mod_lbmethod_heartbeat
Heartbeat Traffic Counting load balancer scheduler algorithm for mod_proxy_balancer
Experimental
mod_lbmethod_heartbeat.c
lbmethod_heartbeat_module
Available in version 2.3 and later

`lbmethod=heartbeat` uses the services of mod_heartmonitor to balance between origin servers that are providing heartbeat info via the mod_heartbeat module.

This modules load balancing algorithm favors servers with more ready (idle) capacity over time, but does not select the server with the most ready capacity every time. Servers that have 0 active clients are penalized, with the assumption that they are not fully initialized.

mod_proxy
mod_proxy_balancer
mod_heartbeat
mod_heartmonitor
HeartbeatStorage
Path to read heartbeat data
HeartbeatStorage file-path
HeartbeatStorage logs/hb.dat
server config

The HeartbeatStorage directive specifies the path to read heartbeat data. This flat-file is used only when mod_slotmem_shm is not loaded.