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mod_proxy_balancer requires the service of mod_proxy, and it provides load balancing for all the supported protocols.

mod_proxy_balancer has following scheduling algorithm

mod_lbmethod_byrequests
mod_lbmethod_bytraffic
mod_lbmethod_bybusyness
mod_lbmethod_heartbeat

Followings are the example of a balancer configuration:

<Proxy "balancer://mycluster">
    BalancerMember "http://192.168.1.50:80"
    BalancerMember "http://192.168.1.51:80"
</Proxy>
ProxyPass        "/test" "balancer://mycluster"
ProxyPassReverse "/test" "balancer://mycluster"

Followings are another example of balancer configuration:

<Proxy balancer://mycluster>
    # WAS1
    BalancerMember http://192.168.10.7:80 route=1 connectiontimeout=1

    # WAS2
    BalancerMember http://192.168.10.8:80 route=2 connectiontimeout=1

    ProxySet lbmethod=byrequests
    ProxySet stickysession=ROUTEID
</Proxy>