Re: 100Mbps Ethernet Speed/Efficiency

From: WipeOut (wipe_out_at_users.sourceforge.net)
Date: 04/06/04

  • Next message: Andreas.Trawoeger_at_wgkk.sozvers.at: "Re: FC 1.91 & NFS doesn't work" 
    Date: Tue, 06 Apr 2004 11:40:05 +0100
To: For users of Fedora Core releases <fedora-list@redhat.com>

    Ow Mun Heng wrote:

    >Hi Guys,
    >
    >I'm wondering what's the maximum sustained transfer rate
    >that one can experience when using a 100Mbps link?
    >
    >Is there any way that I can determine what's the bottleneck?
    >FYI, I'm using iftop.
    >
    >Transferring files between 2 PCs, (laptop and Desktop)
    >I see like up to 20MB/s.
    >
    >Could this # be limited due to my slow HD? 4200rpm which
    >hdparm -t (or is it -T) gives ~26MB/s
    >
    >1mbps = 1024/8 bits = 1 MB/s (I know there's a conversion
    >but I'm forgetful)
    >
    >
    >Cheers,
    >Mun Heng, Ow
    >
    >
    >
    >
    >
    >
    >
    Without compression and overhead 100Mb/s transtales to about 12.5MB/s..

    Of course that is the theoretical maximum..

    If you add overhead and contention you will probbaly see an actual
    transfer of between 60Mb/s and 90Mb/s..

    I am not sure how you have managed to see a throughput of 20MB/s on a
    100Mb/s link..

    Later.. 

    -- 
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