Based on LVS, Ultra Monkey focuses on local area network load
balancing and other highly available services using Open Source
components on Linux that includes heartbeat and ldirectord from the
Linux-HA project. Ultra Monkey is also producing a scalable, highly
available web farm, but it can be easily expanded to other
services, like FTP or e-mail.
"Red Hat Cluster Suite
Available as additional programs to the highly reliable Red Hat
Enterprise Server distribution, Red Hat Cluster Suite provides two
different types of clustering namely Application/Service Failover
and IP Load Balancing. Its Cluster Manager provides application
failover, while its Load Balancer gives the ability to load balance
IP traffic across a farm of servers."