Date: Fri, 18 May 2018 23:22:26 +0200 From: Rainer Duffner <rainer@ultra-secure.de> To: Alex Aminoff <aminoff@nber.org> Cc: freebsd-fs@freebsd.org Subject: Re: Can one remove a specific file from all snapshots? Message-ID: <62BA102D-E58F-474D-A4DF-65D2020BEB80@ultra-secure.de> In-Reply-To: <38792b3b-04db-0c7f-c9a4-3f55b908a427@nber.org> References: <38792b3b-04db-0c7f-c9a4-3f55b908a427@nber.org>
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> Am 18.05.2018 um 22:17 schrieb Alex Aminoff <aminoff@nber.org>: >=20 >=20 > 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? >=20 > I did find a post to this list from 2014: >=20 > = https://lists.freebsd.org/pipermail/freebsd-fs/2014-October/020307.html >=20 > but I don't think it is relevant, and in any case it does not appear = that the feature that post describes was implemented. >=20 > Thanks, >=20 AFAIK, snapshots are still read-only. BTRFS seems to have writable snapshots - but I=E2=80=99ve no idea how it = actually works. I would suggest to change your contracts - that will be much easier than = changing ZFS.
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