RFC: Btrfs snapshots feature for F13
cjb at laptop.org
Tue Nov 17 14:52:13 UTC 2009
> It'd be great to get feedback on whether this is the right idea,
> and how exactly the UI interaction should work, before submitting
> this formally.
Some off-list feedback so far:
* People want independent active snapshots per filesystem (i.e. btrfs
/home is the live filesystem, and btrfs / is an older snapshot),
which makes sense but makes the UI more complex since it'll have
to show a list of (filesystem, snapshot) tuples.
* Ray says not to invent a new system-config-blah, and instead to talk
with davidz about Palimpsest. David, what do you think?
* Several people think that the ZFS Time Slider patches to nautilus¹
look good, and want that for btrfs. Sounds plausible², but I'm
personally less interested in file versioning via snapshots and
more interested in working on ways to let developers feel
comfortable upgrading to Rawhide daily, for the next release.
* Someone on the feature's Talk Page suggests that we should encourage
people using anaconda to create a btrfs rootfs separate to their
/home, so that they can rollback rootfs snapshots without affecting
their homedir. Could work; maybe an anaconda dialog that says "hey,
I see you're choosing btrfs, we're going to turn on snapshots and we
suggest you use a separate /home partition".
Any more thoughts?
²: It's a bit awkward; you have to do a mount on each snapshot to be
able to show the directory listing for it, but it appears that's
what ZFS/Time Slider does already, so it won't be any worse..
Chris Ball <cjb at laptop.org>
One Laptop Per Child
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