Re: 100Mbps Ethernet Speed/Efficiency

From: dalen (dalen_at_czexan.net)
Date: 04/07/04

  • Next message: Jeff Vian: "Re: wget lot of files" 
    Date: Tue, 06 Apr 2004 17:00:04 -0500
To: Neall <neall@haughtmail.com>, For users of Fedora Core releases <fedora-list@redhat.com>

    Neall wrote:
    > I took the hard drives out of the picture. I set up RAM disks on two
    > different systems, and connected them via ethernet using NFS to cross
    > mount them. Then, I copied from the first system's RAM disk over
    > ethernet, to the second system's RAM disk. Granted, NFS is in the
    > picture, but it would be using hard drives, too.

    > 1000/T: 69.9 MByte/Sec.

    I am getting about the same with Intel Gb nics via ttcp.

    [root@ecae4 root]# ttcp -t -s -f M -n 100000 -p 80 ecae5
    ttcp-t: buflen=8192, nbuf=100000, align=16384/0, port=80 tcp -> ecae5
    ttcp-t: socket
    ttcp-t: connect
    ttcp-t: 819200000 bytes in 11.85 real seconds = 65.93 MB/sec +++
    ttcp-t: 100000 I/O calls, msec/call = 0.12, calls/sec = 8439.24
    ttcp-t: 0.0user 10.4sys 0:11real 88% 0i+0d 0maxrss 0+2pf 0+0csw 

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