Lucent Technologies CentreVu Release 3 Version 8 High Availability User Manual page 16

Introduction
Overview
CentreVu CMS R3V8 High Availability User Guide
3. Power failures: The Primary and Secondary servers should be
separately connected to individual Uninterruptible Power Supplies
(UPS) on separate protected power circuits. This configuration
ensures that both servers will not be simultaneously disabled due to
a localized power failure. However, in the event of an extended
power outage, impacted servers should be powered down in order
to prevent UPS failure and consequent possible data corruption on
the server.
4. CMS software failures: The R3V8 CMS application is duplicated. If
the CMS application fails or a CMS data collection process fails on
one R3V8 CMS server, data collection continues on the second
R3V8 CMS server. You will use the maintenance backup and
restore process to recover the missing data onto the R3V8 CMS
server with the software problems.
5. CMS maintenance: You will not lose data during either a cmsadm
backup or a maintenance backup. You will not lose data when
restoring a maintenance backup as long as you are not restoring
Local System Admin data.
6. CMS full version upgrades: In a High Availability configuration,
one CMS server continues to collect data while the other CMS
server is being upgraded to the new CMS version. After the first
CMS server is upgraded, data collection is turned on for the
upgraded CMS server. The second CMS server is then upgraded
while the upgraded CMS server continues with data collection
turned on. After the second CMS server is upgraded, data
collection is turned on for the second CMS server and the data is
restored between the two CMS servers. Note that if you upgrade
the DEFINITY® with a new release, the interval of data loss is
limited to the amount of time it takes to administer the latest Call
Center Release on the DEFINITY® and pump-up the ACD link. (See
the "Base Load Upgrades with High Availability"
document.)
1-6
section later in this