Problem with Persistence

[DivineJimmi]

Hello, i have 2 Items which are not connected to any Thing. So these items lose their state after an restart.
Now i added a persistence to it, but at least one of them is still losing its state.

RRD4j Persistence Add-On is installed
Settings → Persistence → RRD4j is checked

.items

Number Timer_Bewegungsmelder_Flur "Abschaltzeit Bewegungsmelder Flur [%ds]"
String Tageszeit "Tageszeit [%s]" <sun>

rrd4j.persist

Strategies {
    default = everyChange
}
Items {
    Timer_Bewegungsmelder_Flur : strategy = everyChange, restoreOnStartup
    Tageszeit : strategy = everyChange, restoreOnStartup
}

Timer_Bewegungsmelder_Flur stores the value correctly.
Tageszeit does not.

What did i do wrong?

[Wolfgang_S]

@DivineJimmi

What did i do wrong?

You know this from the RRD4J peristence documentation page ?

NOTE: rrd4j is for storing numerical data only. It cannot store complex data types. The supported item types are therefore only Switch (internally mapped to 0/1), Dimmer, Number, Contact (internally mapped to 0/1), Rollershutter and Color (only brightness component stored)

To store strings e.g. use influxdb.

[rpwong (Russ)]

@Wolfgang_S

To store strings e.g. use influxdb.

If all that’s required is restoreOnStartup, I’d suggest MapDB instead. It just saves the most recent state of any item, regardless of type.

[DivineJimmi]

Thanks you! Now it works.

Can you answer me one last question?

This should work the same, like my code before, right?

Strategies {
    default = everyChange, restoreOnStartup
}
Items {
    Timer_Bewegungsmelder_Flur
    Tageszeit
}