Very bad performance when copying large files from windows to
Christopher R. Hertel
crh at umn.edu
Mon Apr 15 08:00:02 GMT 2002
David Collier-Brown wrote:
> "Christopher R. Hertel" wrote:
> > be 'rabbit pellet' transfer we dug into a while back?
> > If so, using security=server should also be avoided to avoid the
> > problem.
> > The problem in this case (for the rest of our viewers) is that
> > Windows Explorer (the GUI) detects subtle timing delays and will
> > slow itself down. It sends the file using small packets, sends a
> > flush after each packet, and requires an ACK after each write and
> > each flush.
> Just out of curiosity, what did security=server contribute:
> added latency in some obscure part of the process???
As far as we could tell... yes. ;)
I really should have documented that whole episode.
Christopher R. Hertel -)----- University of Minnesota
crh at nts.umn.edu Networking and Telecommunications Services
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