[Beowulf] 10 GbE vs. Trunked 1 GbE performance?

[Jack C]

Steve,

Depends on your app. Trunking just allows alternate paths for data: you're
not going to be able to push 4 Gb/s over a single link on that bond. Rather,
if you have multiple connections all firing data around, you can approach
that bandwidth or 4 gigs/s.

So: if you're pushing huge arrays of data around not very often, 10 GbE will
be much faster, but if you're throwing a zillion smaller sized messages to
lots of different hosts at once, you will definatly get some usage out of
that trunk. At least, this is how I understand it.

-Jack Carrozzo


On 7/3/07, Steve Cousins <cousins at umit.maine.edu> wrote:
>
>
> We are purchasing a NAS NFS server for our cluster and I'm wondering if a
> 10 GbE card would give us twice the performance than say 4 trunked 1 GbE
> lines.  Given that the NAS itself has the performance to drive this, do
> any of you have real-world numbers comparing this sort of thing?
>
> Thanks,
>
> Steve
>
> --
> ______________________________________________________________________
>   Steve Cousins, Ocean Modeling Group    Email: cousins at umit.maine.edu
>   Marine Sciences, 452 Aubert Hall       http://rocky.umeoce.maine.edu
>   Univ. of Maine, Orono, ME 04469        Phone: (207) 581-4302
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