[TAG] 2c tip: filtering in-place
Jay R. Ashworth
jra at baylink.com
Mon Mar 22 20:32:07 MSK 2004
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. :-)
Jay R. Ashworth jra at baylink.com
Member of the Technical Staff Baylink RFC 2100
The Suncoast Freenet The Things I Think
Tampa Bay, Florida http://baylink.pitas.com +1 727 647 1274
"They had engineers in my day, too." -- Perry Vance Nelson
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