On Tue, 1 Sep 2009 17:51:27 -0400
Blake <blake.irvin at gmail.com> wrote:
> On Tue, Sep 1, 2009 at 5:29 PM, Mike Meyer
> <mwm-keyword-opensolaris.649b73 at mired.org> wrote:
> >
> > Apple
> > provides a nice user interface with their "time machine" technology,
> > except - well, they do backups instead of snapshots, which requires a
> > separate disk (which gives them a plus for being useful if the data
> > disk fails), but take more time and uses a proprietary format on disk
> > that's opaque to anything but their software.
>
> This is actually not true - they just put a bunch of copies of your
> data on an external drive. ?The code for the program that manages this
> is proprietary, if that's what you meant.
Actually, I meant that I hadn't been able to make head nor tail of the
data they put on a time machine volume. I confess I didn't try very
hard - it certainly wasn't as accessible as any kind of snapshot I've
ever dealt with.
> Still, zfs snapshots are a lot more efficient and faster than Time
> Machine (about a second for each snap, instead of 30 min in the cast
> of a Time Machine backup I did today :(
Yup. ZFS snapshots make this easy enough that a number of blogs had
"rolling snapshot" scripts, and probably lots of people wrote their
own (I know I did).
<mike
--
Mike Meyer <mwm at mired.org> http://www.mired.org/consulting.html
Independent Network/Unix/Perforce consultant, email for more information.
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