Self-tuning Distributed Hash Table (DHT) for REsource LOcation And Discovery (RELOAD)
draft-ietf-p2psip-self-tuning-09
P2PSIP Working Group J. Maenpaa
Internet-Draft G. Camarillo
Intended status: Standards Track Ericsson
Expires: February 11, 2014 August 10, 2013
Self-tuning Distributed Hash Table (DHT) for REsource LOcation And
Discovery (RELOAD)
draft-ietf-p2psip-self-tuning-09.txt
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.
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. Introduction to Stabilization in DHTs . . . . . . . . . . . . 5
3.1. Reactive vs. 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 . . . . . . . . . . . . . . . . . . 15
6.5. Estimate Sharing . . . . . . . . . . . . . . . . . . . . 15
6.6. Calculating the Stabilization Interval . . . . . . . . . 16
7. Overlay Configuration Document Extension . . . . . . . . . . 17
8. Security Considerations . . . . . . . . . . . . . . . . . . . 17
9. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 18
9.1. Message Extensions . . . . . . . . . . . . . . . . . . . 18
10. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 18
11. References . . . . . . . . . . . . . . . . . . . . . . . . . 18
11.1. Normative References . . . . . . . . . . . . . . . . . . 19
11.2. Informative References . . . . . . . . . . . . . . . . . 19
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 21
1. Introduction
REsource LOcation And Discovery (RELOAD) [I-D.ietf-p2psip-base] is a
peer-to-peer signaling protocol that can be used to maintain an
overlay network, and to store data in and retrieve data from the
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