Okay, I've searched this problem for hours and found minimal clues as to what I'm doing differently that would cause this. I setup 3 ZFS Cache Pools: 1 for Appdata & System; 1 for downloads (no critical and not even SSDs; and 1 for Domain for my VMs.

 

I pretty much have been only doing snapshots on the Appdata/System and the Domain/VM drives. I setup datasets for each docker appdata folder to be able to rollback an individual docker folder if needed. Love the idea of not having to shutdown (especially for Plex).

 

I'm pretty much only taking 1 snapshot right before I update a docker container which is about 1x/week (mimicking what I used to do with the appdata backup plugin). So after about 2 months, my cache drives are filling up.

 

Should I be deleting these snapshots? It seems like some people run snapshots every hour or every day. I can't imagine if my drives are filling up just with snapshots 1x/week.

 

Looking for guidance to make the proper adjustments for my use-case.

 

I would like to replace what appdata backup did without having to shut down containers and VMs; ideally would back the snapshots up to the array (which I know SIO has a video on).
 

 

5 minutes ago, TBoneStaek said:

I can't imagine if my drives are filling up just with snapshots 1x/week

One snapshot once a week will take the same space as one snapshot per hour every day during that same week, what matters is how much data changed between the first and the last snapshots, if you are running out of space start deleting older snapshots.