Re: rdma-core 12 breaks libibverbs ABI

Coulter, Susan K
2017-01-31T18:37:58Z

> On Jan 27, 2017, at 7:32 AM, Doug Ledford <dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org> wrote:
>
> On 1/26/2017 8:17 PM, Hefty, Sean wrote:
>>> - Ship libibverbs.rpm with the updated driver and matched libibverbs
>>> This is pretty easy, I probably would recommend this.
>>
>> This has issues if there are multiple providers present. Maybe that doesn't happen in non-testing environments. I wonder if the distros would agree with this approach.
>
> I don't know how much I would rely on the belief that mixed environments
> don't happen outside of testing. In particular, the structure of Lustre
> filesystems or the need to gateway from a fabric that one brand of
> storage server doesn't support to another one would both seem to be
> times when mixed hardware might exist. For that matter, the typical
> stock trading RDMA environment mixes IB and Ethernet, maybe in the
> future it will have OPA in there too?

This is happening now - not in the future.
LANL and other DOE labs already have OPA and IB/mlnx on the same host.

> I think you are right that it is
> the most common, but I don't think we can rely on it being that way all
> the time.
>
> --
> Doug Ledford <dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
> GPG Key ID: B826A3330E572FDD
> Key fingerprint = AE6B 1BDA 122B 23B4 265B 1274 B826 A333 0E57 2FDD
>

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Susan Coulter / HPC-DES
Network Capability Lead
(505) 667-8425
“Once in a while you get shown the light
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