[ewg] Re: [OMPI devel] [ofa-general] Re: OMPI over ofed udapl - bugs opened

[Jeff Squyres]

On May 10, 2007, at 8:23 AM, Or Gerlitz wrote:

> A different approach which you might want to consider is to have at  
> the btl level --two-- connections per <src,dst> ranks. so if A  
> wants to send B it does so through the A --> B connection and if B  
> wants to send A it does so through the B --> A connection. To some  
> extent, this is the approach taken by IPoIB-CM (I am not enough  
> into the RFC to understand the reasoning but i am quite sure this  
> was the approach in the initial implementation). At first thought  
> it mights seems not very elegant, but taking it into the details  
> (projected on the ompi env) you might find it  even nice.

What is the advantage of this approach?

-- 
Jeff Squyres
Cisco Systems