10 gigabit Ethernet - Add on question

[Jim Hall]

The PRO/10Gb (82597EX) card I doubt is LLE or RDMA capable (PCI-X). I think it is plain vanilla 10Gb with some stateless offload capabilities. 

The NetXen cards look to be Low Latency and RDMA capable as well as full TOE (though the linux people don't like this... for 10Gb you need it now.) This tech is commonly referred to as iWARP (Internet at WARP speed).

You could use a Force10 or Foundry switch in my experience to get 10Gb. How much are you willing to spend!!

Are you planning on passing Jumbo Frames?

I am doing an evaluation of many 10Gb technologies right now and will be running quite a few tests to determine which cards are best suited for our environment. Chelsio, NetEffect, Tehuti, Sun CMT, Intel XF, Myri, Neterion, and NetXen are some of the cards we are doing a paper eval on now. In a few weeks we hope to do a full eval. Unfortunately we won't be focusing too much on iWARP at this time, we look to do that when we get some LLE switches in and re-run the tests. In theory 10Gbe with iWARP and LLE switches should provide similar performace to Infiniband.

--Jim

----- Original Message ----
From: Stephen Anderson <anderson.stephen at gmail.com>
To: linux-poweredge at dell.com
Sent: Friday, January 11, 2008 1:25:12 PM
Subject: Re: 10 gigabit Ethernet - Add on question


On 1/11/08, Sitsofe Wheeler <sitsofe at yahoo.com> wrote:
> Matthias Saou wrote:
>
> > This is true for "raw" network traffic, because limits quickly
 depend
> > on what and how you transfer. My testings on some brand new dual
 quad
> > core PE1950 III servers (E5410 @ 2.33GHz w/ 6MB cache) show for
> > instance that an rsync/ssh transfer from one to the other maxes out
 at
> > 50MB/s because that corresponds to one ssh process taking 100% of
 one
> > of the 8 cores. This is one of those cases where pure MHz power
> > would be more useful than having so many cores :-)
>
> Was that with the default 3des or with the allegedly lighter blowfish
> cipher? Does changing ciphers make any real difference?
>

Since this thread concerns 10 gigabit Ethernet, which switches can be
used to interconnect a small cluster of systems (<10) using the
PRO/10Gbe CX4 cards availbale on the 2950 III?

I saw a reference to a Dell power connect switch in a earlier thread,
but that switch doesn't seem to be available at the dell website. I
have not used 10 gigabit Ethernet before, but it seems to provide the
low latency that we are looking for.

thanks

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