HPC

As an HPC old-timer, I’m used to thinking of HPC networks as large layer-2 (L2) subnets.  All HPC traffic (e.g., MPI traffic) is therefore designed to stay within a single L2 subnet. The next layer up — L3 — is the “networking” layer in the OSI network model; it adds mo…

MPI-3 has been out for over a year and a half.  MPICH supports all of the mandatory MPI-3 behavior and some of its optional semantics.  Open MPI supports all of MPI-3 except the new one-sided semantics.  New functionality is becoming mature in both, and that maturity is trickling down to the impleme…

It took us longer than we intended, but we finally released Open MPI v1.7.4.   Woo hoo!  (we got nice coverage from El Reg, too) This is a monster release; it represents hundreds (thousands? millions?) of person-hours of work.  Consider this a ginormous “thank you!” to the entire Open MP…

We announced the Network locality project at SC’13, and generated a LOT of interest (far more than I even anticipated!).  As a refresher, here’s a link to a a blog entry we wrote about Netloc back in November. There is still much work to be done; we’re actively continuing work in m…

In my last blog post, I described a new collaboration between the MPI community and the OpenFabrics verbs community. The collaboration started with the OpenFrameworks group asking the MPI community to list its requirements for a lower layer network API to the OpenFabrics OpenFrameworks working group…

A few months ago, Sean Hefty from Intel started an effort to design a new low-level network API to replace libibverbs. That is, it’s not libibverbs 2.0 — it’s a new API that aims to both expand the scope of what libibverbs did, and also to address many of its much-criticized shortc…

Today’s blog post is written by Joshua Ladd, Open MPI developer and HPC Algorithms Engineer at Mellanox Technologies. At some point in the process of pondering this blog post I noticed that my subconscious had, much to my annoyance, registered a snippet of the chorus to Paul Simon’s time…

The 21st European MPI Users’ Group Meeting, EuroMPI/AISA 2014, will be held in Kyoto, Japan, 9th – 12th September, 2014. Background and topics EuroMPI is the preeminent meeting for users, developers and researchers to interact and discuss new developments and applications of message-pass…

NAME MPI_Festivus – An MPI function for the rest of us…