Utilities to Test Gigabit Ethernet

Utilities to Test Gigabit Ethernet
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Subject Author Date
Utilities to Test Gigabit Ethernet Will 07-25-2006
Posted by Will on July 25, 2006, 2:39 am
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We are putting in gigabit ethernet. In trying to test the speed of the
links in individual rooms, it quickly became apparent that we are
bottlenecked on things like the speed of the hard drive that receives the
files being copied from a server. We never got utilization much above
19%, with occasional periods of 0% between the peaks on a long copy.

Does anyone make a utility that will allow two computers connected through a
gigabit ethernet infrastructure to saturate the pipe in order to test the
actual capacity and throughput of the gigabit network? I assume this
would be some kind of peer to peer application that would just exchange
specific repeatable byte sequences between the two computers from memory,
never using disk.

--
Will



Pure Networks
Posted by William P.N. Smith on July 25, 2006, 9:02 am
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>We are putting in gigabit ethernet. In trying to test the speed of the
>links in individual rooms, it quickly became apparent that we are
>bottlenecked on things like the speed of the hard drive that receives the
>files being copied from a server. We never got utilization much above
>19%, with occasional periods of 0% between the peaks on a long copy.

That's about all I get with reasonably modern WinDoze machines on a
gigabit segment.

>Does anyone make a utility that will allow two computers connected through a
>gigabit ethernet infrastructure to saturate the pipe in order to test the
>actual capacity and throughput of the gigabit network?

ttcp, or the WinDoze version ttcpw

[I hope this isn't the only qualification you are doing on your new
network...]

Posted by Walter Roberson on July 25, 2006, 9:38 am
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>Does anyone make a utility that will allow two computers connected through a
>gigabit ethernet infrastructure to saturate the pipe in order to test the
>actual capacity and throughput of the gigabit network?

Someone mentioned ttcp already. You could also use the effective
replacement, netperf .

Posted by Rick Jones on July 25, 2006, 12:57 pm
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>>Does anyone make a utility that will allow two computers connected
>>through a gigabit ethernet infrastructure to saturate the pipe in
>>order to test the actual capacity and throughput of the gigabit
>>network?

> Someone mentioned ttcp already. You could also use the effective
> replacement, netperf .

http://www.netperf.org/

Two choices - if you just want individual connection results between a
pair of machines go with "netperf2"

http://www.netperf.org/svn/netperf2/trunk

If you want to run multiple, aggregate, synchronized connections go
with "netperf4"

http://www.netperf.org/svn/netperf4/trunk

Either should be able to compile on just about anything - Windows,
Unix, Linux etc. If you run into difficulty there is the netperf-talk
mailing list hosted on netperf.org.

happy benchmarking,

rick jones
--
firebug n, the idiot who tosses a lit cigarette out his car window
these opinions are mine, all mine; HP might not want them anyway... :)
feel free to post, OR email to rick.jones2 in hp.com but NOT BOTH...

Posted by Robert Redelmeier on July 25, 2006, 2:07 pm
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> Does anyone make a utility that will allow two computers
> connected through a gigabit ethernet infrastructure to
> saturate the pipe in order to test the actual capacity and
> throughput of the gigabit network? I assume this would
> be some kind of peer to peer application that would just
> exchange specific repeatable byte sequences between the
> two computers from memory, never using disk.

ttcp

-- Robert



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