Plans for BTRFS in Fedora
mzerqung at 0pointer.de
Thu Feb 24 13:25:26 UTC 2011
On Wed, 23.02.11 21:29, Chris Ball (cjb at laptop.org) wrote:
> Hi Lennart,
> > My hope is that one day we can ship a read-only root dir by
> > default, or more specifically a btrfs file system with three
> > subvolumes in it: one read-only one mounted to /, and two
> > writable ones mounted to /home and /var, with /tmp mounted from
> > tmpfs.
> I can see the motivation for having root be read-only if you *aren't*
> using btrfs, but if we have a btrfs subvolume for the rootfs which is
> snapshotted every time we perform a package/admin operation (and
> perhaps also just on regular intervals for good measure), what would
> we then gain by adding a read-only rootfs to the mix?
Security, robustness: you can be sure that nothing tempers with your
basic OS tree and it is always in a defined state, unless put in a
specific "admin mode", where the image may be changed/administered,
i.e. / is remounted rw.
Lennart Poettering - Red Hat, Inc.
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