Matias --

You're probably already in pretty good shape.  If you're following master and 
the v2.x branch (and you are), then your code is already in good shape.

I was thinking mostly for users: transitioning from v1.8/v1.10 series to the 
v2.x series -- what kinds of user-noticeable things will they see?


> On Apr 29, 2016, at 12:34 PM, Cabral, Matias A <matias.a.cab...@intel.com> 
> wrote:
> 
> How about for “developers that have not been following the transition from 
> 1.x to 2.0?  Particularly myself J. I started contributing to some specific 
> parts (psm2 mtl) and following changes. However, I don’t have details of what 
> is changing in 2.0. I see there could be different level of details in the 
> “developer’s transition guide book”, ranging from architectural change to 
> what pieces were moved where.
>  
> Thanks,
>  
> _MAC
>  
> From: devel [mailto:devel-boun...@open-mpi.org] On Behalf Of Joshua Ladd
> Sent: Friday, April 29, 2016 7:11 AM
> To: Open MPI Developers <de...@open-mpi.org>
> Subject: Re: [OMPI devel] 2.0.0 is coming: what do we need to communicate to 
> users?
>  
> Certainly we need to communicate / advertise / evangelize the improvements in 
> job launch - the largest and most substantial change between the two branches 
> - and provide some best practice guidelines for usage (use direct modex for 
> applications with sparse communication patterns and full modex for dense.) I 
> would be happy to contribute some paragraphs. 
>  
> Obviously, we also need to communicate, reiterate the need to recompile codes 
> built against the 1.10 series.  
>  
> Best, 
>  
> Josh
>  
> 
> 
> On Thursday, April 28, 2016, Jeff Squyres (jsquyres) <jsquy...@cisco.com> 
> wrote:
> We're getting darn close to v2.0.0.
> 
> What "gotchas" do we need to communicate to users?  I.e., what will people 
> upgrading from v1.8.x/v1.10.x be surprised by?
> 
> The most obvious one I can think of is mpirun requiring -np when slots are 
> not specified somehow.
> 
> What else do we need to communicate?  It would be nice to avoid the confusion 
> users experienced regarding affinity functionality/options when upgrading 
> from v1.6 -> v1.8 (because we didn't communicate these changes well, IMHO).
> 
> --
> Jeff Squyres
> jsquy...@cisco.com
> For corporate legal information go to: 
> http://www.cisco.com/web/about/doing_business/legal/cri/
> 
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-- 
Jeff Squyres
jsquy...@cisco.com
For corporate legal information go to: 
http://www.cisco.com/web/about/doing_business/legal/cri/

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