Resource Directory Replication
draft-amsuess-core-rd-replication-01

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Last updated 2018-03-02
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CoRE                                                          C. Amsuess
Internet-Draft                                            March 02, 2018
Intended status: Informational
Expires: September 3, 2018

                     Resource Directory Replication
                  draft-amsuess-core-rd-replication-01

Abstract

   Discovery of endpoints and resources in M2M applications over large
   networks is enabled by Resource Directories, but no special
   consideration has been given to how such directories can scale beyond
   what can be managed by a single device.

   This document explores different ways in which Resource Directories
   can be scaled up from single network to enterprise and global scale.
   It does not attempt to standardize any of those methods, but only to
   demonstrate the feasibility of such extensions and to provide
   terminology and exploratory groundwork for later documents.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
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   This Internet-Draft will expire on September 3, 2018.

Copyright Notice

   Copyright (c) 2018 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (https://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents

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   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Goals of upscaling  . . . . . . . . . . . . . . . . . . . . .   3
     3.1.  Large numbers of registrations  . . . . . . . . . . . . .   3
     3.2.  Large number of requests  . . . . . . . . . . . . . . . .   3
     3.3.  Redundancy  . . . . . . . . . . . . . . . . . . . . . . .   4
   4.  Approaches  . . . . . . . . . . . . . . . . . . . . . . . . .   4
     4.1.  Shared authority  . . . . . . . . . . . . . . . . . . . .   4
     4.2.  Plain caching . . . . . . . . . . . . . . . . . . . . . .   5
     4.3.  RD-aware caching  . . . . . . . . . . . . . . . . . . . .   6
       4.3.1.  Potential for improvement . . . . . . . . . . . . . .   7
     4.4.  Distinct registration points  . . . . . . . . . . . . . .   7
       4.4.1.  Redundancy and handover . . . . . . . . . . . . . . .   8
       4.4.2.  Loops between RDs and proxies . . . . . . . . . . . .   8
   5.  Proposed RD extensions  . . . . . . . . . . . . . . . . . . .   9
     5.1.  Provenance  . . . . . . . . . . . . . . . . . . . . . . .   9
     5.2.  Lifetime Age  . . . . . . . . . . . . . . . . . . . . . .  10
   6.  Example scenarios . . . . . . . . . . . . . . . . . . . . . .  11
     6.1.  Redundant and replicated resource lookup (anycast)  . . .  11
     6.2.  Redundant and replicated resource lookup (distinct
           registration points)  . . . . . . . . . . . . . . . . . .  12
       6.2.1.  Variation: Large number of registrations, localized
               queries . . . . . . . . . . . . . . . . . . . . . . .  15
       6.2.2.  Variation: Combination with anycast . . . . . . . . .  15
     6.3.  Anonymous global endpoint lookup  . . . . . . . . . . . .  16
   7.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  18
     7.1.  Informative References  . . . . . . . . . . . . . . . . .  18
     7.2.  URIs  . . . . . . . . . . . . . . . . . . . . . . . . . .  18
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .  18

1.  Introduction

   [ See abstract for now. ]

   This document is being developed in a git based workflow.  Please see
   https://github.com/chrysn/resource-directory-replication [1] for more
   details and easy ways to contribute.

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