Date: Thu, 7 Nov 2019 18:31:31 -0600 From: Chris Watson <bsdunix44@gmail.com> To: Peter Eriksson <pen@lysator.liu.se> Cc: Jan Behrens <jbe-mlist@magnetkern.de>, freebsd-fs@freebsd.org Subject: Re: ZFS snapdir readability (Crosspost) Message-ID: <65AE896D-A32E-451A-B9D0-EC40D438BB03@gmail.com> In-Reply-To: <FBB088B0-CE5C-45DC-8F2F-0D0AA2703846@lysator.liu.se> References: <FBB088B0-CE5C-45DC-8F2F-0D0AA2703846@lysator.liu.se>
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Peter, on your last point about 100% utilization, don’t you use quotas/user quotas to prevent that? Chris Sent from my iPhone > On Nov 7, 2019, at 4:06 PM, Peter Eriksson <pen@lysator.liu.se> wrote: > > The “easy” solution is to give each user (or group / project) their own ZFS filesystem. Then the “.zfs” directory would be inside the users own $HOME and you can set $HOME to 0700…. > > That is what we are doing. Granted it generates a “few” filesystems (like some 20000 per server (we have around 120k users), and then add hourly snapshots to each as “icing” on the cake). Mounting all those takes a bit of time - but luckily with the latest FreeBSD release things are much faster these days :-) > > There are some other issues with that - like 100% full filesystems causing severe system slowdown during writes… So you really wanna have some monitoring system that warns for that. > > - Peter > > >> >> I recently noticed that all ZFS filesystems in FreeBSD allow access to >> the .zfs directory (snapdir) for all users of the system. It is >> possible to hide that directory using the snapdir option: > > > _______________________________________________ > freebsd-fs@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-fs > To unsubscribe, send any mail to "freebsd-fs-unsubscribe@freebsd.org"
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