Full Duplex Lights

Jason Thomas jason@topic.com.au
Thu Jul 22 02:47:28 1999

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okay i tested it using rsync and ssh with compression off and encryption

It was faster but still only about 2M a sec.  that was beetween an ultrasparc
and an AMD K6-350 with scsi drives.  I transferred the same 34MB file.

I think the only explanation is:

1) one card is using 10MB's.
2) the network is really flooded.
3) the machines are really loaded down. - most probable.
4) bad network cables - seems to be a lot of collisions.

Danilo Godec [danci@kibla.org] wrote:
> On Thu, 22 Jul 1999, Jason Thomas wrote:
> > we transferred a 40MB file using scp. which seems to transfer at about 1MB
> > sec.  Shouldn't this be around 12MB sec, at 100Mbits.
> Don't use scp for testing connection speed! scp encrypts data before it is
> send and decrypts it when it is received - and that takes some tome even
> on fast machines.
> For testing the network speed there is a program called 'ttcp' which talks
> directly to the network and doesn't even touch disks (as in my case, the
> network is faster then disk access, that is important) and tells you what
> your network really can do.
> ftp://ftp.sunet.se/pub/network/monitoring/ttcp/
>      D.

Jason Thomas                           Phone:  +61 2 6257 7111
System Administrator                   Fax:    +61 2 6257 7311
tSA Consulting Group Pty. Ltd.         Mobile: 0418 29 66 81
1 Hall Street Lyneham ACT 2602         http://www.topic.com.au/

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