Resource management techniques, such as cache optimization, are employed to organize resources within caches such that the most requested content (e.g., the most popular content) is more readily available. A service provider utilizes content expiration data as indicative of resource popularity. As resources are requested, the resources propagate through a cache server hierarchy associated with the service provider. More frequently requested resources are maintained at edge cache servers based on shorter expiration data that is reset with each repeated request. Less frequently requested resources are maintained at higher levels of a cache server hierarchy based on longer expiration data associated with cache servers higher on the hierarchy.

Managing resources using resource expiration data

A system, method and computer-readable medium for client-side processing of resource identifiers. A client request for content is returned that includes information for generating a request for translation information and a number of embedded resource identifiers. Based on the information for generating a request for translation information, the client generates and obtains translation information and processes the embedded resource identifiers to obtain resources from a service provider.

Network resource identification

Systems and method for the management and processing of resource requests by a service provider, such as a content delivery network (“CDN”) service provider, on behalf of a content provider are provided. The CDN service provider can measure the performance associated with the delivery of resources to a requesting client computing devices from various computing devices associated with the CDN service provider. In one embodiment, a client computing device can execute code, such as scripts, that cause the client computing device to transmit requests to different computing devices associated with the CDN service provider's domain. Information associated with the processing of the responses can be used to measure CDN service provider latencies.

Latency measurement in resource requests

A system, method, and computer readable medium for managing secure content by CDN service providers are provided. A network storage provider stores one or more resources on behalf of a content provider. A CDN service provider obtains client computing device requests for secure content. Based on processing first signature information, the CDN service provider determines whether the secure content is available to the client computing device. If the CDN service provider does not maintain the requested content, the CDN service provider transmits a request to the network storage provider. Based on second signature information and an identifier associated with the CDN service provider, the network storage provider processes the request based policy information associated with the identifier.

Managing secure content in a content delivery network

Systems, methods, and computer-readable media provide content items to clients. In one implementation, a system stores data identifying a plurality of cache servers, the cache servers storing the content items for download by a plurality of clients. The system receives a request from a first one of the clients to download one of the content items. The system selects one or more of the cache servers for providing the requested content item to the first client. The system transmits identifiers of the selected one or more cache servers to the first client, and transmits instructions to the first client. The instructions are operable, when executed by the first client, to determine whether the selected one or more cache servers have a local copy of the requested content item. When the first client determines that a first one of the selected one or more cache servers has a local copy of the requested content item, the first client downloads the requested content item from the first selected cache server.

Content distribution network

The recently-standardized Precision Time Protocol
v2 (PTPv2) aims at achieving sub-microsecond-level synchronization
between network clocks. In this work, we make the case
for an alternative use of it: Adopting a learning approach, we
observe its delay behavior during the protocol message exchange,
derive models of its dependence on network load and build a realtime
load estimation service. Then, as an application scenario of
this service, we turn our attention to the provision of Over-the-
Top (OTT) services. In such an environment, and assuming a
level of cooperation between the ISP and the OTT provider,
we demonstrate how our service can be used for estimating
user experience for web applications. To this end, we establish
quantitatively the link between network load and user experience
using a state-of-the-art web QoE monitoring framework, and
show how our PTPv2-based load estimation scheme can be
integrated in an OTT service architecture and be utilized for
load-aware, QoE-optimized content delivery decisions

/pdf/ptpv2-based-network-load-estimation-and-its-application-to-3fpf9l77fq.pdf

Thierry Etame

Papers

PTPv2-based network load estimation and its application to QoE monitoring for Over-the-Top services