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  • >> Go to dataminer.services

Correlation – Count number of alarms with certain severity

Solved2.45K views4th January 2023Correlation Script Condition
2
Jochen Dewachter [SLC] [DevOps Advocate]2.16K 30th December 2022 0 Comments

What is the correct syntax for a correlation rule script condition to count the number of alarms in a bucket with a certain severity?

Use case: I have 5 IRD elements receiving a carrier from the same transmitting antenna. I want to trigger the correlation rule (to switch to another antenna) if all IRDs that are not in timeout give a critical alarm on their lock state.

Was thinking of a script condition like this: count(severity(critical)) == 5 - count(severity(timeout)) but I'm stuck on syntax...

Jochen Dewachter [SLC] [DevOps Advocate] Selected answer as best 4th January 2023

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Thijs Vanovenacker [SLC] [DevOps Advocate]2.21K Posted 30th December 2022 3 Comments

Hi Jochen,
Maybe not the answer you are looking for, but you could also create a service in DataMiner to represent that physical antenna based on information received via the batch of IRDs linked to it.

you could exclude your devices in timeout to avoid them impacting the service state.

If you do not want timeouts to be included in the alarm status of the service, clear the checkbox Include timeouts in alarm status of the service. By default, this option is selected.

reference: Adding a service | DataMiner Docs

You can now configure the service using conditions for the alarm impact to only allow impact when all 5 of your IRD lock state parameters are failing.

This service is now representing a basic form of your Antenna reception quality.  You could further extend this service to make it smarter and expose also other metrics to build.  you could even go with a service template, and make it easy to visualize your complete antenna park.

Have fun 😉

need a recap on creating services? Please have a look here:
Rui's Rapid Recap - Creating a service - DataMiner Dojo

Jochen Dewachter [SLC] [DevOps Advocate] Posted new comment 3rd January 2023
Jochen Dewachter [SLC] [DevOps Advocate] commented 30th December 2022

Nice alternative! Going to try that!

Thijs Vanovenacker [SLC] [DevOps Advocate] commented 30th December 2022

Having a service representing your antenna is also a good opportunity to add a Visual that can serve to link towards other useful information in regards to your antenna. (location data, weather data, Spectrum analysis of your RF signals and many more)

Jochen Dewachter [SLC] [DevOps Advocate] commented 3rd January 2023

FYI, I’d still like to know the syntax for the correlation rule. When doing it with a service like you described, I require quite some conditions (amount is growing fast with the number of devices in the service)

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