Date: Sun, 09 Nov 2014 14:34:45 +0000 From: Arthur Chance <freebsd@qeng-ho.org> To: Matthew Seaman <matthew@FreeBSD.org>, freebsd-questions@freebsd.org Subject: Re: Where do user files go these days? Message-ID: <545F7B85.1050900@qeng-ho.org> In-Reply-To: <545F5AD6.6000404@FreeBSD.org> References: <545ED36B.8040207@gmail.com> <20141109035011.a3fea3b3.freebsd@edvax.de> <545EF01A.8020804@gmail.com> <20141109064453.2451a5ab.freebsd@edvax.de> <545F5AD6.6000404@FreeBSD.org>
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On 09/11/2014 12:15, Matthew Seaman wrote: > On 09/11/2014 05:44, Polytropon wrote: >>> Thanks. In every system I can remember, /home was a separate file >>>> system (when it existed at all), and I didn't see /usr/home in hier(7), >>>> so I wondered. > >> Correct; "man hier" doesn't mention it because it's >> a "user thing" mostly, as the OS and system services >> do not use it (or require it to function properly). >> Sharing /usr with home as one partition is (in most >> cases) less critical than putting all "functional >> subtrees" into one and the same partition, so some >> disk-filling "runaway process" could stop /tmp, /var >> and even / from working properly... > > I do wonder about the layout generated for home directories by the > installer nowadays. It is the case that everything expects user home > directories to be in /home/username -- except for the layout in the > installer. > > Now, moving /home into /usr/home and making a compatibility symlink > might make sense for some partitioning schemes with UFS, but it > certainly doesn't when installing with ZFS or with an all-in-one style > UFS partition. It's not like we're constrained in the number of > partitions we can put on one drive in anything like the same way in > these days of GPT either. > > In fact, having a zroot/usr/home makes managing boot environments more > complex than it needs to be -- you'ld want /usr/bin and /usr/lib and > almost certainly /usr/local to be part of a BE, but not /usr/home. > Having a zroot/home mounted as /home makes so much more sense. > > Don't get me started though -- there are worse problems with managing > what should be in a B.E. and what should not, and trying to reconcile > all that with hier(7). Much of /var should be part of a B.E., but not > /var/mail or /var/log or /var/db/mysql. Similarly /usr/local/pgsql > should be outside a B.E. This leads to all sorts of arcane trickery > like creating a zroot/var ZFS with canmount=off,mountpoint=/var to > overlay zroot/ROOT/BENAME/var with canmount=on,mountpoint=/var all so > you can mount zroot/var/mail from outside the boot environment. I'm glad to find it's not just me who wondered about /var and boot environments. I've got /var/tmp, /var/crash and /var/db/entropy outside the b.e. as well, although with hindsight I'm not sure about crash.
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