Overlapping i/o requests is a time-honored approach to improving performance.
On the other hand...
At 12:34 PM 10/22/94, Brian Behlendorf wrote:
>you are totally optimizing for people on the slow end of a 14.4 modem,
overlapping doesn't always help.
My eperience living on the end of a 14.4 modem suggests that MAYBE two
simultaneous transfers work well, but I don't think so. Certainly not
more.
The problem is that the congestion control mechanisms in TCP aren't
sufficiently sensitive to "coordinate" the consumption of such a small
pipe.
d/
--------------------
Dave Crocker
Brandenburg Consulting Phone: +1 408 246 8253
675 Spruce Dr. Fax: +1 408 249 6205
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