[ewg] Getting started

[Paulo R. Panhoto]

Thanks a lot for the explanation. Now, it makes sense to me.

On 11/06/12 16:27, Paul Grun wrote:
> Paulo -
> Any RDMA technology (e.g. IB, iWARP or RoCE) is an end-to-end solution.
> Thus to achieve an RDMA solution you MUST treat both ends of the
> communication; there is nothing you can do on one end to achieve an
> RDMA-based low latency solution without treating both ends simultaneously.
>
> As for RDMAP, there's a slight bit of confusion here.  IB, iWARP and RoCE
> all define what I think of as a message service to allow an application to
> communicate in a low latency way with other applications and services on the
> network.  The API for using that message service is the OFA Verbs API.
>
> The Verbs API is 'transport agnostic', meaning that an application can use
> the Verbs API regardless of whether the underlying transport is InfiniBand
> over an IB wire, InfiniBand over an Ethernet wire (i.e. RoCE), or RDMA over
> a TCP/IP/Ethernet network (iWARP).
>
> In the case of iWARP, the 'message service' consists of three layers, called
> MPA, DDP and RDMAP running over a TCP/IP network.
>
> If you follow this link to the InfiniBand Trade Association website,
> http://infinibandta.org/content/pages.php?pg=resources_presentations, you
> will find a presentation from Supercomputing 2010 called "A Unified Approach
> to Networks" which attempts to illustrate this point.
>
> Regards,
> -Paul Grun
>
>> -----Original Message-----
>> From: ewg-bounces at lists.openfabrics.org [mailto:ewg-
>> bounces at lists.openfabrics.org] On Behalf Of Paulo R. Panhoto
>> Sent: Monday, June 11, 2012 10:23 AM
>> To: ewg at lists.openfabrics.org
>> Subject: [ewg] Getting started
>>
>> Hello,
>>
>>       I have a socket application that connects to a third party server.
>> Can it be replaced it with a Verbs application?
>>
>>       So far, I could "learn" that verbs API work either over infiniband
>> (IB, RoCE) or iWARP (with RDMAP on top). Is this correct?
>>
>> Regards,
>>
>> Paulo.
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