SMC8624T vs DLINK DGC-1024T / Jumbo Frames ?

Anand Vaidya anand at novaglobal.com.sg
Sun Apr 13 22:44:57 EDT 2003


On Friday 11 April 2003 06:34 pm, rochus.schmid at ch.tum.de wrote:
> dear beowulfers,
>
> we are in a similar situation as dave: we get an 8nodes dual-xeon cluster
> (with tyan e7501 mobo) with intel gige on board. and now the "switch issue"
> comes up. my vendor also suggested the DLINK, whereas i found the
> discussion on the (more expensive managed) SMC on this list supporting
> jumbo frames. the issue was whether or not any of the cheaper (unmanaged)
> switches support jumbo frames. i couldnt figure out if this is resolved,
> yet. it sounded like they might, but since they are unmanaged the problem
> is to switch it on or off. is that right?
>
> i also found this document:
> http://www.scl.ameslab.gov/Publications/ HalsteadPubs/usenix_halstead.pdf

-----------------------------------------

The above URL seems to be outdated. Please use 
http://www.scl.ameslab.gov/Publications/Halstead/usenix_halstead.pdf

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> it says that the effect on bandwith with jumbo frames is only seen for
> tcp/ip commun (netpipe) but is completely lost using MPI. since my code is
> MPI based it wouldn't matter to have jumbo frames and i could go with the
> cheaper DLINK. is this info right? or outdated? missunderstood?
>
> any hints highly appreciated.
>
> greetings
>
>    rochus
>
> Quoting Dave Lane <dlane at ap.stmarys.ca>:
> > Can anyone comment on the strengths/weaknesses of these two 24-port
> > gigabit
> > switches. We're going to be building a 16 node dual-Xeon cluster this
> > spring and were planning on the SMC switch (which has received good
> > review
> > here before), but a vendor pointed out the DLINK switch as a less
> > expensive
> > alternative.
> >
> > ... Dave
>
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