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Internet Web Replication and Caching Taxonomy (RFC3040)

IP.com Disclosure Number: IPCOM000005234D
Original Publication Date: 2001-Jan-01
Included in the Prior Art Database: 2001-Aug-20
Document File: 33 page(s) / 64K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

I. Cooper: AUTHOR [+3]

Abstract

This memo specifies standard terminology and the taxonomy of web replication and caching infrastructure as deployed today. It introduces standard concepts, and protocols used today within this application domain. Currently deployed solutions employing these technologies are presented to establish a standard taxonomy. Known problems with caching proxies are covered in the document titled "Known HTTP Proxy/Caching Problems", and are not part of this document. This document presents open protocols and points to published material for each protocol.

This text was extracted from a ASCII document.
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Network Working Group I. Cooper Request for Comments: 3040 Equinix, Inc. Category: Informational I. Melve

UNINETT

G. Tomlinson CacheFlow Inc.

January 2001

Internet Web Replication and Caching Taxonomy

Status of this Memo

This memo provides information for the Internet community. It does not specify an Internet standard of any kind. Distribution of this memo is unlimited.

Copyright Notice

Copyright (C) The Internet Society (2001). All Rights Reserved.

Abstract

This memo specifies standard terminology and the taxonomy of web replication and caching infrastructure as deployed today. It introduces standard concepts, and protocols used today within this application domain. Currently deployed solutions employing these technologies are presented to establish a standard taxonomy. Known problems with caching proxies are covered in the document titled "Known HTTP Proxy/Caching Problems", and are not part of this document. This document presents open protocols and points to published material for each protocol.

Table of Contents

1. Introduction . . . . . . . . . . . . . . . . . . . . . . . 3 2. Terminology . . . . . . . . . . . . . . . . . . . . . . . 3 2.1 Base Terms . . . . . . . . . . . . . . . . . . . . . . . . 4 2.2 First order derivative terms . . . . . . . . . . . . . . . 6 2.3 Second order derivatives . . . . . . . . . . . . . . . . . 7 2.4 Topological terms . . . . . . . . . . . . . . . . . . . . 7 2.5 Automatic use of proxies . . . . . . . . . . . . . . . . . 8 3. Distributed System Relationships . . . . . . . . . . . . . 9 3.1 Replication Relationships . . . . . . . . . . . . . . . . 9 3.1.1 Client to Replica . . . . . . . . . . . . . . . . . . . . 9 3.1.2 Inter-Replica . . . . . . . . . . . . . . . . . . . . . . 9 3.2 Proxy Relationships . . . . . . . . . . . . . . . . . . . 10 3.2.1 Client to Non-Interception Proxy . . . . . . . . . . . . . 10

Cooper, et al. Informational [Page 1]

RFC 3040 Internet Web Replication Caching Taxonomy January 2001

3.2.2 Client to Surrogate to Origin Server . . . . . . . . . . . 10 3.2.3 Inter-Proxy . . . . . . . . . . . . . . . . . . . . . . . 11 3.2.3.1 (Caching) Proxy Meshes . . . . . . . . . . . . . . . . . . 11 3.2.3.2 (Caching) Proxy Arrays . . . . . . . . . . . . . . . . . . 12 3.2.4 Network Element to Caching Proxy . . . . . . . . . . . . . 12 4. Replica Selection . . . . . . . . . . . . . . . . . . . . 13 4.1 Navigation Hyperlinks . . . . . . . . . . . . . . . . . . 13 4.2 Replica HTTP Redirection . . . . . . . . . . . . . . . . . 14 4.3 DNS Redirection . . . . . . . . . . . . . . . . . . . . . 14 5. Inter-Replica Communication . . . . . . . . . . . . . . . 15 5.1 Batch Driven Replication . . . . . . . . . . . . . . . . . 15 5.2 Demand Driven Replication . . . . . . . . . . . . . . . . 16 5.3 Synchronized Replication . . . . . . . . . . . . . . . . . 16 6. User Agent to Proxy Con...