Method and system for preemptive caching across content delivery networks
A method and system for preemptive caching across content delivery networks. Specifically, the disclosed method and system entail proactively seeding (or deploying) resources to edge nodes of a content delivery network based on prospective information sources such as, for example, travel itineraries, map route plans, calendar appointments, etc. Resource delivery deadlines and destinations may be derived from these prospective information sources in order to preemptively direct and cache resources near these resource delivery destinations (i.e., geo-locations) prior to or by the expected times (i.e., future point-in-times) during which a resource requestor and/or consumer is anticipated to be positioned at or within proximity to the resource delivery destinations. Through proactive seeding of resources, which may reflect content or service functionalities, reduced latency may be observed at least with respect to requesting the resources from the content delivery network.
1. A method for preemptively caching resources in a system that includes an origin node operatively connected to a plurality of edge nodes, wherein the origin node maintains a resource catalog configured to track resources available on the origin node, and an edge catalog containing a plurality of catalog entries pertaining the plurality of edge nodes, comprising:
receiving, by the origin node and from a first edge node of the plurality of edge nodes, a first preemptive caching request comprising a first resource retrieval object, a first resource delivery deadline, and a first resource delivery destination, wherein the first resource delivery deadline and the first resource delivery destination are derived from prospective information for a user obtained from a portable end device, wherein the prospective information comprises at least one of a map route plan, travel itineraries and calendar appointments;
performing a first lookup on the resource catalog using at least a portion of the first resource retrieval object to identify a first resource catalog entry for a first resource, wherein the first resource catalog entry specifies minimum capability requirements needed to cache the first resource;
performing a second lookup on the edge catalog on the origin node using the first resource delivery destination to identify an edge catalog entry for a second edge node;
retrieving, using the edge catalog entry, a cached resource record for the second edge node from the origin node;
making a first determination, using the cached resource record, that the first resource is not cached on the second edge node;
in response to the first determination, obtaining, using the cached resource record, an on-site capability record for the second edge node from the origin node;
making a second determination, based on the on-site capability record, that the second edge node comprises edge resources satisfying the minimum capability requirements for the first resource;
in response to the second determination, generating a resource transfer object, wherein generating the resource transfer object comprises:
obtaining the first resource,
making a third determination to apply additional processing to the first resource to generate a processed first resource, wherein the third determination is made based on an amount of time required to apply the additional processing and the first resource delivery deadline, wherein the additional processing is at least one of compression or deduplication, and
generating the resource transfer object using the processed first resource; and
deploying the resource transfer object, to preemptively cache, the first resource onto the second edge node prior to the first resource delivery deadline, wherein the second edge node is located within a proximity threshold of an expected geo-location during the first resource delivery deadline, wherein the expected geo-location is on the map route plan, wherein the portable end device is not located at the expected geo-location when the origin node receives the first preemptive caching request, and wherein the portable end device follows the map route plan to the expected geo-location,
wherein the first resource retrieval object comprises a service identifier associated with a service providing at least the first resource, and a resource identifier associated with the first resource,
wherein at least the portion of the first resource retrieval object used to identify the first resource comprises the resource identifier,
wherein the user uses the portable end device to access the first resource via the second edge node at the expected geo-location.
2. The method of claim 1 , wherein the first resource retrieval object further comprises a user identifier associated with the user, and user access credentials for authenticating the user.
3. The method of claim 1 , wherein the first resource delivery deadline reflects a timestamp encoding a future point-in-time.
4. The method of claim 1 , wherein the first resource comprises one selected from a group consisting of content and a service functionality.
5. The method of claim 1 , wherein the second lookup further identifies a third edge node, wherein the first resource is further deployed onto the third edge node to preemptively cache the first resource thereon prior to the first resource delivery deadline.
6. The method of claim 1 , further comprising:
receiving, from the first edge node, a second preemptive caching request comprising a second resource retrieval object, the first resource delivery deadline, and the first resource delivery destination;
performing a third lookup on the resource catalog using at least a portion of the second resource retrieval object to identify a second resource; and
deploying, to preemptively cache, the second resource onto the second edge node prior to the first resource delivery deadline.
7. The method of claim 1 , further comprising:
receiving, from the first edge node, a second preemptive caching request comprising a second resource retrieval object, a second resource delivery deadline, and a second resource delivery destination;
performing a third lookup on the resource catalog using at least a portion of the second resource retrieval object to identify a second resource;
performing a fourth lookup on the edge catalog using the second resource delivery destination to identify one selected from a group consisting of the second edge node and a third edge node; and
deploying, to preemptively cache, the second resource onto one selected from the group consisting of the second edge node and the third edge node prior to the second resource delivery deadline.
8. A non-transitory computer-readable medium (CRM) comprising computer readable program code for preemptively caching resources in a system that includes an origin node operatively connected to a plurality of edge nodes, wherein the origin node maintains a resource catalog configured to track resources available on the origin node, and an edge catalog containing a plurality of catalog entries pertaining the plurality of edge nodes, which when executed by a computer processor, enables the computer processor to:
receive, by the origin node and from a first edge node of the plurality of nodes, a first preemptive caching request comprising a first resource retrieval object, a first resource delivery deadline, and a first resource delivery destination, wherein the first resource delivery deadline and the first resource delivery destination are derived from prospective information for a user obtained from a portable end device, wherein the prospective information comprises at least one of a map route plan, travel itineraries and calendar appointments;
perform a first lookup on the resource catalog using at least a portion of the first resource retrieval object to identify a first resource catalog entry for a first resource, wherein the first resource catalog entry specifies minimum capability requirements needed to cache the first resource;
perform a second lookup on the edge catalog on the origin node using the first resource delivery destination to identify an edge catalog entry for a second edge node;
retrieve, using the edge catalog entry, a cached resource record for the second edge node from the origin node;
make a first determination, using the cached resource record, that the first resource is not cached on the second edge node;
in response to the first determination, obtain, using the cached resource record, an on-site capability record for the second edge node from the origin node;
make a second determination, based on the on-site capability record, that the second edge node comprises edge resources satisfying the minimum capability requirements for the first resource;
in response to the second determination, generate a resource transfer object, wherein generating the resource transfer object comprises:
obtaining the first resource,
making a third determination to apply additional processing to the first resource to generate a processed first resource, wherein the third determination is made based on an amount of time required to apply the additional processing and the first resource delivery deadline, wherein the additional processing is at least one of compression or deduplication, and
generating the resource transfer object using the processed first resource; and
deploy the resource transfer object, to preemptively cache, the first resource onto the second edge node prior to the first resource delivery deadline, wherein the second edge node is located within a proximity threshold of an expected geo-location during the first resource delivery deadline, wherein the expected geo-location is on the map route plan, wherein the portable end device is not located at the expected geo-location when the origin node receives the first preemptive caching request, and wherein the portable end device follows the map route plan to the expected geo-location,
wherein the first resource retrieval object comprises a service identifier associated with a service providing at least the first resource, and a resource identifier associated with the first resource,
wherein at least the portion of the first resource retrieval object used to identify the first resource comprises the resource identifier,
wherein the user uses the portable end device to access the first resource via the second edge node at the expected geo-location.
9. The non-transitory CRM of claim 8 , wherein the first resource retrieval object further comprises a user identifier associated with the user, and user access credentials for authenticating the user.
10. The non-transitory CRM of claim 8 , wherein the first resource delivery deadline reflects a timestamp encoding a future point-in-time.
11. The non-transitory CRM of claim 8 , wherein the first resource comprises one selected from a group consisting of content and a service functionality.
12. The non-transitory CRM of claim 8 , wherein the second lookup further identifies a third edge node, wherein the first resource is further deployed onto the third edge node to preemptively cache the first resource thereon prior to the first resource delivery deadline.