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Uptime sensor

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Hi all,

It the uptime of a sensor calculated for the period of time that the sensor is added and receiving data, or based on another period. I don't mean the uptime-sensor but when I open detail of a sensor, I see info like;

Last Scan:57 s
Last Up:57 s
Last Down:32 d
Uptime:99.9993%
Downtime:0.0007%
Coverage:100%
Sensor Type:Ping
Dependency:iDRAC
Interval:every 60 s
ID:#9775

I want to build a uptime-reporting bu using the PRTG API want I want to have a good understanding how the uptime is calculated.

best regards
dave

api prtg uptime

Created on Sep 29, 2016 12:53:57 PM

Last change on Sep 29, 2016 2:45:44 PM by Luciano Lingnau [Paessler]



1 Reply

Votes:

0

Dear Dave

A sensor has coverage, and downtime. If there were no sensor scanning requests, then there is no coverage. That means it could be the case that a sensor with less than 100% coverage still has 0% downtime. Or vice versa, a sensor with 100% uptime might have less than 100% coverage.

The sensor status bar always shows global coverage/uptime/downtime, since sensor creation.

The downtime computation slightly optimistic: If there are two scanning intervals in succession in which the sensor is down, the downtime length is considered to be just one interval (the one between the two failed scans.)

Created on Sep 30, 2016 2:47:24 PM by Arne Seifert [Paessler Support]




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