Ah,
Plone, nice. I used to spend much time there.
If you're wondering about the ability of ZEVO Community Edition 1.1.1 to perform well with a possibly large Data.fs and with BLOBs, I imagine no problem – provided you have enough memory, and keep at least twenty percent free space at the ZFS pool level.
Backup … if I recall correctly, it's highly desirable (critical?) to have an approach that allows both (a) the file system used for BLOBs and (b) Data.fs to be restored from the
same point in time. ZFS snapshots could be a good complement to collective.recipe.backup …