Jellyfin cloning

[Arson3532]

Let's say we have Jellyfin A on server A, and Jellyfin B in server B.

Jellyfin A is my main jellyfin instance, where all the films are in maximum quality, and I have Jellyfin B, a clone of Jellyfin A with the difference that all the films & shows are encoded so that the size is small (max 720p, etc) (the audiobooks, books and pdfs I have are just a hardlink to server A, it seems working). Please I don't want to spark a discussion on how I ended up in something like this, simply let's accept it that's the way I want things.

Is there any way I can manage only Jellyfin A and copy during the night everything over to Jellyfin B via rsync?
I tried copying config and cache folders as a starter, but it seems something is wrong, because everytime after I run the script to copy over the contents, Jellyfin B is like starting anew (with the wizard - but not always this appears, so this is a bit strange - perhaps it's cache). The good thing is that somehow the name of the instance is not copied (?) so Jellyfin B keeps its name somehow, but I don't know why.
The config/logs folder I think it's not needed, so I ditched it.
I have the films with the exact same locations and names, so I believe trickplay and everything should work. The problem is with .iso files, which they get transformed to mkv in my av1 encoder. Perhaps I should convert them again to iso, so that it's better for the instance. I will check as well.
I want to have plugins as well, but the Notifier should have some modifications. I guess this should be included in the script I run at nights, but I presume this is going to be difficult to change, I don't know where the config is saved at all.

Does anybody have done something like this already? Any suggestions? Is the cache folder needed at all?

[TheDreadPirate]

Can you share the docker config for Jellyfin A?

[Arson3532]

Sure:

Code:

  jellyfin:
    image: jellyfin/jellyfin:10.10.6
    container_name: jellyfin
    group_add:
      - "video"
    ports:
      - "8096:8096"
    restart: 'always'
    environment:
      - JELLYFIN_PublishedServerUrl=https://xxx
      - TZ=...
    volumes:
      - /mnt/user/appdata/arr/jellyfin/config:/config:rw
      - /mnt/user/appdata/arr/jellyfin/cache:/cache:rw
      - /mnt/user/ShareMedia:/media:rw # Where all the videos and series are. I have more volumes for the rest of the places
    devices:
      - /dev/dri
    networks:
      - media-network
    healthcheck:
      test: ["CMD", "curl", "-fsS", "http://localhost:8096/health"]
      interval: 1m
      timeout: 10s
      retries: 3
      start_period: 10m
    labels:
      autoheal-app: true

[TheDreadPirate]

As long as your are copying /config and /cache in their entirety, and that BOTH A and B STOPPED when you sync the two instances, it should migrate no problem.  As long as the media is in the same location from the container's context.  Also, clear your browser cache when you access B to ensure you aren't viewing a cached instance.

Circling back to your opening post.  Avoid ISOs.