How to change lsync log level or completely disable it?

Solution 1:

I'm not that familiar with lsyncd, but judging from the man file -log scarce should be added to the start-up script /etc/init.d/lsyncd

daemon $lsyncd -log scarce -pidfile $pidfile $config

I would also recommend adding /var/log/lsyncd/lsyncd.log to logrotate.

Create /etc/logrotate.d/lsyncd with following:

/var/log/lsyncd/*log {
missingok
notifempty
sharedscripts
postrotate

/sbin/service lsyncd restart > /dev/null 2>/dev/null || true

endscript
}