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Bug#679853: general: Too much downtime during a big dist-upgrade - avoidable with snapshots



Alexander,

am Mon, Jul 02, 2012 at 11:11:51AM +0600 hast du folgendes geschrieben:
> 1) The installer should be able to install the system to a btrfs
> subvolume (except /home and /var, which should be on separate
> subvolumes).
> 
> 2) On such system, dpkg and apt/aptitude, if requested by the user
> and/or by default, should make a writeable snapshot of the root
> subvolume, mount it to some temporary location, chroot into it and
> perform the upgrade there. During this process, the main system will,
> of course, continue to work.

it is not sufficient on a Debian system to just branch off the root filesystem
given that important state information of the package manager is stored in
/var.

Of course somebody could port the Nexenta snapshotting method (with ZFS) to
Debian proper with btrfs...

Kind regards
Philipp Kern

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