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Belated April Fool’s blog post

April 11, 2014 at 6:47 am PST

MPIoEI 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.  And I didn’t find out about the error until after I returned from vacation (long after April 1st).

Sad panda.

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EuroMPI/ASIA 2014: Call for Workshop papers

March 24, 2014 at 9:00 am PST

Held in conjunction with EuroMPI/ASIA 2014 (see the associated call for papers), September 9-12, 2014.  In-cooperation status with ACM and SIGHPC.

This year, EuroMPI/ASIA 2014 will hold two workshops.  Accepted workshop papers will be included in ACM’s ICPS conference proceedings of the EuroMPI/ASIA 2014.

Workshop information is available on the EuroMPI/ASIA 2014 web site, and details of their workshops are in their web respective sites. If you have any further questions, please contact associated workshop organizers listed in their workshop web sites.

We are looking forward to your submissions!

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Open MPI 1.7.5 released

March 21, 2014 at 6:46 am PST

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:

  1. MPI-3.0 conformance
  2. OpenSHMEM support (Linux only)

See this post on the Open MPI announcement list for more details.

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HPC in L3

March 10, 2014 at 11:30 am PST

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 more abstractions than are available in L2.  For example, IP switching and routing occurs at L3.  Indeed, L3-based networks can be comprised of multiple subnets.

I’ve come to appreciate that, especially with modern high-speed networking gear, there is no reason for limiting HPC networks to L2.

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What’s Next for MPI?

February 18, 2014 at 3:40 am PST

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 implementations that are derived from those two.

So what’s next?  Are we done?

Far from it.

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