Re: Aggregate network interfaces

From: John-Mark Gurney (gurney_j_at_resnet.uoregon.edu)
Date: 08/26/05

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    Date: Thu, 25 Aug 2005 22:53:43 -0700
To: Dave+Seddon <dave-dated-1125455574.45eb32@seddon.ca>

    Dave+Seddon wrote this message on Fri, Aug 26, 2005 at 12:32 +1000:
    > - Gig cards are cheap.

    yep... $25 for a card, and $100 will get you a 8 port switch that will
    do jumbo frames (MTU sizes of 9000 and more instead of the default
    1500)... and you can even use the same wiring, no need for cat5e, cat5
    works just fine for gige (as long as you wired all four pairs through)...

    > - PCI bus throughput is really bad (like 32MB/s)

    nope, PCI raw bandwidth is 133MB/s... 33.3mhz * 4 bytes/cycle, though some
    of that is lost to command overhead, but you can do 100MB/s on PCI if
    the bridge doesn't interrupt your card too much... The usual problem
    is that the PCI bus bandwidth is shared with your HD, so you'll use
    50MB/sec reading from your HD, and then the other 50MB/sec out the
    gige.. (if you're lucky).. 

    -- 
  John-Mark Gurney				Voice: +1 415 225 5579
     "All that I will do, has been done, All that I have, has not."
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