Build high availability real time sigtran applications with ddp an architectural overview
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Build High-availability Real-time SigTran Applications with DDP --- An Architectural Overview. Qiaobing Xie, Randy Stewart March, 2000. (Motorola). Objectives. Fast, transparent fault tolerance at both link and session levels Link level (SCTP) -- survive network failures

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Build high availability real time sigtran applications with ddp an architectural overview
Build High-availability Real-time SigTran Applications with DDP--- An Architectural Overview

Qiaobing Xie, Randy Stewart

March, 2000

(Motorola)


Objectives
Objectives

Fast, transparent fault tolerance at both link

and session levels

  • Link level (SCTP) -- survive network failures

  • Session level (DDP) – survive process failures


Ddp highlights
DDP Highlights

  • Location transparency and server pooling (2N, N+K, etc.)

  • Load sharing mechanisms

  • Plug-n-play, dynamic scalability

  • No single point of failure


ENRP Name-space

Server Cloud

DDP System View

Call Server

Client 2

Call Server

Client 1

Distrib.

Bulletin

Call Server

Server Pool


Fault tolerance applications
Fault Tolerance Applications

A Reference Model

SigTran Applications

DDP

ENRP

SCTP

m.cast

IP


The enrp server
The ENRP Server

ENRP Server Process

local names,

remote names,

multicast groups, etc.

ENRP

m.cast

SCTP

IP

Entry lists in local memory

To clients

(name query, response, update)

To peer ENRP servers

(update, sync, audit)


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