Thanks you for your answers, it's clear !

Thanks a lot for all these informations !!
I was afraid about database size but seems that it's ok!
Thank you also for the link to doc domoticz.

I have another question, if MySensors data sent by arduino each 10 seconds, Domoticz store only the last current value each 5 minutes? Not all datas that ...

Hello!

I'm new in the comunity and i have installed domoticz for my home !

I would like to know if there is a way to change the retency policy of the database on GUI on domoticz. i don't want to keep data sensors forever, but just for some week, i'm pushing these data in another database (influxdb ...