1: Introduction; Overview; Ha Server Switch-Over After A Failure Event - Lucent Technologies CentreVu Release 3 Version 8 High Availability User Manual

Introduction

Overview

Chapter 1: Introduction
Overview
HA Server
Switch-over After
a Failure Event
The primary purpose of the CMS High Availability offer is to ensure an
uninterrupted data stream between the DEFINITY ECS and the CMS
system, which is achieved by connecting two CMS servers at one site to
one DEFINITY® system, thereby eliminating the traditional single point of
failure between the CMS and the DEFINITY system.
Both CMS servers collect data from the DEFINITY®, but they operate
completely independently and are not even aware of each other. With
few exceptions (which will be discussed in detail later), both CMS servers
provide full CMS capabilities. Should either server fail, lose connection to
the DEFINITY®, or need to be brought down for maintenance, the
alternate server can carry the entire CMS activity load. Note that both
CMS servers have to be administered with identical CMS Setup (number
of ACDs in the configuration, data storage allocation, users, features,
etc.).
The High Availability offer relies heavily on manual data synchronization
between the two CMS servers as well as manual administration
synchronization. Therefore, this document will discuss in detail
procedures you will follow to maintain synchronization between the two
CMS servers.
For customers who require continuous access to their CMS data, HA
systems allow for the redirection of LAN traffic related to CMS clients and
peripheral devices from the primary server to the secondary server.
Switch-over from the primary server to the backup server can be
1
performed when the primary server experiences a major failure event.
However, an HA switch-over should be performed only when the
anticipated down time for the primary server is expected to be significant.
Also, since each call center network is configured according to its own
unique specifications, each HA customer must develop their own
customized plans to define their own criteria and requirements for
switch-over events.
CentreVu CMS R3V8 High Availability User Guide
1-1
1