network utilization 60%...can i get more??

[Brian]

im tranferring large files from 1 xp pro machine to another via
crossover cable. these pc's are not hooked up to any other network
device. my nic's are 100mbps. i know the theorectical max xfer rate for
100base T is 12.5 MB/s but I only seem to max out at 7 MB/s with 60-70%
network utilization. I dont have any other processes or anything else
eating cpu time. is there any way to get 100% utilization out of a file
transfers and obtain the max 12.5 MB/s xfer rate?

 

[Richard G. Harper]

Probably not - 60% is a pretty good utilization rate.

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[Hans-Georg Michna]

im tranferring large files from 1 xp pro machine to another via
crossover cable. these pc's are not hooked up to any other network
device. my nic's are 100mbps. i know the theorectical max xfer rate for
100base T is 12.5 MB/s but I only seem to max out at 7 MB/s with 60-70%
network utilization. I dont have any other processes or anything else
eating cpu time. is there any way to get 100% utilization out of a file
transfers and obtain the max 12.5 MB/s xfer rate?

Brian,

well designed network adapters will easily reach 11 to 12 MB/s.
In fact, anything less points squarely at a defect or at a low
quality component.

The most common causes of lower throughput is that your data
source and sink are not as fast. How fast are your hard disks,
particularly when they write?

You can test your network throughput by writing a looping batch
file that keeps copying the same file of some 1 MB in size to
the same destination. After a few cycles the file will be in the
disk cache, so the disk will no longer limit the speed. Of
course this works only if the receiving disk has an active write
cache that is big enough. I'm not sure whether the Windows cache
caches large chunks of write data. Have never tested that, as
all hard disks I use have an enabled write cache.

Another cause for lower throughput is that the network adapter
issues too many interrupts and the interrupt reaction routine
uses too much processor time. You can test this by firing up
Task Manager (press Ctrl + Shift + Esc) and looking at the
processor load. Activate kernel times. You will then see the
interrupt load in red. It should be much less than 50%.

Hans-Georg

 

[Guest]

I've tried using Mandrake 10.1 samba, u will get 80-90%..

Or try the tiny NASlite from http://www.serverelements.com/naslite.php
It will give 90% utilization. BUT dont try with file over 100MB, naslite got
bugs with large file.

Is there anyone care to tune windows' filesharing to >60% util. ? Or
windows' filesharing just sux??

Probably not - 60% is a pretty good utilization rate.

--
Richard G. Harper [MVP Shell/User] (e-mail address removed)
* PLEASE post all messages and replies in the newsgroups
* for the benefit of all. Private mail is usually not replied to.
* My website, such as it is ... http://rgharper.mvps.org/
* HELP us help YOU ... http://www.dts-l.org/goodpost.htm

im tranferring large files from 1 xp pro machine to another via crossover
cable. these pc's are not hooked up to any other network device. my nic's
are 100mbps. i know the theorectical max xfer rate for 100base T is 12.5
MB/s but I only seem to max out at 7 MB/s with 60-70% network utilization.
I dont have any other processes or anything else eating cpu time. is there
any way to get 100% utilization out of a file transfers and obtain the max
12.5 MB/s xfer rate?

 

[Guest]

Try use win98 copy files from xp, u will get 90% utilization...

There must be some bug with XP's serverlanman??