Hi,
I've been told UCX is now the default, for openmpi 4.0*
See: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=962180
Is there some performance work to point to ?
Regards
Alastair
On 11/06/2020 10:14, Brice Goglin wrote:
> Hello
>
> You say "It is expected to use UCX as the transport
Hello
You say "It is expected to use UCX as the transport layer under openmpi
and mpich". It is actually optional, OpenMPI works fine without UCX on
non-Mellanox networks. Worse, UCX says it supports some networks such as
OPA while its actual performance is very bad, people have to uninstall
UCX
Package: wnpp
Severity: wishlist
Owner: Alastair McKinstry
* Package name: ucx
Version : 1.8.0
Upstream Author : Mellanox Ltd.
* URL : https://openucx.github.io/ucx/index
* License : BSD
Programming Lang: C
Description : A high performance
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