Maintenance Manual

Load Balancing
In cases where a Unified IC multi-node deployment experiences a heavy reporting workload,
system administrators have the option to deploy server load balancing (SLB).
SLB is a technique to distribute client requests among the nodes in a cluster or to select the
server that can successfully fulfill a client request in the shortest time without overloading that
server or the cluster as a whole.
It is beyond the scope of this guide to provide details on load balancing, and load balancing is
optional for Unified IC.
The purpose of this Appendix is to present the confguration used for Unified IC on internal
Cisco Quality Assurance lab environments.
Example of ACE Load Balancing Configuration
Cisco Quality Assurance set up load balancing using the Cisco Application Control Engine
(ACE) module. In this environment:
•
Users log in to Unified IC using the ACE virtual IP address, and not the IP Address of the
node.
ACE distributes the client login request to a physical Unified IC server.
•
All nodes used the same UCCE data sources (historical and realtime).
The cluster consisted of eight nodes. The virtual address for ACE was http://10.86.yyy.xxx.
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Appendix B