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Self-Tuning Distributed Hash Table (DHT) for REsource LOcation And Discovery (RELOAD)
RFC 7363

Internet Engineering Task Force (IETF)                        J. Maenpaa
Request for Comments: 7363                                  G. Camarillo
Category: Standards Track                                       Ericsson
ISSN: 2070-1721                                           September 2014

                Self-Tuning Distributed Hash Table (DHT)
              for REsource LOcation And Discovery (RELOAD)

Abstract

   REsource LOcation And Discovery (RELOAD) is a peer-to-peer (P2P)
   signaling protocol that provides an overlay network service.  Peers
   in a RELOAD overlay network collectively run an overlay algorithm to
   organize the overlay and to store and retrieve data.  This document
   describes how the default topology plugin of RELOAD can be extended
   to support self-tuning, that is, to adapt to changing operating
   conditions such as churn and network size.

Status of This Memo

   This is an Internet Standards Track document.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It represents the consensus of the IETF community.  It has
   received public review and has been approved for publication by the
   Internet Engineering Steering Group (IESG).  Further information on
   Internet Standards is available in Section 2 of RFC 5741.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   http://www.rfc-editor.org/info/rfc7363.

Copyright Notice

   Copyright (c) 2014 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
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   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.

Maenpaa & Camarillo          Standards Track                    [Page 1]
RFC 7363               Self-Tuning DHT for RELOAD         September 2014

Table of Contents

   1. Introduction ....................................................2
   2. Terminology .....................................................3
   3. Introduction to Stabilization in DHTs ...........................5
      3.1. Reactive versus Periodic Stabilization .....................5
      3.2. Configuring Periodic Stabilization .........................6
      3.3. Adaptive Stabilization .....................................7
   4. Introduction to Chord ...........................................7
   5. Extending Chord-Reload to Support Self-Tuning ...................9
      5.1. Update Requests ............................................9
      5.2. Neighbor Stabilization ....................................10
      5.3. Finger Stabilization ......................................11
      5.4. Adjusting Finger Table Size ...............................11
      5.5. Detecting Partitioning ....................................11
      5.6. Leaving the Overlay .......................................11
   6. Self-Tuning Chord Parameters ...................................12
      6.1. Estimating Overlay Size ...................................12
      6.2. Determining Routing Table Size ............................13
      6.3. Estimating Failure Rate ...................................13
           6.3.1. Detecting Failures .................................14
      6.4. Estimating Join Rate ......................................14
      6.5. Estimate Sharing ..........................................15
      6.6. Calculating the Stabilization Interval ....................17
   7. Overlay Configuration Document Extension .......................17
   8. Security Considerations ........................................18
   9. IANA Considerations ............................................18
      9.1. Message Extensions ........................................18
      9.2. New Overlay Algorithm Type ................................19
      9.3. A New IETF XML Registry ...................................19
   10. Acknowledgments ...............................................19
   11. References ....................................................19
      11.1. Normative References .....................................19
      11.2. Informative References ...................................20

1.  Introduction

   REsource LOcation And Discovery (RELOAD) [RFC6940] is a peer-to-peer
   signaling protocol that can be used to maintain an overlay network

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