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Open MPI new versioning scheme and roadmap
Jun 23,2015
Open MPI recently updated its version numbering scheme and development roadmap. This new scheme aims to provide more semantic information in the Open MPI "A.B.C" version number to both end users and system administrators. There are a number of detai...
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The state of libfabric in Open MPI
Mar 17,2015
Yesterday morning, I gave a presentation at the 2015 OpenFabrics Software Developers' Workshop.  I discussed the status of libfabric support in Open MPI. Here's a copy of my slides: In short, the Open MPI development master (what will ...
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A Farewell to LAM/MPI
Mar 06,2015
With a little sadness, I note that LAM/MPI was officially retired recently. LAM/MPI's hosting provider, Indiana University, made the decision not to renew the lam-mpi.org domain any more.  As of a few weeks ago, LAM/MPI's web site is no more, an...
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Open MPI: behind the scenes
Feb 09,2015
Working on an MPI implementation isn't always sexy.  There's a lot of grubby, grubby work that needs to happen on a continual basis to produce a production-quality MPI implementation that can be used for real-world HPC applications. Sure, we alw...
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Tree-based launch in Open MPI (part 2)
Jan 21,2015
In my prior blog entry, I described the basics of Open MPI's tree-based launching system over ssh (yes, there are still some valid / good reasons for using ssh over a native job scheduler / resource manager's parallel launch mechanisms...). That entr...
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Tree-based launch in Open MPI
Jan 19,2015
I've mentioned it before: the run-time systems of MPI implementations are frequently unsung heroes. A lot of blood, sweat, tears, and innovation goes into parallel run time systems, particularly those that can scale to very large systems.  But t...
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The "vader" shared memory transport in Open MPI: Now featuring 3 flavors of zero copy!
Oct 29,2014
Today's blog post is by Nathan Hjelm, a Research Scientist at Los Alamos National Laboratory, and a core developer on the Open MPI project. The latest version of the "vader" shared memory Byte Transport Layer (BTL) in the upcoming Open...
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MPI over 40Gb Ethernet
May 10,2014
Half-round-trip ping-pong latency may be the first metric that everyone looks at with MPI in HPC, but bandwidth is one of the next metrics examined. 40Gbps Ethernet has been available for switch-to-switch links for quite a while, and 40Gbps NICs are ...
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Java Bindings for Open MPI
Apr 30,2014
Today's guest blog post is from Oscar Vega-Gisbert and Dr. Jose Roman from the Department of Information Systems and Computing at the Universitat Polit
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New Open MPI stable series launched: v1.8
Apr 11,2014
The Open MPI project released version v1.8 last week.  This is a major release that heralds the beginning of a new production-ready series, full MPI-3.0 support, and a new OpenSHMEM implementation. Open MPI is developed in a tick-tock fashion: ...
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Belated April Fool's blog post
Apr 11,2014
I was on vacation last week, and had a nice April Fool's blog post queued up to be posted at 8am US Eastern time on 1 April 2014. It should have appeared whilst I was relaxing on a beach... but due to a bug in our WordPress installation, it didn't. &...
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Open MPI 1.7.5 released
Mar 21,2014
After a metric ton of work by the entire community, Open MPI has released version 1.7.5. Among the zillions of minor updates and new enhancements are two major new features: MPI-3.0 conformance OpenSHMEM support (Linux only) See this post on the ...
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