dillon at apollo.backplane.com
Sat Oct 11 18:10:34 UTC 2008
: since 'small' nowadays is big enough to hold /, what advantages are there
:in having root split up?
:also, having this split personality, what if the disk goes? the hammer/zfs
:is probably raided ...
You mean /boot + root , or do you mean /root vs /usr vs /home? I'll
With regards to /boot + root. A small separate /boot partition
(256m) allows your root filesystem to use an arbitrarily complex
topology. e.g. multiple geom layers, weird zfs setups, etc. So
you get flexibility that you would otherwise not have if you went
with a directly-bootable ZFS root.
/boot can be as complex as boot2 allows. There's nothing preventing
it from being RAIDed if boot2 supported that, and there's nothing
preventing it (once you had ZFS boot capabilities) from being ZFS
using a topology supported by boot2. Having a sparate /boot allows
your filesystem root to use topologues boot2 would otherwise not
With regards to the traditional BSD partitioning scheme, having a
separate /usr, /home, /tmp, etc... there's no reason to do that stuff
any more with ZFS (or HAMMER). You just need one, and can break it
down into separate management domains within the filesystem
(e.g. HAMMER PFS's). That's a generic statement of course, there
will always be situations where you might want to partition things
Most linux dists don't bother with multiple partitions any more.
They just have '/' and maybe a small boot partition, and that's it.
<dillon at backplane.com>
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