Definition of a Delay Measurement Infrastructure and Delay-Sensitive Least-Used Policy for Reliable Server Pooling
draft-dreibholz-rserpool-delay-25

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Network Working Group                                       T. Dreibholz
Internet-Draft                                                 SimulaMet
Intended status: Experimental                                    X. Zhou
Expires: September 14, 2020                            Hainan University
                                                          March 13, 2020

  Definition of a Delay Measurement Infrastructure and Delay-Sensitive
             Least-Used Policy for Reliable Server Pooling
                   draft-dreibholz-rserpool-delay-25

Abstract

   This document contains the definition of a delay measurement
   infrastructure and a delay-sensitive Least-Used policy for Reliable
   Server Pooling.

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   This Internet-Draft will expire on September 14, 2020.

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Scope . . . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.2.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   2
     1.3.  Conventions . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Delay-Measurement Infrastructure  . . . . . . . . . . . . . .   3
     2.1.  Quantification of Distance  . . . . . . . . . . . . . . .   3
     2.2.  Distance Measurement Environment  . . . . . . . . . . . .   3
   3.  Distance-Sensitive Least-Used Policy  . . . . . . . . . . . .   4
     3.1.  Description . . . . . . . . . . . . . . . . . . . . . . .   4
     3.2.  ENRP Server Considerations  . . . . . . . . . . . . . . .   4
     3.3.  Pool User Considerations  . . . . . . . . . . . . . . . .   4
     3.4.  Pool Member Selection Policy Parameter  . . . . . . . . .   5
   4.  Reference Implementation  . . . . . . . . . . . . . . . . . .   5
   5.  Testbed Platform  . . . . . . . . . . . . . . . . . . . . . .   6
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .   6
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   6
   8.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   6
     8.1.  Normative References  . . . . . . . . . . . . . . . . . .   6
     8.2.  Informative References  . . . . . . . . . . . . . . . . .   7
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   8

1.  Introduction

   Reliable Server Pooling defines protocols for providing highly
   available services.  PEs of a pool may be distributed over a large
   geographical area, in order to provide redundancy in case of
   localized disasters.  But the current pool policies defined in
   [RFC5356] do not incorporate the fact of distances (i.e. delay)
   between PU and PE.  This leads to a low performance for delay-
   sensitive applications.

1.1.  Scope

   This draft defines a delay measurement infrastructure for ENRP
   servers to add delay information into the handlespace.  Furthermore,
   a delay-sensitive Least-Used policy is defined.  Performance
   evaluations can be found in [KiVS2007].

1.2.  Terminology

   The terms are commonly identified in related work and can be found in
   the Aggregate Server Access Protocol and Endpoint Handlespace
   Redundancy Protocol Common Parameters document [RFC5354].

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1.3.  Conventions

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this