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MQTT - size limitation

 
Data Acquisition
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BO
 BO
(@b-olombelarcinfo-com)
Posts: 196
Reputable Member
Topic starter
 

Hello,

Is there any limitation about the number of variables published in MQTT ?
Any experience ? Feedback ?

thanks

 
Posted : 05/07/2022 4:15 pm
 Giulia Magnesa
(@admin_doc72)
Posts: 493
Member Admin
 

Hello Brice,

This year we have done a project with 4000 variables published in MQTT.

As a feedback you can have a look on this article on our web site

https://www.atys-concept.com/blog-de-la-performance/articles-supervision/mqtt-interconnexion-logiciels-industrie/

 
Posted : 19/08/2022 9:34 pm
n.kunzer
 n.kunzer
(@n-kunzerarcinfo-com)
Posts: 1236
Member Moderator
 

Hi Mohamed,
Interesting! Could you tell us, roughly, the data flow (number of publishing / mn or sec)?

Nico

 
Posted : 22/08/2022 6:40 pm
 Giulia Magnesa
(@admin_doc72)
Posts: 493
Member Admin
 

Hi Nicolas,

I don't have the statistics about the number of publishing / min or sec but regarding the data published (physical measurement such as flows, temperature, levels, speeds, volume) i can say that we had a considerable number of publishing per sec. The publishing was on change that means every time the VTQ of the variable changes, PcVue publish in the broker.

At the commissioning of this project, we had a high flow of publishing data. In order to verify some variables, i remember that i needed to stop publishing.

 
Posted : 22/08/2022 10:21 pm
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