Cisco Conference Phone - Manual (Page 48)

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Installation and Upgrade Guide for Cisco Unified MeetingPlace Web Conferencing Release 5.3
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Chapter 4 Installing Cisco Unified MeetingPlace Web Conferencing Release 5.3 in a Load Balancing Configuration
About Installing Cisco Unified MeetingPlace Web Conferencing Release 5.3 in a Load Balancing Configuration for
Cisco Unified MeetingPlace Web Conferencing Load Balancing Algorithm
The current data-conferencing (DC) load balancing algorithm is as follows:
X = 0.5 * (CPUPercent * 0.6 + MemPercent * 0.4) + DCLoad * DCLoad, where the values for the factors
are as follows:
• CPUPercent—The value of the particular resource’s usage on the web server as reported by
Windows. This value ranges from 0 to 1 as a percent, for example, if 50%, then 0.5.
• MemPercent—The value of the particular resource’s usage on the web server as reported by
Windows. This value ranges from 0 to 1 as a percent.
• DCLoad—The percent of the total number of web or data conferencing (DC) users. This value
ranges from 0 to 1 as a percent.
• X—The load balancing factor. The X value is calculated for each server, and the server with the
lowest score hosts the meeting.
Suggestions for a Robust Cisco Unified MeetingPlace System
To ensure a robust system with redundancy and failover, we recommend that you have the following:
• An internal web cluster
• An external web cluster
• Multiple remote SQL Servers in the form of an SQL farm
• Remote storage location with RAID5 and a comprehensive backup policy
About Installing Cisco Unified MeetingPlace Web Conferencing
Release 5.3 in a Load Balancing Configuration for
Video-Enabled Systems
Cisco Unified MeetingPlace Web Conferencing limits video functionality to one web server. It is
important to consider this limitation when configuring load balancing in video-enabled systems.
Before you configure Cisco Unified MeetingPlace Web Conferencing load balancing in video-enabled
systems, you should understand the following concepts:
• Default Behavior of Load Balancing in Video-Enabled Systems, page 4-6
• Video Meetings in Segmented Meeting Access Deployments, page 4-7
• SQL Server Considerations, page 4-7
• End-User Considerations, page 4-8
Default Behavior of Load Balancing in Video-Enabled Systems
If your Cisco Unified MeetingPlace Audio Server system is licensed for video, all of the web servers
connected to it will display video-related fields. These fields appear on the following pages for those
users who have video scheduling privileges and allow such users to schedule their meetings from any
web server: