Can one remove a specific file from all snapshots?

[Rainer Duffner]

> Am 18.05.2018 um 22:17 schrieb Alex Aminoff <aminoff at nber.org>:
> 
> 
> The use case here is that we have data sets of sensitive data that we are contractually obligated to delete with no backups at a certain point in time. The datasets are stored on a ZFS filesystem (on a truenas from IxSystems as it happens). The snapshots are kept for 15 days, so at the moment we have to rm the files 15 days before the deadline to be compliant. Is there a way to delete a specific file from the live filesystem as well as all the snapshots?
> 
> I did find a post to this list from 2014:
> 
> https://lists.freebsd.org/pipermail/freebsd-fs/2014-October/020307.html
> 
> but I don't think it is relevant, and in any case it does not appear that the feature that post describes was implemented.
> 
> Thanks,
> 




AFAIK, snapshots are still read-only.

BTRFS seems to have writable snapshots - but I’ve no idea how it actually works.

I would suggest to change your contracts - that will be much easier than changing ZFS.