README.heartbeat

mod_heartbeat

Broadcasts the current Apache Connection status over multicast.

Example Configuration:
  HeartbeatAddress 239.0.0.1:27999

Dependencies:
  mod_status must be either a static module, or if a dynamic module, it must be 
  loaded before mod_heartbeat.


Consuming:
  Every 1 second, this module generates a single multicast UDP packet,
  containing the number of busy and idle workers.
  
  The packet is a simple ASCII format, similar to GET query parameters in UDP.
  
  An Example packet:
    v=1&ready=75&busy=0

  Consumers should handle new variables besides busy and ready, separated by '&'
  being added in the future.
  
Misc:
  The interval of 1 seconds is controlled by the HEARTBEAT_INTERVAL
  compile time define.  This is not currently tunable at run time. To make this
  module send the status packet more often, you must add to the CFLAGS used to
  compile the module to include:
    -DHEARTBEAT_INTERVAL=3
  Would cause the broadcasts to be sent every 3 seconds.