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Old 06-11-2009, 10:06 PM   #1
sp149
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network card speed


how to do a speed test on my Redhat Enterprise 4 update 4 server.

I've been told that the server is slow and data is being backed up very slowly to the backup server.

the server seems fine and nothing much running on it.

Can someone guide, how do i cross check.


Thanks
 
Old 06-11-2009, 10:21 PM   #2
FragInHell
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ethtool will help you here. It can tell what speed the interface is set to or you can use it to force a speed etc.
 
Old 06-11-2009, 10:53 PM   #3
sp149
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Thankyou ..

I need something for speed testing for the network interface.
 
Old 06-11-2009, 11:37 PM   #4
grepmasterd
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some tools to try
  • netperf
  • iperf
  • netpipe
  • ttcp

they should all give you roughly the same results, so pick your poison.
 
Old 06-12-2009, 12:17 AM   #5
FragInHell
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You can also create a file say 100mb in size (use dd to create a file) and the FTP it from place to place, that will give you an idea of speed as well. Don't use SCP as SSH can use compression.
 
Old 06-12-2009, 12:26 AM   #6
grepmasterd
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scp only uses compression if you tell it to ('-C' flag). and both ftp and scp involve disk access as part of the test.

If you just want to test your nics, use one of the tools above, like netperf (very simple). It only uses memory (fast), system buses (also fast) and and network hardware. If you get good results, it might be a good next step to try ftp or some file-based test to see if file i/o is the point of slowness.
 
Old 06-12-2009, 10:33 AM   #7
sp149
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Thank you ..i will try it and get back..

Appreciate all the help
 
  


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