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Subject: Re: [OMPI devel] Multi-Rail and Open IB BTL
From: Don Kerr (Don.Kerr_at_[hidden])
Date: 2007-11-09 13:24:02


both, I was thinking of listing what I think are multi-rail requirements
but wanted to understand what the current state of things are

Jeff Squyres wrote:

>Don --
>
>Are you asking what *does* it do, or what *should* a BTL do?
>
>On Nov 9, 2007, at 1:09 PM, Don Kerr wrote:
>
>
>
>>Gleb,
>>
>>Another question. What about the case of one node with 2 ports and
>>one
>>node with one port. Does the open ib btl allow the side with 2
>>ports to
>>establish two endpoints to the single remote port?
>>
>>-DON
>>
>>Gleb Natapov wrote:
>>
>>
>>
>>>On Thu, Nov 01, 2007 at 11:15:21AM -0400, Don Kerr wrote:
>>>
>>>
>>>
>>>
>>>>How would the openib btl handle the following scenario:
>>>>Two nodes, each with two ports, all ports are on the same subnet
>>>>and switch.
>>>>
>>>>Would striping occur over 4 connections or 2?
>>>>
>>>>
>>>>
>>>>
>>>Only two connections will be created.
>>>
>>>
>>>
>>>
>>>
>>>>If 2 is it equal distribution or are both local ports connected to
>>>>the
>>>>same remote port?
>>>>
>>>>
>>>>
>>>>
>>>>
>>>Equal distribution.
>>>
>>>--
>>> Gleb.
>>>_______________________________________________
>>>devel mailing list
>>>devel_at_[hidden]
>>>http://www.open-mpi.org/mailman/listinfo.cgi/devel
>>>
>>>
>>>
>>>
>>_______________________________________________
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>>
>>
>
>
>
>