On Oct 31, 2008, at 9:57 AM, L B wrote: > Thanks Mark for your answers > >>> What is the difference between checking a host is alive with a check >>> in the host template (check_command check-host-alive), and >>> creating a >>> ping service applied to the host ? >> >> If the host check returns a non-OK state, notifications for services >> on that host are suppressed. If the host is specified as a parent to >> another host that is also unavailable, the second host is put in an >> UNREACHABLE state as opposed to a DOWN state. > > Hmm ok...
>> If you like the suppression of notifications for services on down >> hosts or would like to use the parenting/reachability logic, host >> checks would be necessary. > > I don't get notification of services unavailability even with hot > check disabled, because Nagios does a host check directly after it > find a service unavailable. I thought you said you didn't do host checks? So you're not really asking about the merits of a host check v.s. a service check but rather the merits of (Regularly Scheduled host checks and no service checks) and (Service check and on-demand host check only)? > Not additional if you replace the ping check by the hostcheck I guess that I'm a traditionalist and still feel that every host should have a service check =) That may be a something I need to change. > Is the impact of enabling hostchecks vs ping service only a status of > UNREACHABLE instead of DOWN for child hosts ? No, notification suppression as well, but if you're doing on-demand host checks currently you're already getting that. The only real benefits may be one less regular check to configure (the service check) and the possible use of a cached host check instead of a new active check when determining outages. IMHO based on my expectation/ understanding of the new host check methodology, the actual number of checks performed either way are going to be similar except over very long time periods with volatile networks. -- Marc ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Nagios-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/nagios-users ::: Please include Nagios version, plugin version (-v) and OS when reporting any issue. ::: Messages without supporting info will risk being sent to /dev/null
