---- /!\ '''Edit conflict - other version:''' ----
||<rowbgcolor="#cccccc"> '''Feature''' || '''Nagios''' ||'''Icinga''' || '''OpenNMS''' || '''Zenoss''' || '''Shinken''' ||
|| Packaged || (./) (main) [1] || (./) (universe) [2] || Upstream archive packaged, needs review. [3] || Unknown || PPA, needs more work and review. [4] ||
|| Scalability || Push only (Polling scale-out with mod_gearman)[5] || Same as Nagios[6] || ? || ? || Native Load Balancing ||
|| High Availability || None || None || ? || ? || (./) N+1 [7] ||


==== References: ====
 1. https://launchpad.net/ubuntu/+source/nagios
 2. https://launchpad.net/ubuntu/+source/icinga
 3. http://www.opennms.org/wiki/Installation:Debian
 4. https://launchpad.net/~shinken-dev/+archive/ppa
 5. http://labs.consol.de/lang/de/nagios/mod-gearman/
 6. https://wiki.icinga.org/display/howtos/Setting+up+mod+gearman+with+Icinga
 7. http://www.shinken-monitoring.org/features/cloud-alike-architecture/how-the-high-availability-works/