[TAG] 2c tip: filtering in-place

[Jay R. Ashworth]

On Mon, Mar 22, 2004 at 11:40:19AM -0500, Ben Okopnik wrote:
> > The target side dd is doing *random access*.
> >
> > It writes the blocks sequentially, but it writes them *into* the
> > standing file, one at a time, without touching the blocks around them.  
> > Likewise on the read side.  The killer is the *redirection*, which his
> > approach does not use, at all.  Not the pipe.
>  
> AH. I hadn't realized that. In that case, I agree; there's a large
> difference. I've just tried it on a 100MB file I've made up for the
> purpose, and it seems that you're right.

I thought it was an incredibly clever approach that I should have
though of 20 years ago.  :-)

Cheers,
-- jra
-- 
Jay R. Ashworth                                                jra at baylink.com
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        "They had engineers in my day, too."  -- Perry Vance Nelson