TO be clear…with zfs, each lxc machine is assigned its own “file system”. That individual file system can have it own zfs settings, independently of any other lxc machine. So each lxc vm can have their own quota(hard limit), enforced by zfs. And can have their own individual settings for any other zfs property. Like compression or write-through cache might be something else that would benefit some vm’s and not others. Any of which can be adjusted interdependently of other vm’s and independently from the host’s own settings.