On May 11 2016, Theodore Ts'o <ty...@mit.edu> wrote:
> On Mon, May 09, 2016 at 10:21:21AM -0700, Nikolaus Rath wrote:
>> > Another way is to use btrfs (or zfs or perhaps LVM snapshots): whenever
>> > something goes south in a way that's not trivial to recover, you can
>> > restore with a couple commands and reboot. And if unbootable because,
>> > for example, someone removed support for your CPU, you boot with
>> > subvol=backups/sys-2016-05-07.
>>
>> I'd advise against using LVM snapshots. The time for initial activation
>> seems to go up exponentially with the amount of data in snapshot
>> volumes. I think they are only intended for short-term use
>> (e.g. to take a backup).
>
> If what you want to do is a rollback operation after a package
> installation goes badly, LVM snapshots are sufficient.
Yes, sorry, I didn't make that clear. I was picking up on the
"backups/sys-2016-05-07" example, where the nomeclature seems to imply
that there are a lot of such snapshots.
Best,
-Nikolaus
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