IBSRP and switches

[Ron Croonenberg]

I am actually looking into iSER

thanks,

Ron

On 02/10/2015 10:14 PM, Oded Shanoon wrote:
> Hi,
>
> We (Mellanox) are now working on iSER for FreeBSD.
> We should have something running in a couple of months. I'm not sure when exactly it will be commited to upstream.
>
> You are welcome to contact me if you have questions.
>
>
> Regards,
>
> Oded Shanoon
> OFED-FreeBSD Team Leader
> Mellanox Technologies, Raanana
>
> -----Original Message-----
> From: owner-freebsd-infiniband at freebsd.org [mailto:owner-freebsd-infiniband at freebsd.org] On Behalf Of Ron Croonenberg
> Sent: Tuesday, February 10, 2015 8:01 PM
> To: John Nielsen; Ron Croonenberg
> Cc: freebsd-infiniband at freebsd.org
> Subject: Re: IBSRP and switches
>
>
>
> On 02/10/2015 10:39 AM, John Nielsen wrote:
>> On Feb 10, 2015, at 9:19 AM, Ron Croonenberg <ronc at lanl.gov> wrote:
>>
>>>   From what I understand IBSRP is a point to point protocol and cannot be switched over an IB switch, correct? (and the presented devices cannot be see by initiators 'through' a switch.
>>
>> At $work we use SRP over InfiniBand with lots of switches in the mix. Never had an issue.
>>
>
> Ok, I'll try some of that.  I assume you were able to see all drives on all ports. What I am trying to do is see all drives on all hosts (connected to a switch). IBSRP seems to be 'point to point' So I wonder if it (ibsrp) will let me mount a drive multiple times. (I am doing this in a 'not so posix' kind of way)
>
>>> Is there a 'scsi protocol' that I can run over IB that can be switched?
>>
>> Unfortunately, there isn't currently SRP support on FreeBSD. There is RDMA support, so it might be feasible to port the SRP code from Linux, but I haven't really looked in to it.
>
> That is why I am looking into it this way, because of RDMA.
>
> There is also something called ISER (iSCSI extensions over RDMA)
>
>> There's always iSCSI. FreeBSD 10.0 saw the addition of the
>> kernel-based target and initiator (with some improvements since), but
>> I don't think it takes advantage of RDMA or other acceleration
>> techniques when used with InfiniBand. I'd love to be wrong. :)
>
> right, but I am trying to go for the highest performance that is reliable.
>
>> JN
>>
>
>
> Ron
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