Today I mounted a WebDav share to the host and passed it in to Jellyfin and added it to my library. Then, I realized that Jellyfin is downloading the entire contents of the mount as it scans the library (I can’t actually see what it’s downloading but it’s been using 10mb/s for the past hour). So it’s trying to download 1TB of media just to scan the library. I am not even trying to access anything. Is this normal?
I went and whacked the scan library button on a 30tb library collection and it didn’t read all that much data (looks like under 100gb) and seemed to be pretty quick - maybe 45 seconds. Local drives and all that, so the speed of the scan doesn’t matter as much as the relatively small amount of data. If all you had was 1tb of media, I’d expect it to just be a couple of gigabytes, not huge amounts of data.
I’d probably double-check that however you’ve mounted the WebDAV share is supporting partial reads, since that really feels to me like the first place that something could be wrong that would cause excessive amounts of file transfers.
Not supporting partial reads could be the issue. I’ll take a look at that.