Any idea what is difference between IPoIB and IB? If I use openib (which comes with default RHEL) is it IPoIB? and if I use Mellanox MLNX installation , is it IB alone?

Please clarify.

As of now I am trying to remove Mellanox and trying installing back openib? Let see if I can make it work.

On Tue, May 7, 2013 at 7:40 PM, Mi Zhou <mi.zhou@stjude.org> wrote:

Hi,

We are using QDR, CentOS 6.2 and openib, it shows 40gpbs. Hope this helps.

Mi

On 05/07/2013 09:00 AM, linux freaker wrote:

Charles,
How shall I install open ib back which comes with default Rhel. Did anyone tried using openib with 40 gbps speed? Is it known issue.? I tried using it but it just shows 10gbps.How to bring it to 40gbps.

On 7 May 2013 19:00, "Charles Taylor" <taylor@hpc.ufl.edu> wrote:

Touche!   We are being forced to use the Mellanox/OFED stack now to support our new FDR IB cards and it *is* painful.   We have a meeting with Mellanox today to give them "what for" (as the Geico Gecko  puts it).   They seem little concerned with the needs of their customers in this regard.   Nonetheless, we will push.

Of course, a little pressure from a competitor such as Intel, could not hurt either.  ;)

Charles A. Taylor
UF HPC Center

On May 7, 2013, at 7:36 AM, Brian J. Murrell wrote:

> On Tue, 2013-05-07 at 16:57 +0530, linux freaker wrote:
>
>
>>
>> I can try it once more but really I feel its painful.
>
> It is, which is why we encourage people to use the I/B stack provided by
> RedHat, already built into their kernel and the corresponding user-space
> packages.
>
> It seems that a lot of people (think they) need to install the Mellanox
> I/B stack instead.  Perhaps this is true for your (and everyone else's)
> case, or perhaps not.  I can't really tell, and am not really involved
> closely enough in I/B to know.
>
> But ultimately, I wonder why, given all of the apparent need for
> whatever Mellanox does differently than the upstream OFED and/or RH I/B
> stacks are doing, that these needs for the Mellanox stack are not being
> pushed back into either OFED or the upstream kernel I/B stack.  Life
> really would be so much easier for so many people if it were.
>
> Maybe if Mellanox hears from enough of their customers about the pain it
> is to use their hardware they might try to get their stuff upstream.
>
> b.
>
>
>
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