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=E2=80=99t you use quot= as/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: >=20 > =EF=BB=BFThe =E2=80=9Ceasy=E2=80=9D solution is to give each user (or grou= p / project) their own ZFS filesystem. Then the =E2=80=9C.zfs=E2=80=9D direc= tory would be inside the users own $HOME and you can set $=08HOME to 0700=E2= =80=A6. >=20 > That is what we are doing. Granted it generates a =E2=80=9Cfew=E2=80=9D fi= lesystems (like some 20000 per server (we have around 120k users), and then a= dd hourly snapshots to each as =E2=80=9Cicing=E2=80=9D on the cake). Mountin= g all those takes a bit of time - but luckily with the latest FreeBSD releas= e things are much faster these days :-) >=20 > There are some other issues with that - like 100% full filesystems causing= severe system slowdown during writes=E2=80=A6 So you really wanna have some= monitoring system that warns for that. >=20 > - Peter >=20 >=20 >>=20 >> 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: >=20 >=20 > _______________________________________________ > 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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