Hi,
by default data in the InfluxDB is always persistant and gets stored for an infinite time. Data will only get deleted after a certain time, if you define a retention policy for this data. But I don't think you did that.
I think when you look into the database after you reboot your ctrlX CORE, you are just looking at the wrong time with your database query.
When working with InfluxDB, its very important to know, that InfluxDB is a time series database. A time series database is built specifically for handling metrics and events or measurements that are time-stamped. So it's very important that the time is set correct on your ctrlX CORE. In addition: If you do a database query to see the "old" data, please look at the time settings of the query you sent to InfluxDB (see the screenshot). This time range of your query has to match with the timestamp of the data you stored in the InfluxDB.
query the data of the last two days
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