Re: Differential Backups

On Mon, 29 Oct 2001, Paul Tomblin wrote:

> Quoting Alvaro Herrera (alvherre@atentus.com):
> > > Interesting idea.  The one thing I might worry about is that 'diff'
> > > might (I'm not familiar with its algorithm) eat a great deal of memory
> > > if the dumps you're comparing are very large and significantly
> > > different.
> >
> > GNU diff reads in memory both files. You sure need lots to compare
> > medium sized databases, and I don't think this method will work on big
> > ones.
>
> Doesn't GNU diff have the "-h" option?

No, at least in my version of it (2.7, which appears to be the latest in
my local mirror of GNU). What's that supposed to do? In fact, the help
text says

       -h     This  option currently has no effect; it is present
              for Unix compatibility.

--
Alvaro Herrera (<alvherre[@]atentus.com>)
"Hay quien adquiere la mala costumbre de ser infeliz" (M. A. Evans)