Host status concept

Host status as calculated value

Unlike in other similar products, host status in nVision can be changed by events. You can define conditions when a host is considered to have a status <Unknown>, <Up>, <Down> or <Warning>. Of course, host status changes also automatically to reflect the status of services.

Automatic host status changes

Host status is initially set to <Unknown>. It changes when nVision starts to monitor services. After the first service is determined to be running, status changes to <Up>. The status is <Warning> when one or more services are down, but there is still at least one responding service. The host status changes to <Down> when every service is down i.e. not responding.

Host status changed by event

It is very important to understand that nVision also determines the host status according to currently raised events. For this purpose you can define the Change host status to field of each event. When an event for a host is raised, then host status may change according to the host status value defined in this event.

There are three host status values that you can define in this field: <No change>, <Warning> and <Down>. Status <Down> has the biggest priority, which means that if there is at least one event raised with such status, then the host status also becomes <Down> (no matter the status of services). If there are several events with <Warning> and <Down> status raised, then the host status will also be <Down>. If there are only a few events raised with <Warning> status, then the host status becomes <Warning> (unless it is already <Down> due to all services being down - then the status remains <Down>).