Open Caching

Overview

As the amount of online video increases, ISPs face a challenge—the burdening of their networks with a growing amount of Internet-sourced traffic such as online video. But what if the ISP could pull video content from local cache? In this working group, participating members focus on helping ISPs solve this traffic problem by establishing the underlying technical and functional requirements for implementing an in-network, open caching system.

Objectives

The Streaming Video Technology Alliance Open Caching Working Group has two objectives. First, to identify the critical components of a non-proprietary caching system; and second, to establish basic architectural guidelines for implementation of an open caching system.

Presentations

Below are presentations delivered during working group sessions. Click on the presentation name to open it (many files are for members only and will require authentication) and a presenter name to view their profile. Note: if a presenter’s profile is not public, it will redirect to their LinkedIn page.

5G, MEC, and Open Caching

  

Presented by Yoav Gressel

Carlsbad F2F: Open Caching WG Slides

  

Presented by Eric Klein

Certificate Delegation

  

Presented by Sanjay Mishra

HTTPS Delegation - IETF101 Hackathon Proposal

  

Presented by Sanjay Mishra

IETF Update for Open Caching

  

Presented by Sanjay Mishra

MEC and Open Caching (Results Analysis)

  

Presented by Yoav Gressel

Multicast Over LTE POC

  

Presented by Sanjay Mishra

OC POC with eMBMS

  

Presented by William Chow

OC WG @ SVA Labs

  

Presented by Yoav Gressel

Open Caching docs update - SVA Q1 2018

  

Presented by Ori Finkelman

Open Caching Manifest Rewrite Proposal

  

Presented by Ori Finkelman

Open Caching Network Performance Metrics

  

Presented by Sanjay Mishra

Open Caching Presentations (Philadelphia Face-to-Face 2019)

  

Presented by Eric Klein

Open Caching Redirect Testbed

  

Presented by Sanjay Mishra

Open Caching Relayed Token Authentication

  

Presented by Ori Finkelman

Open Caching security considerations - f2f meeting May 2018

  

Presented by Ori Finkelman

Open Caching Status Update

  

Presented by Sanjay Mishra

Open Caching Status update (Feb 2019)

  

Presented by Sanjay Mishra

Implementation Guidelines Testbed

  

Presented by Alfonso Siloniz

Presented by Guillaume Bichot

Capacity Insights Update

  

Presented by Andrew Ryan

Configuration Interface Update

  

Presented by Glenn Goldstein

Open Caching WG Session

  

Presented by Alan Arolovitch

Presented by Alfonso Siloniz

Presented by Andrew Ryan

Presented by Dan Newman

Presented by Glenn Goldstein

Presented by Guillaume Bichot

Presented by Pankaj Chaudhari

Presented by Yoav Gressel

Capacity Insight Interface General Update

  

Presented by Ben Rosenblum

Configuration Interface and CAT Discussion

  

Presented by Glenn Goldstein

Configuration Interface Breakout Session

  

Presented by Glenn Goldstein

Configuration Interface General Update

  

Presented by Glenn Goldstein

FCI.Metadata Breakout Presentation

  

Presented by Ben Rosenblum

Presented by Glenn Goldstein

Open Caching Working Group General Updates

  

Presented by Pankaj Chaudhari

Presented by Yoav Gressel

Logging Interface Breakout Session

  

Presented by Ben Rosenblum

Testbed and Implementation Guidelines Breakout Session

  

Presented by Alfonso Siloniz

Presented by Guillaume Bichot

Open Caching Working Group Updates on Standards - CMCD and CMSD

  

Presented by Pankaj Chaudhari

Open Caching Working Group Cpacity Insights Update

  

Presented by Andrew Ryan

Common Access Token Update

  

Presented by Pankaj Chaudhari

Open Caching Working Group Configuration Interface Update

  

Presented by Glenn Goldstein

Open Caching Working Group Logging Update

  

Presented by Ben Rosenblum

Open Caching Working Group Request Routing Interface Discussion

  

Presented by Guillaume Bichot

Open Caching Working Group Testbed Update

  

Presented by Alfonso Siloniz

Presented by Guillaume Bichot

Open Caching Working Group Versioning Discussion

  

Presented by Guillaume Bichot

Open Caching Working Group Session

  

Presented by Pankaj Chaudhari

Presented by Yoav Gressel

Open Caching Working Group Capacity Insights Update

  

Presented by Ben Rosenblum

Open Caching Working Group Configuration Interface Part 2i Secrets Metadata

  

Presented by Ben Rosenblum

Open Caching Working Group Configuration Interface General Update

  

Presented by Glenn Goldstein

Open Caching Working Group OC WG Configuration Interface Part 2f Edge Control Metadata

  

Presented by Alfonso Siloniz

Open Caching Working Group Implementation Guidelines Update

  

Presented by Alfonso Siloniz

Presented by Guillaume Bichot

Open Caching Working Group Logging Interface Update

  

Presented by Ben Rosenblum

Open Caching WG Session

  

Presented by Pankaj Chaudhari

Presented by Yoav Gressel

Open Caching Working Group IETF Update

  

Presented by Sanjay Mishra

Open Caching Working Group Named Footprints

  

Presented by Alan Arolovitch

Telefonica TV Roaming Open Caching Use Case

  

Presented by Alfonso Siloniz

Open Caching WG Configuration Interface Breakout Session

  

Presented by Glenn Goldstein

dCDN Capabilites Breakout Session

  

Presented by Rajeev RK

Experience with Open Caching - Verizon

  

Presented by Sanjay Mishra

Experience with Open Caching - Broadpeak

  

Presented by Guillaume Bichot

Open Caching WG IETF Update

  

Presented by Sanjay Mishra

Open Caching WG Logging Interface Breakout Session

  

Presented by Ben Rosenblum

Open Caching WG Named Footprints Breakout Session

  

Presented by Alan Arolovitch

Open Caching WG Testbed Breakout Session

  

Presented by Alfonso Siloniz

Presented by Guillaume Bichot

IETF CDNI Working Group Update

  

Presented by Sanjay Mishra

Client Redirection Challenges Presentation

  

Presented by Rob Colantuoni

Configuration Interface API Update

  

Presented by Glenn Goldstein

Open Caching WG Document Overview

  

Presented by Yoav Gressel

Home Storage Update

  

Presented by Dan Newman

Open Caching WG Roadmap Presentation

  

Presented by Eric Klein

Open Caching Implementation Guidelines and Testbed Update

  

Presented by Alfonso Siloniz

Presented by Guillaume Bichot

Capacity Insight API Update

  

Presented by Andrew Ryan

Request Routing by Manifest Rewrite

  

Presented by Ori Finkelman

Review of Open Caching Service Provisioning Specification

  

Presented by Alfonso Siloniz

SVA Lisbon API Review

  

Presented by Eric Klein

SVA Lisbon Capacity API status

  

Presented by Eric Klein

SVA OC WG - MEC Status Update

  

Presented by Yoav Gressel

SVA OC WG Docs and Activities

  

Presented by Yoav Gressel

Open Caching Working Group Updates

  

Presented by Yoav Gressel

Open Caching Working Group Logging Interface and Capacity Insights Update

  

Presented by Ben Rosenblum

Open Caching Working Group Configuration Interface Update

  

Presented by Ben Rosenblum

Presented by Glenn Goldstein

Open Caching Working Group Testbed Update

  

Presented by Alfonso Siloniz

Documents

Published

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SVTA1013: Optimizing Video Delivery With The Open Caching Network

Delivering a great video experience requires content to be served as close to the end-user as possible. In this whitepaper, we illustrate how network operators can implement Open Caching nodes at the edge of their network, while adhering to specifications created by the Open Caching Working Group of the Streaming Video Alliance. These nodes can mitigate delivery latency and provide an improved viewer experience when hosted by the ISP and connected to the CDN/Content Provider nodes outside of the operator network, to create an Open Caching Network.

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SVTA2000: Open Cache Solution Functional Requirements Document

Problem statement and functional requirements of an open caching solution deployed by service providers to be used by content providers and content delivery networks.

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SVTA2004: Open Cache Logging Requirements Specification

This document specifies requirements for Open Caching System (OCS) for Logging data to help track data acquisition and delivery of it to the end user. The information logging is critical for the Open Caching Nodes as well as the upstream CDN and the Content Provider (CP). Logging information helps OCS track key performance metrics such as, data acquisition, delivery success and failures, measuring of effective throughput, cache hits and for troubleshooting fault and performance degradation. The logging data provided to the CDN by the OCS is also used by CDNs for auditing, billing and SLA purposes. The information logging will also be used by Open Caching Nodes (making up an OCS) for ensuring its compliance of SLAs with CDNs and measuring and assuring Quality of Experience (QoE) for an end user.

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SVTA2005: Open Caching Logging Integration Functional Specification

This document describes the process of provisioning a Logging Integration between a CDN and an ISP in an Open Caching solution. That is the process of configuring how delivery logs are transferred from ISP to CDN. The requirements for logging in Open Caching Nodes are described in the “Open Caching Logging Requirements Specification” document. This document defines extensions to the “Footprint and Capabilities” interface and to the “Service Metadata” interface, to allow provisioning a Logging Integration.

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SVTA2006: Open Cache Request Routing Service Provisioning Interface Specification

This includes the functional specification of open-caching service provisioning interfaces enabling a CDN and an SP to exchange information to enable the delegation of CDN content requests to the SP Open Caching system.

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SVTA2007: Open Cache Request Routing Functional Specification

This document describes the high-level functional specification of open caching request routing and the required interfaces to enable request routing to be performed from an upstream CDN to an open cache system. This version has been updated to address the Manifest Rewrite routing scheme.

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SVTA2008: Open Caching Content Management Operations Specification

This document describes the functional specification of the Open Caching Content Management interface and the functionality requirements from the SP Open Caching system. This document discusses the interface between the SP Open Caching Controller and the CDN. The interface between the SP OCC and the cache nodes (OCNs) is beyond the scope of this document.

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SVTA2016: Open Caching Relayed Token Authentication

This document describes the functional specification of open-caching relayed-token-authentication mechanism. The focus is on generically supporting URI signing using this method. There are additional applications – like user Cookies, which are mentioned in this document without getting into the specifics. While multiple different CDNs, as well as CDNi, support Tokenization in alternative methods, the goal of this implementation is to support all of these different formats via the relay authentication mechanism.

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SVTA2018: Open Caching Performance Measurement Specification

This document outlines measurement metrics for open-caching. The focus of this document is to outline key performance indicators related to quality of service metrics at the open cache nodes that is responsible for delivering the streaming content.

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SVTA2028: Open Caching Configuration Interface: Part 1: Overview and Architecture

This is the first part in a set of documents that specifies the motivational drivers, use cases, and standards for a configuration interface to facilitate interoperability within the content delivery network (CDN) and open caching ecosystems. This document set presents a layered architecture that extends the Internet Engineering Task Force (IETF) CDN Interconnect (CDNi) metadata model and adds publishing layer Application Programming Interfaces (APIs) to provide configuration management capabilities required by the CDN and open caching industries.

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SVTA2029: Open Caching Configuration Interface: Part 2 – Extensions to CDNi Metadata Object Model

This is part two in a set of documents that specifies the motivational drivers, use cases, and standards for a configuration interface to facilitate interoperability within the content delivery network (CDN) and open caching ecosystem. This document presents the context and requirements for extending the Content Delivery Network Interconnection (CDNi) metadata model, as well as specific extensions that will fulfill those requirements.

This document will provide all the necessary information for an Internet Engineering Task Force (IETF) memo describing the Streaming Video Alliance (SVA) metadata interface requirements beyond those stated in RFC-7337 (Content Distribution Network Interconnection Requirements), along with requested extensions to RFC-8006 (Content Delivery Network Interconnection Metadata).

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SVTA2030: Open Caching Configuration Interface: Part 3 – Publishing Layer APIs

This is part three in a set of documents that specifies the motivations, use cases, and standards for a configuration interface to facilitate interoperability within the content delivery network (CDN) and open caching ecosystems. In this document, the requirements for a configuration publishing layer are presented, along with APIs that facilitate the publishing of CDNi metadata objects within the CDN and open caching ecosystems.

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SVTA2007-1: Open Cache Request Routing Functional Specification

This document describes the high-level functional specification of open caching request routing and the required interfaces to enable request routing to be performed from an upstream CDN to an open cache system. This is version 1 of the document.

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SVTA2048: Open Caching API Request Routing Interface

Content delivery delegation in open caching can be realized through two modes of request redirection, iterative and recursive.

Open caching previously supported the iterative mode only. This document describes the data model and architecture changes required to enable the recursive mode of delegation as well.

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SVTA2045: Open Caching API Footprint and Capabilities

This document describes the Application Programming Interface (API) methods and data model related to the Footprint and Capabilities Interface. The API has been entirely designed by the SVTA Open Caching group whereas the data model is based on the IETF Content Delivery Network Interconnection (CDNi) work. and on extensions specified by the SVTA Open Caching group.

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SVTA2052: Configuration Interface Document Manifest Version 2.0

The SVTA Configuration Interface is a multi-part set of documents defining both the metadata model and Application Programming Interfaces (APIs) for entities to publish and retrieve configuration metadata for content caching and delivery.

This manifest specifies the SVTA document numbers and versions of each of the parts and subparts comprising a version of the Configuration Interface. Each individual document in the set is assigned a unique SVTA document number and is versioned independently. OpenAPI definitions as well as communications of compliance with this standard may make references such as Configuration Interface Version 2.0 or Configuration Interface Version 2.1. Those versions of this document manifest can be referenced to determine the SVTA document numbers and versions of the parts and subparts that comprise any given version of the Configuration Interface standard.

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SVTA2028-1: Configuration Interface Part 1: Overview and Architecture

This is the first part in a set of documents that specify the Streaming Video Technology Alliance (SVTA) Configuration Interface, defining both the metadata model and Application Programming Interfaces (APIs) for entities to publish and retrieve configuration metadata. This document specifies the motivational drivers, use cases, and standards to facilitate interoperability within the content delivery network (CDN) and Open Caching ecosystems. The full document set presents a layered architecture that extends the Internet Engineering Task Force (IETF) CDN Interconnect (CDNI) Metadata and Capabilities Models and adds publishing APIs to provide configuration management capabilities required by the CDN and Open Caching industries.

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SVTA2029-1: Configuration Interface Part 2: CDNI Metadata Model Extensions

The Internet Engineering Task Force (IETF) Content Delivery Networks Interconnection (CDNI) Metadata Interface enables interconnected content delivery networks (CDNs) to exchange content distribution metadata in order to enable content acquisition and delivery. This document and its subparts describe extensions to the CDNI Metadata Object Model as documented in “CDNI Metadata” [RFC8006] to address the complex requirements of the commercial CDN industry and to support a wider set of use cases such as Open Caching.

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SVTA2030-1: Configuration Interface Part 3: Simple Configuration Metadata API

This is part 3 in a set of documents that specify the Streaming Video Technology Alliance (SVTA) Configuration Interface. This document presents the Simple Configuration Metadata API, which provides basic metadata retrieval and publishing capabilities, as introduced in SVTA Configuration Interface Part 1 Introduction & Architecture [SVTA2028].

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SVTA2031: Configuration Interface Part 2a: Metadata Expression Language (MEL)

This document specifies the syntax and provides usage examples for an expression language to be used within Streaming Video Technology Alliance (SVTA)/Content Delivery Network Interconnection (CDNI) Metadata Interface (MI) objects. The purpose of this expression language is to enable metadata to be applied conditionally (based on aspects of an HTTP request), and to enable Hypertext Transfer Protocol (HTTP) responses to be generated or altered dynamically.

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SVTA2032: Configuration Interface Part2b: Processing Stages Metadata

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SVTA2033: Configuration Interface Part 2c: Cache Control Metadata

This specification adds to the basic cache control metadata defined in [RFC8006], providing content providers and upstream CDNs (uCDNs) more fine-grained control over downstream CDN (dCDN) caching. Use cases include overriding or adjusting cache control headers from the origin, bypassing caching altogether, or altering cache keys with dynamically generated values.

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SVTA2034: Configuration Interface Part 2d: Source Access Control Metadata

This specification provides an alternative to the MI.SourceMetadata objects defined in [RFC8006], providing greatly extended capabilities with regards to defining multiple sources, load balancing, and failover rules across those sources, as well as a mechanism for a content delivery network (CDN) to monitor source health and pull unhealthy sources out of rotation. Additionally, new methods are defined for authentication access to an upstream source/origin.

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SVTA2035: Configuration Interface Part 2e: Client Access Control Metadata

This specification adds to the basic client access control metadata in [RFC8006], providing content providers and upstream content delivery networks (uCDNs) extended capabilities in defining location and time window restrictions. Support is also provided to define required Transport Layer Security (TLS) certificates and encryption levels.

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SVTA2036: Configuration Interface Part 2f: Edge Control Metadata

This specification defines configuration metadata objects related to controlling edge access to resources via content delivery networks (CDNs) and Open Caching systems. Configuring Cross-Origin Resource Sharing (CORS) access rules and the dynamic generation of CORS headers is a key feature of typical configurations, as are the ability to define response body compression rules and client connection timeouts.

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SVTA2037: Configuration Interface Part 2g: Delivery Metadata

This specification adds to the core set of configuration metadata defined in [RFC8006], providing delivery metadata to define traffic types, Open Caching request delegation behavior for Open Caching node selection, and request routing modes of traffic delegation.

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SVTA2038: Configuration Interface Part 2h: Private Features Metadata

This specification defines a mechanism for downstream content delivery networks (dCDNs) to define private extensions to the metadata model that are mutually agreed upon between participating upstream content delivery networks (uCDNs) and dCDNs.

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SVTA2039: Configuration Interface Part2i: Protected Secrets Metadata

This document defines a simple mechanism for protected secret data (such as salt values or encryption keys) that may be embedded in configuration metadata or capabilities advertisements.

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SVTA2040: Configuration Interface Part 4: Service Configuration Model

This specification introduces the Service Configuration Model, an object layer that wraps the HostMatch metadata defined in [RFC8006] with a construct defining content delivery network (CDN) Services and Properties (groups of hosts with shared metadata definitions), as well as reusable metadata definitions that can be used across all of a service’s CDN Properties. The Service Configuration Model represents a self-contained bundle of configuration metadata and definitions that can be published and deployed as an atomic unit without external references. This model is defined independently of any Application Programming Interface (API) and will be used as the basis for the Streaming Video Technology Alliance (SVTA) Orchestration API.

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SVTA2041: Configuration Interface Part 5: Metadata Capabilities

This document defines the requirements and model for a CDNI Footprint & Capabilities (FCI) object that allows a downstream content delivery network (dCDN) to advertise the configuration metadata capabilities that it supports. It goes beyond the simple FCI.Metadata object defined in [RFC80008] by providing fine-grained advertisements with allowed usage contexts and allowed values as well as advertisements for specific Metadata Expression Language (MEL) capabilities.

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SVTA2042: Configuration Interface Part 6: Orchestration API

The Orchestration API provides full configuration metadata lifecycle management, with publishing and staged deployment as distinct operations, along with versioning and rollback capabilities. The API provides capabilities required by infrastructure orchestration tools such as Terraform and Ansible to issue the commands necessary to update a dCDN configuration to a desired state.

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SVTA5044: Open Caching API Implementation Guidelines

The Streaming Video Technology Alliance Open Caching Application Programming Interfaces (APIs) are described in several documents, each related to a particular interface. This document is the starting point for anyone implementing these APIs. It describes the Open Caching model and includes modes of operations necessary for implementation.

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SVTA2049: Capacity Insights Interface

This document describes the Capacity Insights Interface that allows content providers (CPs), service providers (SPs), and content delivery networks (CDNs) to exchange information to facilitate an integrated and informed end-to-end traffic steering workflow. The goal is to enable real-time traffic steering based on available capacity in an effort to keep key performance indicators (KPIs) at acceptable levels. Mechanisms such as reservations and service level agreements (SLAs) are considered out of scope for the purpose of this interface.

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SVTA2050: Logging Specification

This document describes extensions to the Open Caching Configuration API and the Content Delivery Networks Interconnection (CDNI) Footprint & Capabilities Interface [RFC8008] to support configuration and advertisement of logging capabilities, along with examples and best practices to support logging,log record transformation and transmission between participants within an Open Caching environment. The extensions are based on the Internet Engineering Task Force (IETF) CDNI Request for Comments (RFCs) and extensions proposed by this Streaming Video Technology Alliance (SVTA) group.

Draft

Note that to download draft documents, you must be an employee of an active member company with an ARO account. If you are part of a member company and don’t yet have an ARO account, you can request one here.

SVTA2050: Open Caching Logging Specification

SVTA2048: Open Caching Request Routing Interface

SVTA2028-1: Configuration Interface Part 1: Overview and Architecture

SVTA2029-1: Configuration Interface Part 2: CDNI Metadata Model Extensions

The Internet Engineering Task Force (IETF) Content Delivery Networks Interconnection (CDNI) Metadata Interface enables interconnected content delivery networks (CDNs) to exchange content distribution metadata in order to enable content acquisition and delivery. This document and its subparts describe extensions to the CDNI Metadata Object Model as documented in “CDNI Metadata” [RFC8006] to address the complex requirements of the commercial CDN industry and to support a wider set of use cases such as Open Caching.

SVTA2030-1: Open Caching Configuration Interface Part 3: Simple Configuration Metadata API

SVTA2031: Configuration Interface Part 2a: Metadata Expression Language (MEL) Version 2.0

SVTA2032: Open Caching Configuration Interface Part 2b: Processing Stages Metadata

SVTA2033: Configuration Interface Part 2c: Cache Control Metadata

SVTA2034: Configuration Interface Part 2d: Source Access Control Metadata

SVTA2035: Configuration Interface Part 2e: Client Access Control Metadata

SVTA2036: Configuration Interface Part 2f: Edge Control Metadata

SVTA2037: Configuration Interface Part 2g: Delivery Metadata

SVTA2038: Configuration Interface Part 2h: Private Features Metadata

SVTA2039: Configuration Interface Part 2i: Protected Secrets Metadata

SVTA2040: Configuration Interface Part 4: Service Configuration Model

SVTA2041: Configuration Interface Part 5: Metadata Capabilities

SVTA2042: Configuration Interface Part 6: Orchestration API

(DRAFT) SVTA2043: Open Caching Configuration Interface Part 7: Terraform Integration Version 2.0

SVTA2045: Open Caching API Footprint and Capabilities

SVTA2049: Open Caching Capacity Insight Interface

This document describes the Capacity Insights Interface that allows content providers (CPs), service providers (SPs), and content delivery networks (CDNs) to exchange information to facilitate an integrated and informed end-to-end traffic steering workflow. The goal is to enable real-time traffic steering based on available capacity in an effort to keep key performance indicators (KPIs) at acceptable levels. Mechanisms such as reservations and service level agreements (SLAs) are considered out of scope for the purpose of this interface.

SVTA2052: Configuration Interface: Document Manifest Version 2.0

The SVTA Configuration Interface is a multi-part set of documents defining both the metadata model and Application Programming Interfaces (APIs) for entities to publish and retrieve configuration metadata for content caching and delivery.

This manifest specifies the SVTA document numbers and versions of each of the parts and subparts comprising a version of the Configuration Interface. Each individual document in the set is assigned a unique SVTA document number and is versioned independently. OpenAPI definitions as well as communications of compliance with this standard may make references such as Configuration Interface Version 2.0 or Configuration Interface Version 2.1. Those versions of this document manifest can be referenced to determine the SVTA document numbers and versions of the parts and subparts that comprise any given version of the Configuration Interface standard.

SVTA5044: Open Caching API Implementation Guidelines

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