Re: calculating throughput and maximizing

netkid12@xxxxxxxxx wrote:

Hi, I have a network setup with a netgear router with a built-in
switch. The PC attached to the switch is operating at 100Mb/s Full
Duplex. All other PC's are connected via a hub to this switch. They are
operating at 10Mb Half duplex. I try to copy files between workstations
via mapping the drive etc and its really slow. Can someone please help
me in trying to understand why its slow.

First remember that it is 10 megabits/second, so about 1.2 megabytes/second. 1.0 megabytes/second is fairly close.

How to get the actual speed?

You need a large enough file to avoid startup overhead, and also
the effect of file caching. Most ftp clients give timing values,
but you can also time it with a clock or watch. 100 megabytes
should take about 100s.

I have asked around and have been told that the network will never
operate at 10Mb but will operate at a lot less. Why is that? Could
someone please point me to some resources where I can read up on why a
10Mb network will never operate 10Mb.

A fairly modern processor should come close to 1 megabyte/second, assuming the disk is fast enough. I have seen Windows systems
that ran much slower than they should for no known reason with
some software/hardware combinations, usually one direction only.
If you can't get 0.5 megabytes/second with hardware less than
a few years old, something is wrong.

-- glen

.

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