For those old enough to have heard somebody as great as
John Lennon sing that "the dream is over",
and rather mediocre "philosophers" claim the "end of history",
prophecies that were never confirmed,
reading bombastic claims that MPI is dead is not so unsettling.
After all, reports of the death of Fortran, like Mark Twain's death,
have been greatly exaggerated.
It continues to hang on, outlived his creators,
and shows no sign of dying anytime soon.
Is Exascale really needed?
If so, would the hardware paradigm have to change also perhaps?
(Good scaling properties and reliability are problems not only for
software, are they?)
Why can't MPI adapt to the new scenario?
Gus Correa
On 04/08/2015 03:57 PM, Scott Atchley wrote:
There is concern by some and outright declaration by others (including
hardware vendors) that MPI will not scale to exascale due to issues like
rank state growing too large for 10-100 million endpoints, lack of
reliability, etc. Those that make this claim then offer up their
favorite solution (a PGAS variant, Chapel, Legion, Open Community
Runtime). Several assert that the event-driven/task-driven runtimes will
take care of data partitioning, data movement, etc. and that the user
only has to define relationships and dependencies while exposing as much
parallelism as possible.
The domain scientists shudder at the thought of rewriting existing
codes, some of which have existed for decades. If they do get funding to
rewrite, which new programming model should they pick? At this point,
there is no clear favorite.
On Wed, Apr 8, 2015 at 2:31 PM, Prentice Bisbal
<prentice.bis...@rutgers.edu <mailto:prentice.bis...@rutgers.edu>> wrote:
I got annoyed by this article and had to stop reading it. I'll go
back later and try to give it a proper critique, but obviously
disagree with most of what I've read so far. Right of the bat, the
author implies that Big Data = HPC, and I disagree with that.
More ranting to come....
Prentice
On 04/08/2015 01:16 PM, H. Vidal, Jr. wrote:
Curious as to what the body of thought is here on this article:
http://www.dursi.ca/hpc-is-__dying-and-mpi-is-killing-it/
<http://www.dursi.ca/hpc-is-dying-and-mpi-is-killing-it/>
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