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Re: dump(8) lacks a last-stage incremental dump feature
On Sun, Feb 28, 2010 at 10:15:32PM -0800, Greywolf wrote:
> > I'm not sure I understand exactly what you want, or the point - the
> > intent of the dump levels scheme is that you can do 2^N nightlies
> > before you need to do a level 0, but only keep N dumps around at any
> > given time.
> erm, if you want to do straight incrementals, no, you really can't do that.
> Not everyone dumps 0 1 2 1 3 2. Different people have different ideas about
> what "the right solution" is.
Where by "straight incremental" you mean each dump is exactly the
changes since the previous one, so after a string of them you have to
scan all of them to restore? I suppose not.
> > However, doesn't your patch mess up /etc/dumpdates?
> I fail to see how. It simply dumps at level 9 but refers to the
> previous level 9
> for the requisite files, then updates /etc/dumpdates with this level 9.
Yes, but it's not really a level 9. I'd be inclined to think there
should be a separate 'i' line.
Perhaps nobody ever assumes they can use the information in
/etc/dumpdates to e.g. check which tape a file is probably on, but I
wouldn't count on it.
David A. Holland
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