The use_logd directive specifies whether heartbeat logs its messages through logging daemon or not. The syntax is simple
Default is no.
If use_logd is "yes", all log messages will be sent through IPC to the logging daemon, which then writes them into log files. If the logging daemon is not running, a warning message will be logged and all messages will be written to log files directly. It is not heartbeat's responsibility to start/stop the logging daemon.
If use_logd is "no", all log messages will be written to log files directly.