Definition of a Delay Measurement Infrastructure and Delay-Sensitive Least-Used Policy for Reliable Server Pooling
draft-dreibholz-rserpool-delay-26
Network Working Group T. Dreibholz
Internet-Draft SimulaMet
Intended status: Experimental X. Zhou
Expires: March 13, 2021 Hainan University
September 09, 2020
Definition of a Delay Measurement Infrastructure and Delay-Sensitive
Least-Used Policy for Reliable Server Pooling
draft-dreibholz-rserpool-delay-26
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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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
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