Is it ok to run TVHeadend from SD Card?

[Whiffle]

I have just been looking at the growing number of people that have been using SBC's (RPis, Odroid, Pine64) for all their recordings via TVHeadend.

It seems that they have been installing TVHeadend (and an underlying OS) on the SD Card and then recording to an external Hard Drive.

Does anyone know whether TVHeadend makes constant writes to the installation media or whether things such as EPG updates and scheduling is held in RAM?

 

[Whiffle]

Thank you - that is really assuring to know.

The only other thing that I would need to stick on the SD card is a MYSQL Datatbase that would sync the watched status between all my Kodi client's. I assume that that would also be no particular problem for the card?