a group of content distribution nodes;
• generating, based on the purge request, one or more purge instructions for one or more available state content distribution nodes of the group;
• queuing, based on the purge request, one or more delayed purge instructions for one or more unavailable state content distribution nodes of the group;
• determining that the one or more available state content distribution nodes of the group have completed processing the one or more purge instructions generated for the one or more available state content distribution nodes;
• using a processor to confirm, based at least in part on the queuing of the one or more delayed purge instructions for the one or more unavailable state nodes, that the purge request has been completed, wherein the confirming that the purge request has been completed is before the one or more unavailable state nodes have completed processing the one or more delayed purge instructions, wherein the confirming that the purge request has been completed is based at least in part on a verification that one or more transitional state content distribution nodes of the group have completed processing one or more purge instructions generated based on the purge request;
• determine that a specific one of the one or more unavailable state content distribution nodes has requested a next content purge instruction from its purge instruction queue and a time value associated with the next purge instruction is chronologically after a threshold time;
• and
• transition the specific one unavailable state content distribution node to become a transitional state content distribution node, wherein the threshold time is a dynamic value determined by subtracting a predetermined amount of time period from a current time.

A computer program product for processing a purge request, the computer program product being embodied in a tangible non-transitory computer readable storage medium and comprising computer instructions for:

• receiving the purge request;
• tracking an availability state for each content distribution node in a group of content distribution nodes;
• generating, based on the purge request, one or more purge instructions for one or more available state content distribution nodes of the group;
• queuing, based on the purge request, one or more delayed purge instructions for one or more unavailable state content distribution nodes of the group;
• determining that the one or more available state content distribution nodes of the group have completed processing the one or more purge instructions generated for the one or more available state content distribution nodes;
• confirming, based at least in part on the queuing of the one or more delayed purge instructions for the one or more unavailable state nodes, that the purge request has been completed, wherein the confirming that the purge request has been completed is before the one or more unavailable state nodes have completed processing the one or more delayed purge instructions, wherein the confirming that the purge request has been completed is based at least in part on a verification that one or more transitional state content distribution nodes of the group have completed processing one or more purge instructions generated based on the purge request;
• determine that a specific one of the one or more unavailable state content distribution nodes has requested a next content purge instruction from its purge instruction queue and a time value associated with the next purge instruction is chronologically after a threshold time;
• and
• transition the specific one unavailable state content distribution node to become a transitional state content distribution node, wherein the threshold time is a dynamic value determined by subtracting a predetermined amount of time period from a current time.