On Tue, 18 Sep 2012, Erik Ableson wrote:

The bigger issue you'll run into will be data sizing as a year's worth of snapshot basically means that you're keeping a journal of every single write that's occurred over the year. If you are running

The above is not a correct statement. The snapshot only preserves the file-level differences between the points in time. A snapshot does not preserve "every single write". Zfs does not even send every single write to underlying disk. In some usage models, the same file may be re-written 100 times between snapshots, or might not ever appear in any snapshot.

Bob Friesenhahn
bfrie...@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/
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