Measuring network speed DURING a transfer

On a RS/6000 running AIX 4.3 or higher, is there a command that can be
run that provides a measurement of the CURRENT traffic on the network
card (ent0)?

Let's say I am transferring a large file by FTP between ServerA and
ServerB, and the ent0 cards on each box are not being used for any
other traffic. Is there a way to list (on an interval of 3 seconds for
example) the specific transfer rate I am getting on the ethernet card?

What we presently do is transfer a 10MB file between the two servers
and then check the FTP statistics at the end of the transfer (how many
seconds it took, what was the listed Kbytes/Sec). But if I wanted to
see if the transfer rate was faster at some point or slower at others
on a data transfer that takes 4 minutes, is that possible?

I was reviewing entstat and netstat but that doesn't seem to have what
I'm looking for. Would netmon do this?

Thx,

Steve

On Oct 16, 2:29 pm, steven_nospam at Yahoo! Canada
<steven_nos...@yahoo.ca> wrote:[color=blue]
> On a RS/6000 running AIX 4.3 or higher, is there a command that can be
> run that provides a measurement of the CURRENT traffic on the network
> card (ent0)?
>
> Let's say I am transferring a large file by FTP between ServerA and
> ServerB, and the ent0 cards on each box are not being used for any
> other traffic. Is there a way to list (on an interval of 3 seconds for
> example) the specific transfer rate I am getting on the ethernet card?
>
> What we presently do is transfer a 10MB file between the two servers
> and then check the FTP statistics at the end of the transfer (how many
> seconds it took, what was the listed Kbytes/Sec). But if I wanted to
> see if the transfer rate was faster at some point or slower at others
> on a data transfer that takes 4 minutes, is that possible?
>
> I was reviewing entstat and netstat but that doesn't seem to have what
> I'm looking for. Would netmon do this?
>
> Thx,
>
> Steve[/color]

nmon will do this
use the n key to show network adapters

On 16 Okt., 20:29, steven_nospam at Yahoo! Canada
<steven_nos...@yahoo.ca> wrote:[color=blue]
> On a RS/6000 running AIX 4.3 or higher, is there a command that can be
> run that provides a measurement of the CURRENT traffic on the network
> card (ent0)?
>
> Let's say I am transferring a large file by FTP between ServerA and
> ServerB, and the ent0 cards on each box are not being used for any
> other traffic. Is there a way to list (on an interval of 3 seconds for
> example) the specific transfer rate I am getting on the ethernet card?
>
> What we presently do is transfer a 10MB file between the two servers
> and then check the FTP statistics at the end of the transfer (how many
> seconds it took, what was the listed Kbytes/Sec). But if I wanted to
> see if the transfer rate was faster at some point or slower at others
> on a data transfer that takes 4 minutes, is that possible?[/color]
Yes
....
You can use entstat or netstat and reset the traffic counter to start
your measurement or use nmon as noted.

hth
Hajo

On Oct 16, 2:54 pm, "aixd...@yahoo.com" <aixd...@yahoo.com> wrote:[color=blue]
> On Oct 16, 2:29 pm, steven_nospam at Yahoo! Canada
>
>
>
>
>
> <steven_nos...@yahoo.ca> wrote:[color=green]
> > On a RS/6000 running AIX 4.3 or higher, is there a command that can be
> > run that provides a measurement of the CURRENT traffic on the network
> > card (ent0)?[/color]
>[color=green]
> > Let's say I am transferring a large file by FTP between ServerA and
> > ServerB, and the ent0 cards on each box are not being used for any
> > other traffic. Is there a way to list (on an interval of 3 seconds for
> > example) the specific transfer rate I am getting on the ethernet card?[/color]
>[color=green]
> > What we presently do is transfer a 10MB file between the two servers
> > and then check the FTP statistics at the end of the transfer (how many
> > seconds it took, what was the listed Kbytes/Sec). But if I wanted to
> > see if the transfer rate was faster at some point or slower at others
> > on a data transfer that takes 4 minutes, is that possible?[/color]
>[color=green]
> > I was reviewing entstat and netstat but that doesn't seem to have what
> > I'm looking for. Would netmon do this?[/color]
>[color=green]
> > Thx,[/color]
>[color=green]
> > Steve[/color]
>
> nmon will do this
> use the n key to show network adapters- Hide quoted text -
>
> - Show quoted text -[/color]

Thanks guys for responding. I downloaded and tried the nmon and it
seems to be exactly what I was looking for.

Steve

On Oct 17, 7:29 am, steven_nospam at Yahoo! Canada
<steven_nos...@yahoo.ca> wrote:[color=blue]
> On a RS/6000 running AIX 4.3 or higher, is there a command that can be
> run that provides a measurement of the CURRENT traffic on the network
> card (ent0)?
>
> Let's say I am transferring a large file by FTP between ServerA and
> ServerB, and the ent0 cards on each box are not being used for any
> other traffic. Is there a way to list (on an interval of 3 seconds for
> example) the specific transfer rate I am getting on the ethernet card?
>
> What we presently do is transfer a 10MB file between the two servers
> and then check the FTP statistics at the end of the transfer (how many
> seconds it took, what was the listed Kbytes/Sec). But if I wanted to
> see if the transfer rate was faster at some point or slower at others
> on a data transfer that takes 4 minutes, is that possible?
>
> I was reviewing entstat and netstat but that doesn't seem to have what
> I'm looking for. Would netmon do this?
>
> Thx,
>
> Steve[/color]

create a variable for the time started - perl -le 'print time'
calculate the size of the file
# please tell me you DON'T actually use FTP
file transfer runs
recalculate above
do the maths

steven_nospam at Yahoo! Canada <steven_nospam@yahoo.ca> wrote:[color=blue]
> On a RS/6000 running AIX 4.3 or higher, is there a command that can
> be run that provides a measurement of the CURRENT traffic on the
> network card (ent0)?[/color]
[color=blue]
> Let's say I am transferring a large file by FTP between ServerA and
> ServerB, and the ent0 cards on each box are not being used for any
> other traffic. Is there a way to list (on an interval of 3 seconds
> for example) the specific transfer rate I am getting on the ethernet
> card?[/color]

If your goal is to see what the network can do between ServerA and
ServerB, FTP may not be the right tool for the job. I would of course
suggest netperf, configured with --enable-demo:

configure --enable-demo

and then run something like a TCP_STREAM test with the global -D
option:

raj@tardy:~/netperf2_trunk/src$ ./netperf -H hpcpc105 -D 1.0 -l 12
TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to hpcpc105.cup.hp.com (16.89.84.105) port 0 AF_INET : demo
Interim result: 93.26 10^6bits/s over 1.06 seconds
Interim result: 82.22 10^6bits/s over 1.14 seconds
Interim result: 84.56 10^6bits/s over 1.01 seconds
Interim result: 78.15 10^6bits/s over 1.08 seconds
Interim result: 73.98 10^6bits/s over 1.06 seconds
Interim result: 74.59 10^6bits/s over 1.01 seconds
Interim result: 76.20 10^6bits/s over 1.00 seconds
Interim result: 76.81 10^6bits/s over 1.00 seconds
Interim result: 72.37 10^6bits/s over 1.06 seconds
Interim result: 77.58 10^6bits/s over 1.00 seconds
Interim result: 70.85 10^6bits/s over 1.09 seconds
Recv Send Send
Socket Socket Message Elapsed
Size Size Size Time Throughput
bytes bytes bytes secs. 10^6bits/sec

87380 16384 16384 12.04 77.57

where the value you pass with -D is how many seconds you would like
between updates.

If the goal is to just look at what is "naturally" happening on the
system, then netperf isn't the way to go.

rick jones
--
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There's only yourself. The belief is in your own precision. - Jobert
these opinions are mine, all mine; HP might not want them anyway... :)
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