On Tue, 18 Sep 2018 20:49:52 +0000 "Jeff Squyres \(jsquyres\) via devel" <devel@lists.open-mpi.org> wrote:
> On Sep 18, 2018, at 3:46 PM, Thananon Patinyasakdikul > <tpati...@vols.utk.edu> wrote: > > > > I tested on our cluster (UTK). I will give a thumb up but I have > > some comments. > > > > What I understand with 4.0. > > - openib btl is disabled by default (can be turned on by mca) ... > > My question is, what if the user does not have UCX installed (but > > they have infiniband hardware). The user will not have fast > > transport for their hardware. As of my testing, this release will > > fall back to btl/tcp if I dont specify the mca to use uct or force > > openib. Will this be a problem? > > This is a question for Mellanox. I may be worth noting here that quite a few clusters with Mellanox IB run the RHEL IB stack and RHEL does not package ucx. Not picking up and using verbs on such a cluster by default seems like a strange behavior to me. /Peter K _______________________________________________ devel mailing list devel@lists.open-mpi.org https://lists.open-mpi.org/mailman/listinfo/devel
